A high-throughput corrosion test method and test system for marine engineering materials

Abstract

The application provides a high-throughput corrosion test method and test system for marine engineering materials, and the test system comprises a loading system and an environment system, and the test method comprises the following steps: S1, clamping a test sample; S2, selecting a test environment type; S3, setting target parameters; S4, adjusting parameters of liquid medium and / or gas medium to meet requirements; S5, inputting the liquid medium and / or the gas medium into an environment box and adjusting according to current parameters; after any one of steps S1 to S5, the method comprises the following step: S6, starting the loading system to apply a load to the test sample. Through the setting of the high-throughput corrosion test method, the corrosion environment of global typical sea areas can be simulated, and constant stress load, slow strain load and alternating cyclic load can be independently applied to batched test samples, and automatic monitoring of the whole test process can be realized, the comprehensive coordination of different environments, loads and other factors is realized, and the corrosion fatigue test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fatigue detection technology of marine engineering materials, in particular to a high-throughput corrosion test method and test system for marine engineering materials. BACKGROUND

[0002] Corrosion and related stress corrosion and corrosion fatigue are one of the main forms of failure of marine engineering materials, which cause great harm to various marine engineering. Obtaining the corrosion behavior characteristic parameters of marine engineering materials through tests is an important basis for marine engineering design, research and application of marine engineering materials.

[0003] There are many and complex factors leading to material corrosion phenomenon, and the internal cause is material (mainly determined by composition, microstructure and internal stress state), and different materials have different corrosion characteristics. External causes include environmental conditions and load conditions. For marine engineering materials, the environmental conditions affecting corrosion mainly include the salinity, temperature, oxygen content and microorganisms of the seawater medium, and the temperature, humidity and oxygen content of the air medium. The load conditions affecting corrosion include constant stress load, slow strain load, alternating cyclic load, etc. The safe and reliable application of marine engineering materials needs to be realized through reasonable material selection, optimization design and strengthening of protection measures, and the prerequisite is to master the corrosion performance data of marine engineering materials under various environmental conditions and load conditions. Since the corrosion performance of materials has the characteristics of many influencing factors and large dispersion of test data, a relatively complete set of corrosion performance data of a material needs to be obtained through a large number of tests, including material corrosion data under different corrosion environments and series of load conditions.

[0004] The corrosion data of marine engineering materials in practical application mainly include the following types: (1) the data of material exposure test in various real sea environments (such as real sea coupon test). The corrosion data of material exposed in a specific real sea environment for a certain period of time is mainly obtained by this type of test, which truly reflects the influence of environment and time on the corrosion behavior of the material. However, this type of test has many shortcomings: on the one hand, the coupling effect of environment and load is not reflected in this type of test under general conditions, and on the other hand, the test environment conditions are single and cannot be accurately controlled, which can only reflect the specific sea environment and is difficult to cover other sea areas. In addition, the test period is long, generally in years. (2) The data of material exposure test in various laboratory simulated environments (such as indoor accelerated corrosion test). The corrosion data of material exposed in a specific simulated environment for a certain period of time is mainly obtained by this type of test, which can reflect the influence of specific environmental factors such as the temperature and salinity of liquid medium, the temperature and humidity of air medium, etc. on the corrosion behavior of the material. This type of test is simple and convenient, controllable, and has a relatively short test period. However, this type of test also has the disadvantage that the coupling effect of environment and load is not reflected since no load is applied. (3) The data of material bearing test in various laboratory simulated environments (such as stress corrosion test, corrosion fatigue test, etc.). The corrosion failure data of material bearing a specific load exposed in a specific simulated environment for a certain period of time is mainly obtained by this type of test, which can effectively reflect the comprehensive effect of environment and load on the corrosion behavior of the material and can be directly applied to the design of marine engineering structures. However, this type of test mainly focuses on single specimen testing, which has a relatively low test efficiency. The environmental conditions of different tests are difficult to unify, which affects the comparability and effectiveness of the data. In addition, the environmental conditions of this type of test are generally in a fixed state, and the test process lacks adjustability, which has a relatively weak simulation of actual marine environment.

[0005] The Chinese patent CN202021609840.5 discloses a corrosion fatigue test device simulating marine atmospheric environment, which can combine salt spray test with fatigue test and can be used to evaluate the corrosion fatigue performance of metal materials in marine atmospheric environment. The device has simple structure, convenient installation and disassembly, the temperature of the test cavity is controlled by setting a water bath device, the humidity of the test cavity is controlled by setting a humidifying device, and the temperature and humidity of the test cavity are monitored in real time by setting a temperature and humidity monitoring device, so that the key environmental factors are adjustable, controllable and monitored in real time, and the corrosion fatigue performance in various marine atmospheric environments can be simulated. Although the patent can combine salt spray test with fatigue test for corrosion fatigue test, it can only simulate the atmospheric environment in the sea and cannot simulate the seawater environment in the sea. Moreover, the patent can only detect the corrosion fatigue performance of one sample at a time, and multiple tests are required when comparison tests are needed, which prolongs the detection period and cannot guarantee the consistency of the environmental state of the samples used for comparison tests during the test, affecting the accuracy of the comparison results. In addition, marine engineering materials are not immersed in seawater without movement. For example, when a ship is running, there is high-speed impact between seawater and / or marine atmosphere and the ship. The patent cannot study the corrosion fatigue effect of high-speed impact on ship plate materials. SUMMARY

[0006] The technical problem solved by the present application is that the existing marine engineering material corrosion performance detection device cannot coordinate the comprehensive effect of different environmental, load and other influencing factors, cannot simulate the actual environment when the ship is running at high speed, cannot study the corrosion fatigue of the ship plate material when the ship is running, and the existing test system has relatively low test efficiency and long test period.

[0007] The present application discloses a high-throughput corrosion test method for marine engineering materials, which is used for a high-throughput corrosion test system for marine engineering materials. The high-throughput corrosion test system for marine engineering materials comprises a loading system and an environment system. The loading system is used to independently apply corresponding force load to each sample according to the set test parameter requirements. The environment system comprises an environment box, a liquid medium regulating device and a gas medium regulating device. The environment box is used to place the sample and can load the liquid medium and the gas medium for test. The liquid medium regulating device is used to regulate the technical parameters of the liquid medium for test and deliver the liquid medium into the environment box. The gas medium regulating device is used to regulate the technical parameters of the gas medium for test and deliver the gas medium into the environment box.

[0008] The test method comprises the following steps:

[0009] Step S1: clamping the sample: according to the test requirements, a corresponding number of samples are assembled into the environment box, and the sample is connected with the loading system.

[0010] Step S2: selecting a test environment type;

[0011] Step S3: setting target parameters of the corresponding medium in the environmental chamber corresponding to the selected test environment type in step S2, the medium being a liquid medium and / or a gas medium, the parameters of the liquid medium including at least temperature, salinity, flow rate, and liquid level in the environmental chamber, and the parameters of the gas medium including at least temperature, humidity, and circulation speed;

[0012] Step S4: starting the liquid medium regulating device to adjust the parameters of the liquid medium therein to meet the requirements, and / or starting the gas medium regulating device to adjust the parameters of the gas medium therein to meet the requirements;

[0013] Step S5: connecting the liquid medium regulating device and / or the gas medium regulating device to the environmental chamber, inputting the liquid medium and / or the gas medium into the environmental chamber, adjusting the input rate of the liquid medium and / or the gas medium according to the flow rate requirement of the liquid medium and / or the circulation speed requirement of the gas medium, and adjusting the parameters of the liquid medium and / or the gas medium according to the current parameter values of the liquid medium and / or the gas medium in the environmental chamber;

[0014] Further, after any one of steps S1 to S5, the following step is further included:

[0015] Step S6: starting the loading system to apply a load to the test sample.

[0016] Further, a high-speed jetting assembly is arranged in the environmental chamber, the high-speed jetting assembly being arranged corresponding to the test sample, and the high-speed jetting assembly being connected to the liquid medium regulating device and / or the gas medium regulating device, for jetting high-speed test medium to the surface of the test sample, the test medium including the liquid medium and / or the gas medium.

[0017] The selectable test environment types in step S2 include at least:

[0018] Sea water scouring environment: in this environment, the liquid medium and the gas medium exist in a mixed state in the environmental chamber, and in addition, high-speed test medium is jetted to the test sample, the jetted test medium including the liquid medium and / or the gas medium.

[0019] Further, the selectable test environment types in step S2 include at least:

[0020] Sea water immersion environment: in this environment type, the liquid medium fills the height below the gas inlet pipeline and the gas outlet pipeline in the environmental chamber; this environment is used for long-term immersion of the test sample to simulate the corrosion fatigue environment of the engineering material under the sea level for a long time;

[0021] Air environment above sea level: in this environment, there is no liquid medium in the environmental box or the liquid medium is discharged to a position below the sample parallel section;

[0022] Sea environment: in this environment, the lower half of the environmental box is a liquid medium, and the upper half is a gas medium, and the interface between the liquid medium and the gas medium is close to the middle position of the sample parallel section;

[0023] Mixed sea environment: in this environment, the environmental state in the environmental box is replaced by two or more of the sea water immersion environment, the air environment above sea level, the sea environment, and the sea water flushing environment.

[0024] Further, the liquid medium regulating device comprises a liquid tank, a liquid temperature regulating component, a high-concentration liquid medium tank, and a water inlet pipe. The temperature liquid temperature regulating component comprises a first electric heating device and a liquid cooling component. In step S4, the parameter adjustment of the liquid medium comprises the following steps:

[0025] Step S41: detecting the current parameter value of the liquid medium in the liquid tank; the current parameter value at least includes the current liquid temperature and the current salinity;

[0026] Step S42: comparing the current parameter value obtained in step S41 with the set requirement of the liquid medium parameter set in step S3. When one or more of the current parameter values do not meet the set requirement of step S3, step S43 is executed. When all parameters of the liquid medium meet the setting of step S3, step S47 is executed.

[0027] Step S43: when the temperature of the liquid medium does not meet the set requirement of step S3, step S44 is executed; when the salinity of the liquid medium does not meet the set requirement of step S3, step S45 is executed.

[0028] Step S44: judging the state that the current liquid temperature does not meet the set requirement:

[0029] When A < D-ΔD, the first electric heating device is started to heat the liquid medium. When the temperature of the liquid medium meets the set requirement, the first electric heating device is closed, and step S41 is executed.

[0030] When A > D+ΔD, the liquid cooling component is started to cool the liquid medium. When the temperature of the liquid medium meets the set requirement, the liquid cooling component is closed, and step S41 is executed. Then step S41 is executed.

[0031] Step S45: judging the state that the current salinity does not meet the set requirement:

[0032] When B

[0033] When B

[0034] Step S47: issuing a prompt indicating that the parameters of the liquid medium are adjusted to meet the target parameters set in step S3;

[0035] Wherein, the set requirements of the parameters of the liquid medium set in step S3 are: D-ΔD≤A≤D+ΔD, E-ΔE≤B≤E+ΔE, A is the current liquid temperature value of the liquid medium in the liquid tank, B is the current salinity value of the liquid medium in the liquid tank, D is the target temperature of the liquid medium, ΔD is the allowed liquid deviation temperature, E is the target salinity of the liquid medium, ΔE is the allowed liquid deviation salinity, D, ΔD, E, ΔE are all pre-set in step S3.

[0036] Further, the liquid medium regulating device further comprises an oxygen generator; in step S3, the parameters of the liquid medium further include oxygen content,

[0037] Then step S41 further comprises: detecting the current oxygen content of the liquid medium;

[0038] Step S43 further comprises: when the oxygen content of the liquid medium does not meet the set requirements of step S3, executing step S46;

[0039] Step S46: starting the oxygen generator to increase the oxygen content in the liquid tank, when the oxygen content of the liquid medium meets the set requirements, closing the oxygen generator, and executing step S41;

[0040] Wherein, the set requirements of the parameters of the liquid medium set in step S3 further include: C≥F, C is the current oxygen content of the liquid medium in the liquid tank, F is the target oxygen content of the liquid medium, F is pre-set in step S3.

[0041] Further, the gas medium regulating device comprises a gas tank, a gas temperature regulating assembly, and a gas humidity regulating assembly, the gas temperature regulating assembly comprises a second electric heating device and a gas cooling assembly, the gas humidity regulating assembly comprises a humidifier, and in step S4, the parameter adjustment of the gas medium comprises the following steps:

[0042] Step S41': detecting the current parameter value of the gas medium in the gas tank; the current parameter value at least includes the current gas temperature and the current gas humidity;

[0043] Step S42': comparing the current parameter values obtained in step S41' with the set requirements of the gas medium parameters set in step S3, when one or more of the current parameter values do not meet the set requirements in step S3, executing step S43'; when all the parameters of the gas medium meet the settings in step S3, executing step S46';

[0044] Step S43': when the temperature of the gas medium does not meet the set requirements in step S3, executing step S44'; when the humidity of the gas medium does not meet the set requirements in step S3, executing step S45';

[0045] Step S44': judging the state in which the current gas temperature does not meet the set requirements:

[0046] When J

[0047] When J > M + AM, starting the gas cooling assembly to cool the gas medium, and when the temperature of the gas medium meets the set requirements, closing the gas cooling assembly and executing step S41';

[0048] Step S45': starting the humidifier to humidify the gas tank, and when the humidity of the gas medium meets the set requirements, closing the humidifier and executing step S41';

[0049] Step S46': issuing a prompt indicating that the parameters of the gas medium are adjusted to meet the target parameters set in step S3;

[0050] In step S3, the set requirements of the gas medium parameters are: M - AM ≤ J ≤ M + AM, K ≥ N, J is the current gas temperature value of the gas medium in the gas tank, K is the current humidity value of the gas medium in the gas tank, M is the target temperature of the gas medium, AM is the allowed gas deviation temperature, N is the target humidity of the gas medium, and M, AM and N are all pre-set in step S3.

[0051] Further, the liquid medium regulating device comprises a liquid tank, a liquid temperature regulating assembly, a high-concentration liquid medium tank and a water inlet pipe. The liquid temperature regulating assembly comprises a first electric heating device and a liquid cooling assembly. In step S5, adjusting the parameters of the liquid medium according to the current parameter detection values of the liquid medium in the environmental tank comprises the following steps:

[0052] Step S51: detecting the current parameter values of the liquid medium in the environmental tank, including the current liquid temperature P and the current liquid salinity Q of the environmental tank;

[0053] Step S52: compare the detected current parameter value with the set requirement of the liquid medium parameter set in step S3 one by one, and perform corresponding operation according to the corresponding parameter type, wherein the comparison of the current liquid temperature performs step S53; the comparison of the current salinity performs step S54;

[0054] Step S53: compare the current liquid temperature P with the liquid temperature set requirement, and perform the following operation according to the comparison result:

[0055] When P < D-ΔD, start the first electric heating device to heat the liquid medium, when the temperature of the liquid medium meets the set requirement, close the first electric heating device, and perform step S51;

[0056] When P > D+ΔD, start the liquid cooling assembly to cool the liquid medium, when the temperature of the liquid medium meets the set requirement, close the liquid cooling assembly, and perform step S51;

[0057] When D-ΔD≤P≤D+ΔD, the first electric heating device and the liquid cooling assembly remain closed, and step S51 is performed;

[0058] Step S54: compare the current salinity Q with the liquid salinity set requirement, and perform the following operation according to the comparison result:

[0059] When Q < E-ΔE, connect the high-concentration liquid medium tank with the liquid tank, inject high-concentration liquid medium into the liquid tank to increase the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the high-concentration liquid medium tank from the liquid tank, and perform step S51;

[0060] When Q > E+ΔE, connect the water inlet pipe with the liquid tank, inject water into the liquid tank to reduce the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the water inlet pipe from the liquid tank, and perform step S51;

[0061] When E-ΔE≤Q≤E+ΔE, the high-concentration liquid medium tank and the water inlet pipe remain disconnected from the liquid tank, and step S51 is performed.

[0062] Further, the liquid medium regulating device further comprises an oxygen generator; in step S3, the parameters of the liquid medium further comprise oxygen content,

[0063] Then step S51 further comprises: detecting the current oxygen content R of the liquid medium in the environment tank;

[0064] Step S52 further comprises: the comparison of the current oxygen content performs step S55;

[0065] Step S55: compare the current oxygen content R with the oxygen content set requirement, and perform the following operation according to the comparison result:

[0066] When R < F, oxygen generator is started to increase oxygen in liquid tank, when oxygen content of liquid medium meets set requirement, oxygen generator is closed, and step S51 is executed;

[0067] When R ≥ F, oxygen generator keeps closed state, and step S51 is executed.

[0068] Further, the gas medium regulating device comprises a gas tank, a gas temperature regulating assembly, and a gas humidity regulating assembly, the gas temperature regulating assembly comprises a second electric heating device and a gas cooling assembly, and the gas humidity regulating assembly comprises a humidifier; in step S5, adjusting the parameters of the gas medium according to the current parameter detection value of the gas medium in the environment tank comprises the following steps:

[0069] Step S51': detecting the current parameter value of the gas medium in the environment tank, including current gas temperature T and current oxygen content U of the environment tank;

[0070] Step S52': comparing the current parameter value obtained by detection with the set requirement of the gas medium parameter set in step S3 one by one, and performing corresponding operation according to corresponding parameter type, wherein comparison of the current gas temperature performs step S53'; comparison of the current oxygen content performs step S54';

[0071] Step S53': comparing the current gas temperature T with the gas temperature set requirement, and performing the following operation according to the comparison result:

[0072] When T < M-ΔM, the second electric heating device is started to heat the gas medium, when the temperature of the gas medium meets the set requirement, the second electric heating device is closed, and step S51' is executed;

[0073] When T > M+ΔM, the gas cooling assembly is started to cool the gas medium, when the temperature of the gas medium meets the set requirement, the gas cooling assembly is closed, and step S51' is executed;

[0074] When M-ΔM≤T≤M+ΔM, the second electric heating device and the gas cooling assembly keep closed, and step S51' is executed;

[0075] Step S54' comprises: comparing the current humidity U with the humidity set requirement, and performing the following operation according to the comparison result:

[0076] When U < N, the humidifier is started to humidify the gas tank, when the humidity of the gas medium meets the set requirement, the humidifier is closed, and step S51' is executed;

[0077] When U ≥ N, the humidifier keeps closed state, and step S51' is executed.

[0078] The application further discloses a high-throughput corrosion test system for marine engineering materials.

[0079] Compared with the prior art, the high-throughput corrosion test method and test system for marine engineering materials have the following advantages:

[0080] 1. The high-throughput corrosion test system can simulate the corrosion environment of typical sea areas in the world, independently load constant stress load, slow strain load and alternating cyclic load on batched samples, and automatically monitor the whole test process, so that the comprehensive coordination of different environments, loads and other factors is realized.

[0081] 2. The high-speed jetting assembly can simulate the seawater scouring environment, especially the high-speed impact environment between seawater and / or marine atmosphere and a ship during the running of the ship, so that the all-around simulation of the use environment of marine engineering materials in various states in the ocean is realized.

[0082] 3. The cooperation of the loading system and the environment system realizes the free regulation of liquid medium, gas medium and sample load, different loads can be independently applied to batched samples, so that the systematic research of high-throughput corrosion test is realized, and the test efficiency is improved.

[0083] 4. The environment box and the test system are simple in structure and easy to use, and the corrosion test efficiency of marine engineering materials is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0084] Figure 1 FIG. 1 is a schematic structural diagram of an environment system according to an embodiment of the application;

[0085] Figure 2 FIG. 2 is a test principle diagram of a test system according to an embodiment of the application;

[0086] Figure 3 FIG. 3 is a structural schematic diagram of a loading system according to an embodiment of the application;

[0087] Figure 4 FIG. 4 is a structural schematic diagram of a loading support according to an embodiment of the application;

[0088] Figure 5 FIG. 5 is a structural schematic diagram of a cross beam according to an embodiment of the application;

[0089] Figure 6 FIG. 6 is a structural schematic diagram of a base according to an embodiment of the application;

[0090] Figure 7 FIG. 7 is a structural schematic diagram of a stand according to an embodiment of the application;

[0091] Figure 8 The schematic view of the bearing capacity analysis of the four actuators of the center under the full load, wherein (a) is the schematic view of the Mises equivalent stress distribution of the beam, (b) is the schematic view of the Mises equivalent stress distribution of the base; (c) is the schematic view of the z direction displacement distribution of the beam; (d) is the schematic view of the z direction displacement distribution of the base;

[0092] Figure 9 The schematic view of the bearing capacity analysis of the 16 actuators under the full load, wherein (a) is the schematic view of the Mises equivalent stress distribution of the beam, (b) is the schematic view of the Mises equivalent stress distribution of the base; (c) is the schematic view of the z direction displacement distribution of the beam; (d) is the schematic view of the z direction displacement distribution of the base;

[0093] Figure 10 The schematic view of the structure of the actuator and the sample clamped by the actuator according to the embodiment of the application;

[0094] Figure 11 The schematic view of the two structures of the sample according to the embodiment of the application;

[0095] Figure 12 The schematic view of the structure of the first clamp according to the embodiment of the application;

[0096] Figure 13 The schematic view of the structure of the second clamp according to the embodiment of the application;

[0097] Figure 14 The schematic view of the structure of the third clamp according to the embodiment of the application;

[0098] Figure 15 The schematic view of the structure of the fourth clamp according to the embodiment of the application;

[0099] Figure 16 The schematic view of the structure of the fifth clamp according to the embodiment of the application;

[0100] Figure 17 The schematic view of the structure of the positioning block according to the embodiment of the application;

[0101] Figure 18 The schematic view of the installation structure of the positioning block according to the embodiment of the application;

[0102] Figure 19 The schematic view of the structure of the environmental box according to the embodiment of the application;

[0103] Figure 20 The schematic view of the structure of the environmental box base cover corrosion-resistant rubber pad, clamp assembly on the installation of the sealing sleeve according to the embodiment of the application;

[0104] Figure 21The schematic diagram of the high-speed medium used for high-speed impact washing of the sample except the rubber sleeve.

[0105] Legend of reference signs:

[0106] 100, environmental box; 110, box body; 111, lower clamp through hole; 112, flange; 120, upper cover assembly; 121, end cover plate; 122, middle upper cover plate; 123, middle lower cover plate; 124, upper clamp through hole; 125, inclined surface; 1251, first inclined surface; 1252, second inclined surface; 130, high-speed jet assembly; 131, high-pressure liquid inlet pipeline; 132, high-pressure medium pipeline; 133, high-speed medium nozzle; 134, first pump body; 140, liquid inlet pipeline; 141, second pump body; 150, liquid outlet pipeline; 151, liquid level control box; 160, air inlet pipeline; 170, air outlet pipeline; 180, first sensing assembly; 181, first liquid temperature sensor; 182, first liquid oxygen content sensor; 183, first gas temperature sensor; 184, first gas humidity sensor; 200, sample; 220, upper sealing sleeve; 230, lower sealing sleeve; 300, loading support; 310, cross beam; 311, first main plate; 312, first cross rib plate; 313, first longitudinal rib plate; 320, base; 321, second main plate; 322, second cross rib plate; 323, second longitudinal rib plate; 324, T-shaped clamping groove; 325, corrosion-resistant rubber pad; 330, column; 331, support section; 332, fastening section; 333, fastening nut; 400, clamp assembly; 410, first clamp; 420, second clamp; 430, third clamp; 440, fourth clamp; 450, fifth clamp; 460, positioning block; 461, blind hole; 462, positioning screw hole; 463, V-shaped groove; 470, positioning screw; 480, compression spring; 500, actuator; 600, liquid medium regulation device; 610, liquid temperature regulation assembly; 611, first electric heating device; 612, liquid cooling pipeline; 613, third pump body; 614, first heat exchanger; 615, first cooling liquid pipeline; 616, first compressor; 617, first water condenser; 620, high-concentration liquid medium tank; 630, oxygen generator; 640, water inlet pipe; 650, overflow pipe; 680, second sensing assembly; 681, second liquid temperature sensor; 682, second liquid salinity sensor; 683, second liquid oxygen content sensor; 700, gas medium regulation device; 710, gas temperature regulation assembly; 711, second electric heating device; 712, second cooling liquid pipeline; 713, second compressor; 714, second water condenser; 715, second heat exchanger; 720, humidifier; 730, pure water tank; 740, fan; 750, third sensing assembly; 751, second gas temperature sensor; 752, second gas humidity sensor. DETAILED DESCRIPTION

[0107] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the present application with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0108] The following specifically describes an ocean engineering material high-throughput corrosion test method and test system according to an embodiment of the present application.

[0109] The present embodiment provides an ocean engineering material high-throughput corrosion test system, as shown in Figures 1-21 The test system includes a loading system and an environment system. The loading system is used to independently apply corresponding force load to each test sample 200 according to the set test parameter requirements, and the force load includes slow strain rate tensile load and / or cyclic load. The environment system is used to form corresponding corrosion medium test environment conditions according to the set test parameter requirements. The loading system includes a loading support 300, a loading device, a clamp assembly 400 and a controller. The loading support 300 is used to provide rigid counterforce support. The clamp assembly 400 is used to clamp the test sample 200, so that the test sample 200 is connected with the loading support 300 and the loading device. The loading device and the controller are used to provide slow strain rate tensile load or cyclic load to the test sample 200. The environment system includes an environment box 100, a liquid medium regulating device 600 and a gas medium regulating device 700. The environment box 100 is used to place the test sample 200, and can load test liquid medium and gas medium. The liquid medium regulating device 600 is used to regulate the technical parameters of the test liquid medium, and deliver the liquid medium to the environment box 100. The gas medium regulating device 700 is used to regulate the technical parameters of the test gas medium, and deliver the gas medium to the environment box 100. The environment box 100 can simultaneously accommodate more than two test samples 200 for testing. The loading support 300 can simultaneously apply the same or different slow strain rate tensile load and / or cyclic load to more than two test samples 200.

[0110] The applicant has investigated the global typical marine environment, and the results are shown in Table 1, wherein the oxygen content in the global atmosphere is stable at 21%, and the oxygen content in seawater is mainly affected by air pressure, the higher the air pressure, the higher the dissolved oxygen content in seawater; the global range can be divided into 7 air pressure zones, wherein the equator is a low pressure zone, and the two poles are high pressure zones, so the dissolved oxygen content in seawater at the two poles is high, and the dissolved oxygen content at the equator is low. Table 2 shows the design of the test environment index of the test system, and the technical parameter index value is set based on the investigation results of the global marine environment parameters shown in Table 1: the salinity index of the liquid medium is 1.0-4.5% NaCl, so as to meet the simulation of the global marine environment seawater salinity; considering that the marine engineering structure and the ship sailing will be subjected to the washing action of sea waves, which may affect the corrosion behavior of the material, in order to improve the test effect, the flow rate of the liquid medium is monitored as a technical index, and according to the current ship speed, the maximum flow rate of the high-speed spraying liquid medium is set to 20 m / s.

[0111] Table 1 Global marine environment parameters

[0112]

[0113] Table 2 Test environment medium index

[0114]

[0115] The corrosion of marine engineering materials is related to not only the environment medium but also the mechanical load. At present, the main corrosion tests are stress corrosion test and corrosion fatigue test in addition to pure corrosion medium exposure test. The test system is intended to realize slow strain rate tensile corrosion test and corrosion fatigue test functions. The sample form is mainly round bar sample, and the force load under various loading stresses and sample radii can be calculated according to formula (1) shown in Table 3. The table shows that when the loading device with a maximum force load of 50 kN and the sample diameter of 3-5 mm are used, the maximum loading stress that can be realized is 1700 MPa level (the maximum calculated value of the loading stress is 1768.4 MPa), which can cover all the strength grades of marine engineering materials in use and most of the strength grades that may be used in the future, so the maximum force load of the test system is designed to be 50 kN. Table 4 shows the setting of the load control technical index, and the load control deviation requirement of the 200 loading capacity of a single sample and the continuous uninterrupted operation time requirement are improved as internal control measures.

[0116] (1)

[0117] Wherein, F is the force load applied to the sample, σ is the loading stress, and r is the sample radius.

[0118] Table 3 Force load calculation values under different loading stresses and sample radii

[0119]

[0120] Table 4 Load control technology index setting

[0121]

[0122] As shown in Figure 3 , Figure 4 , the loading support 300 includes a crossbeam 310, a base 320 and a column 330, the column 330 is arranged between the crossbeam 310 and the base 320, the crossbeam 310 is arranged on the upper side of the column 330, and the base 320 is arranged on the lower side of the column 330. In order to ensure that the loading support 300 has sufficient rigidity to reduce the interference between different test samples 200 in the test process, the crossbeam 310 and the base 320 are designed to be arranged in a plate and rib structure, that is, a "main plate + cross rib plate" structure, and the mounting position of the loading device and the clamping position of the test sample 200 are respectively located at the cross position of the cross rib of the crossbeam 310 and the base 320; the column 330 is connected and fixed with the crossbeam 310 and the base 320 by bolts. Optionally, the environmental box 100 is arranged on the base 320 and located between the base 320 and the crossbeam 310. It should be understood that the column 330 and the environmental box 100 do not interfere with each other.

[0123] As shown in Figure 5As shown, the cross beam 310 includes a first main plate 311, a first cross rib plate 312 and a first longitudinal rib plate 313, the first main plate 311 is arranged at the lower side of the first cross rib plate 312 and the first longitudinal rib plate 313, the first main plate 311 is fixedly connected with the stand column 330, the first cross rib plate 312 and the first longitudinal rib plate 313 are respectively more than two, and the first cross rib plate 312 and the first longitudinal rib plate 313 are arranged in a cross shape. In an embodiment, the first cross rib plate 312 and the first longitudinal rib plate 313 are each 4, the first main plate 311 has a thickness of 100 mm, a length of 1860 mm and a width of 2070 mm, the first cross rib plate 312 and the first longitudinal rib plate 313 have a thickness of 50 mm and a height of 500 mm; the materials of the first main plate 311 and the first cross rib plate 312 and the first longitudinal rib plate 313 can be selected from steel plates with a yield strength of not less than 235 MPa, such as Q235, Q345, Q420 and the like, and the connection mode of the first main plate 311 with the rib plate (the first cross rib plate 312 or the first longitudinal rib plate 313) and the first cross rib plate 312 with the first longitudinal rib plate 313 can adopt a welding process of stick welding or gas shielded welding, and the welding material needs to be matched with the materials of the first main plate 311 and the rib plate; symmetric stand column mounting holes are processed at positions close to the four corners of the first main plate 311, and the mounting hole radius is designed to be 56 mm (slightly larger than the radius 55 mm of the stand column fastening section 332); loading device mounting holes (the mounting hole size and number are matched with the technical parameters of the loading device, and 4 mounting holes are preferably designed for each loading device, and the mounting hole radius is 8.5 mm) are processed on the first main plate 311 close to the cross positions of the first cross rib plate 312 and the first longitudinal rib plate 313 in the cross structure, and the loading device can be mounted below the cross beam first main plate 311 at the cross plate thickness center position by adopting a bolt connection method, one loading device can be mounted at each cross position, and a total of 16 loading devices can be mounted.

[0124] Optionally, the upper end of the loading device is fixedly connected with the loading support 300, and the lower end is connected with the clamp assembly 400. Specifically, the upper end of the loading device is connected with the cross beam 310. Through the above arrangement, the loading device can exert corresponding force load on the test sample 200 under the support of the loading support 300, so as to perform corrosion fatigue test on the test sample 200.

[0125] As Figure 6As shown, the base 320 includes a second main plate 321, a second cross rib plate 322 and a second longitudinal rib plate 323, the second main plate 321 is arranged on the upper side of the second cross rib plate 322 and the second longitudinal rib plate 323, the second main plate 321 is fixedly connected with the column 330, the second cross rib plate 322 and the second longitudinal rib plate 323 are more than two respectively, and the second cross rib plate 322 and the second longitudinal rib plate 323 are arranged in a cross shape. In an embodiment, the second main plate 321 has a thickness of 120 mm, a length of 1860 mm and a width of 2070 mm, the second cross rib plate 322 and the second longitudinal rib plate 323 have a thickness of 50 mm and a height of 500 mm; the material of the second main plate 321 and the rib plate (the second cross rib plate 322 and the second longitudinal rib plate 323) is the same as that of the cross beam 310, and the connection mode of the second main plate 321 and the rib plate, the second cross rib plate 322 and the second longitudinal rib plate 323 can also adopt the welding process of stick welding or gas shielded welding; symmetric column mounting holes are processed at positions close to four corners of the second main plate 321, and the radius of the mounting hole is designed to be 56 mm; four T-shaped clamping grooves 324 for clamping the sample 200 are processed on the surface opposite to the cross beam 310, the center line of the T-shaped clamping groove 324 coincides with the thickness center surface of the second longitudinal rib plate 323 on the opposite surface; meanwhile, four anchor bolt mounting holes are processed at each of the four corner positions of the second main plate 321 of the base, and the hole diameter is matched with the anchor bolt (the recommended specification is M16); when the base 320 is installed, a heat insulation layer is arranged between the base and the foundation.

[0126] As shown in Figure 7 The column 330 includes a cylindrical support section 331, a cylindrical fastening section 332 with external threads and a fastening nut 333 matched with the threads of the fastening section 332. In an embodiment, the support section 331 has a diameter of 180 mm and mainly plays a force bearing role; the fastening section 332 has a diameter of 110 mm, and there are two fastening sections 332 arranged at two ends of the support section 331 respectively, and the two fastening sections 332 are fixedly connected with the base 320 and the cross beam 310 respectively, so that the column 330, the base 320 and the cross beam 310 form a rigid frame structure together. The column 330 is made of steel bars or forgings with a yield strength not less than 235 MPa.

[0127] To ensure that multiple samples 200 can be tested synchronously, the applicant analyzed the load bearing capacity of the loading support 300. The load bearing capacity of the crossbeam 310 and the base 320 of the loading support 300 was analyzed using a linear elastic finite element method, and the column 330 was directly analyzed using an analytical calculation. The Mises equivalent stress and the deformation displacement calculation formula are shown in formula (2) and formula (3) respectively. The material is set to be a low alloy structural steel (the elastic modulus is set to be 210 GPa, and the Poisson's ratio is set to be 0.3). Based on the symmetry of the crossbeam 310 and the base 320, 1 / 4 structure is selected for analysis, and the maximum loading force of a single actuator 500 is set to be 50 kN. The load bearing capacity analysis results of the crossbeam 310 and the base 320 when the center four actuators 500 are simultaneously fully loaded are shown in Table 5, and the overall load bearing capacity of the loading support 300 is shown in Table 5: the maximum Mises equivalent stress of the crossbeam 310 and the base 320 is 28.5 MPa and 78.9 MPa respectively, both of which are located at the loading point, and the ratio to the minimum yield strength (235 MPa) is 12.13% and 33.57% respectively, both of which are far lower than the minimum yield strength; the maximum displacement of the loading point of the crossbeam 310 and the base 320 in the loading direction (z direction) is 0.028 mm and 0.036 mm respectively, and the maximum interference displacement of the adjacent loading points is 0.025 mm and 0.024 mm respectively; the deformation displacement of the column 330 when the center four actuators 500 are simultaneously fully loaded can be calculated by formula (3) to be 0.015 mm; the maximum deformation displacement of the overall loading support 300 when the center four actuators 500 are simultaneously fully loaded can be calculated to be 0.079 mm, and the interference displacement of the adjacent loading points is 0.064 mm. It can be approximately converted that the interference displacement of the adjacent loading points when a single actuator 500 is fully loaded is about 0.016 mm. In the actual use of the test system, the full load operation of the actuator 500 is an extreme case, and the maximum load of the commonly used actuator 500 is about 60% of the design range, that is, the maximum loading force of a single actuator 500 is about 30 kN. According to the above analysis results, a simple conversion can be obtained that when the loading force of a single actuator 500 is 30 kN, the interference displacement of the adjacent loading points is about 0.010 mm. Figure 8

[0128] (2)

[0129] (3)

[0130] In the formula, is the Mises equivalent stress of the column support section; is the z direction (bearing direction) stress of the column support section; is the deformation of the column; is the length of the column support section; ​Force load borne by a single column; Radius of the column support section; E is the modulus of elasticity of the column material (the modulus of elasticity of steel is set as 210000 MPa).

[0131] Table 5 Load-bearing capacity analysis of the loading bracket when the four actuators in the center are simultaneously fully loaded

[0132]

[0133] The load-bearing capacity analysis results of the crossbeam 310 and the base 320 when all the actuators 500 simultaneously exert the maximum loading force (i.e., simultaneously fully loaded) are as follows: Figure 9 The overall load-bearing capacity of the loading bracket 300 is shown in Table 6: the maximum Mises equivalent stress borne by the crossbeam 310 and the base 320 is 106.1 MPa and 80.2 MPa, respectively, both located at the connecting angle position of the cross rib plate and the main plate near the column mounting hole, and the ratio to the minimum yield strength (235 MPa) of the material selected for design is 45.15% and 34.13%, respectively, both lower than half of the minimum yield strength; the maximum displacement of the crossbeam 310 and the base 320 in the loading direction (i.e., the vertical direction) is 0.093 mm and 0.097 mm, respectively; the deformation (i.e., displacement) of the column 330 when all the actuators 500 are simultaneously fully loaded can be calculated by formula (4) to be 0.060 mm; thus, the maximum deformation displacement of the overall loading bracket 300 when all the actuators 500 are simultaneously fully loaded is calculated to be 0.250 mm (i.e., the sum of the deformation displacements of the crossbeam 310, the base 320 and the column 330), and thus the interference displacement of the remaining one actuator 500 when 15 actuators 500 are simultaneously fully loaded is estimated to be about 0.234 mm according to formula (4). In the actual use of the testing machine, the maximum load of the commonly used actuator 500 is about 30 kN, and when 15 actuators 500 simultaneously exert a loading force of 30 kN, the interference displacement of the remaining one loading point is about 0.140 mm; in fact, the possibility of 15 actuators 500 simultaneously reaching the maximum commonly used load is not large, and the following rough estimation is made: when 16 actuators 500 simultaneously perform loading actions of different frequencies and different load values, assuming that the interference of any one actuator 500 by the other 15 actuators 500 is equivalent to the simultaneous half of the maximum commonly used load of the other 15 actuators 500, the estimated interference displacement is about 0.070 mm.

[0134] (4)

[0135] wherein, v 干扰 is the interference displacement of any one actuator by the other 15 actuators; v 梁 is the deformation of the crossbeam; and v 座 is the deformation of the base.

[0136] Table 6 Load support bearing capacity analysis when all actuators are full load

[0137]

[0138] The above analysis results show that the loading support 300 remains in an elastic deformation state within the designed load range, and has good structural rigidity, so that when multiple samples 200 are tested synchronously, the influence between them is minimal, ensuring the accuracy of the test results. In addition, since multiple samples 200 are tested synchronously, they are in the same environmental box 100, ensuring the consistency of the test environment for the same batch of samples 200, thereby achieving comprehensive coordination of the environment, loading state, and other factors of the test sample 200.

[0139] The actuator 500 is a device arranged on the loading support 300 to apply a corresponding load to the sample 200 according to the set load control requirements. When the actuator 500 applies a force load to the sample 200, the loading support 300 provides rigid support for the actuator 500. Figure 10 The figure shows the clamping of the actuator 500 and the sample 200: the actuator 500 is installed on the crossbeam 310 of the loading support 300 by bolt connection; the round bar-shaped sample (as shown in Figure 11 The figure shows that the two ends of the sample 200 are connected to the actuator 500 through the clamp assembly 400, as shown in Figure 10 The clamp assembly 400 includes an upper clamp and a lower clamp. The upper clamp is connected to the loading device and is used to clamp the upper end of the sample 200. The lower clamp is connected to the base 320 and is used to clamp the lower end of the sample 200. It should be understood that the clamp assembly capable of clamping the upper and lower ends of the sample 200 and connecting it to the device for applying a force load to the sample 200 in the prior art meets the requirements of the present embodiment and is not limited here.

[0140] As one of the optional embodiments, as shown in Figures 12-18 The upper clamp includes a first clamp 410, a second clamp 420, and a third clamp 430. The lower clamp includes another first clamp 410, another second clamp 420, a fourth clamp 440, a fifth clamp 450, and a positioning block 460. One end of the sample 200 is connected to the first clamp 410 (as shown in Figure 12 The first clamp 410 is sleeved into the second clamp 420 (as shown in Figure 13 The contact surfaces of the two are designed as spherical surfaces to realize automatic centering during the loading of the actuator 500. The upper end of the sample 200 is threadedly connected to the lead screw of the actuator 500 through the first clamp 410, the second clamp 420, and the third clamp 430 (as shown in Figure 14 The lower end of the sample 200 is threadedly connected to the lead screw of the actuator 500 through the first clamp 410, the second clamp 420, and the fourth clamp 440 (as shown inFigure 15 The fourth clamp 440 is locked in the T-shaped clamping groove 324 of the base 320 through the fifth clamp 450 (as shown in Figure 16 The fourth clamp 440 is locked in the T-shaped clamping groove 324 of the base 320 through the fifth clamp 450 (as shown in Figure 17 The fourth clamp 440 is locked in the T-shaped clamping groove 324 of the base 320 through the fifth clamp 450 (as shown in Figure 18 The fourth clamp 440 is locked in the T-shaped clamping groove 324 of the base 320 through the fifth clamp 450 (as shown in

[0141] As shown in Figures 12-16 The first clamp 410 is in the form of a nut and is used for threaded connection with the end of the sample 200. The second clamp 420 is provided with a connecting hole, which is in communication with an installation groove in the second clamp 420. The end of the sample 200 passes through the connecting hole and enters the installation groove, and is threaded connected with the first clamp 410 which is sleeved in the installation groove. The end of the installation groove away from the connecting hole is provided with a first internal thread, which is used for connection with the third clamp 430 or the fourth clamp 440. One end of the third clamp 430 is provided with a first external thread, and the other end is provided with a second internal thread. The first external thread is used for connection with the first internal thread, so as to realize the fixed connection of the second clamp 420 and the third clamp 430. The second internal thread is used for fixed connection with the output shaft of the actuator 500, so as to realize the loading of the sample 200. The fourth clamp 440 includes a threaded segment and a seat plate. The threaded segment is arranged on the seat plate. One end of the threaded segment away from the seat plate is connected with the first internal thread. The fifth clamp 450 is in the form of a nut and is used for fixed connection of the fourth clamp 440 and the base 320 in cooperation with the threaded segment. The fourth clamp 440 is provided with a V-shaped protrusion, which is used for positioning in cooperation with the positioning block 460.

[0142] As shown in Figure 17 , Figure 18As shown, the positioning block 460 is provided with at least one blind hole 461 near the two ends, a positioning screw hole 462 near the center of the positioning block 460, and a V-shaped groove 463 on one side of the positioning block 460, which is used for cooperating with the V-shaped protrusion to position the fourth clamp 440, so as to facilitate the quick positioning and installation of the fourth clamp 440. The positioning screw 470 is arranged in the positioning screw hole 462, and the end of the positioning screw 470 abuts against the bottom of the T-shaped clamping groove 324. The compression spring 480 is arranged in the blind hole 461, and one end of the compression spring 480 abuts against the bottom surface of the blind hole 461, and the other end abuts against the inner bent edge of the T-shaped clamping groove 324. When the positioning block 460 is installed, the positioning screw 470 is rotated, and due to the abutment of the end of the positioning screw 470 against the bottom of the T-shaped clamping groove 324, the positioning block 460 moves away from the bottom of the T-shaped clamping groove 324 under the action of the threads in the positioning screw hole 462. At this time, the compression spring 480 is compressed, and the positioning block 460 is positioned under the reverse double action force of the positioning screw 470 and the compression spring 480.

[0143] According to the design requirements of the test system, the actuator 500 needs to realize the slow strain rate tension function and the cyclic loading function. In addition to the maximum load force, the main technical parameters that need to be considered for slow strain rate tension test include the tension strain rate. Referring to the commonly used slow strain rate tension testing machine at present, the tension rate of the test system is designed to be 10 -3 S -1 ~10 -7 S -1 In addition to the peak load, the main technical parameters that need to be considered for cyclic loading test include the loading frequency and the displacement amplitude. In theory, the lower the loading frequency, the more significant the corrosion effect. However, too low loading frequency brings the problem of too long test time and too high test cost. Table 7 shows the relationship between the cyclic loading frequency and the test time. Referring to the commonly used corrosion fatigue test loading frequency, the loading frequency of the test system is designed to be 0.1-5 Hz. The displacement amplitude during cyclic loading is related to the length of the sample and the loading stress amplitude. Table 8 shows the correlation data of the displacement amplitude and the loading stress amplitude under the condition that the length of the parallel section of the sample is 150 mm (assuming that the deformation is concentrated in the parallel section of the sample). According to the current and foreseeable future research situation of marine engineering materials, the loading stress amplitude will not be higher than 1000 MPa. Under this condition, the displacement amplitude is not greater than 0.714 mm. Considering a certain test allowance, the maximum displacement amplitude under cyclic loading is designed to be not less than 0.75 mm.

[0144] Table 7 Correlation between cyclic loading frequency and test time

[0145]

[0146] Table 8 Correlation between displacement amplitude and loading stress amplitude

[0147]

[0148] There is mutual interference problem between different actuators 500 installed on the same loading support 300. The following measures are mainly adopted to solve the problem: the rigidity of the loading support 300 is improved as much as possible. The design data of the aforementioned loading support 300 show that the loading support 300 designed under the current controllable manufacturing technology difficulty and acceptable manufacturing cost has very high structural rigidity, which can effectively eliminate the mutual interference between different actuators 500.

[0149] The actuator 500 used in the current special slow strain rate tensile corrosion testing machine is a servo-controlled electric cylinder. The actuator 500 that can be used in the fatigue testing machine has two types: a servo-controlled hydraulic cylinder and a servo-controlled electric cylinder. Within the design range of the technical parameters of the test system, the cost performance of the servo-controlled electric cylinder is higher than that of the servo-controlled hydraulic cylinder, and the servo-controlled electric cylinder can be used for slow strain rate tensile corrosion test and corrosion fatigue test. Therefore, the actuator 500 of the test system is preferentially selected as a servo-controlled electric cylinder. The technical parameter requirements of the servo-controlled electric cylinder are determined according to the design values of the technical parameters of the test system determined above (as shown in Table 9).

[0150] Table 9 Technical parameter requirements of servo-controlled electric cylinder

[0151]

[0152] As an embodiment of the present application, as shown in Figure 19 The environmental box 100 includes a box body 110 and an upper cover assembly 120. The upper cover assembly 120 is arranged on the upper part of the box body 110. The box body 110 is sealed with the upper cover assembly 120. The box body 110 is connected with the liquid medium regulating device 600 and the gas medium regulating device 700, respectively, for forming corrosion medium test environmental conditions in the cavity of the box body 110. At least two test samples 200 can be arranged in the cavity. The test samples 200 are fixedly connected with the clamp assembly 400. The loading device and the loading support 300 are connected with the clamp assembly 400, respectively, for applying load to the test samples 200.

[0153] It should be noted that the test samples 200 can be arranged in the environmental box 100 to be loaded. The arrangement mode can refer to the prior art or use the arrangement mode described above. The box body 110 plays a role of a container for manufacturing a test environment. By combining the states of the gas medium and the liquid medium, various marine corrosion environments can be simulated, so that the material corrosion fatigue test under different marine states can be realized, and the efficiency and accuracy of the corrosion fatigue test are significantly improved.

[0154] In the embodiment, as shown in Figure 19As shown, one or more lower clamp through holes 111 are arranged on the bottom plate of the box 110, and one or more upper clamp through holes 124 are arranged on the upper cover assembly 120, the lower clamp through holes 111 and the upper clamp through holes 124 are arranged one by one in correspondence, and any set of corresponding lower clamp through holes 111 and upper clamp through holes 124 are used to arrange the sample 200 and / or the clamp assembly 400. Through the above arrangement, the upper and lower ends of the sample 200 can be fixed with the clamp assembly 400, and the clamp assembly 400 can be connected with a loading device such as an actuator 500 or a mechanical testing machine, so as to load the sample 200 while conducting the corrosion test, so that the environment of the sample 200 is more close to the actual use environment, and the fatigue corrosion performance of the marine engineering material can be more accurately detected. The environmental box 100 provided in the embodiment can create a certain test environment for batch samples 200, and does not affect the application of force load to the sample 200. The test environment includes: a circulating liquid immersion environment, a circulating gas environment, a circulating liquid and gas mixed environment, a liquid spraying and circulating gas mixed environment, an environment for implementing high-speed medium spraying on the sample 200 (preferably liquid medium high-speed spraying), etc.

[0155] As an optional embodiment of the present application, an upper sealing sleeve 220 is arranged near the upper end of the sample 200, the first end of the upper sealing sleeve 220 is arranged on the outer periphery of the sample 200, the second end of the upper sealing sleeve 220 is provided with a skirt extending outwardly, which is used to seal with the upper surface of the upper cover assembly 120, and a lower sealing sleeve 230 is arranged near the lower end of the sample 200, a flange 112 protruding upward is arranged on the upper surface of the bottom plate in the circumferential direction of the lower clamp through hole 111, the first end of the lower sealing sleeve 230 is arranged on the sample 200, and the second end of the lower sealing sleeve 230 is arranged on the flange 112. It should be understood that the arrangement of the upper clamp through hole 124 and the lower clamp through hole 111 is easy to cause the leakage of gas medium and liquid medium and the like through the holes or the surface of the sample 200, which changes the test environmental conditions and affects the test results, and the upper sealing sleeve 220 and the lower sealing sleeve 230 are used to seal the upper clamp through hole 124, the lower clamp through hole 111 and the surface of the sample 200 respectively, thereby effectively avoiding the leakage of test medium and ensuring the stability of the test process. Specifically, the lower clamp of the loading device is connected to the lower end of the sample 200 through the lower clamp through hole 111, the first end of the lower sealing sleeve 230 is sleeved on the position of the sample 200 near the lower clamp and is fastened and sealed by a certain fastening device (such as a binding belt), and the second end of the lower sealing sleeve 230 is sleeved on the flange 112 in the cup shape in the circumferential direction of the lower clamp through hole 111 and is fastened and sealed by a certain fastening device (such as a binding belt); the upper clamp of the loading device is connected to the upper end of the sample 200 through the upper clamp through hole 124 on the upper cover assembly 120, the first end of the upper sealing sleeve 220 is sleeved on the position of the sample 200 near the upper clamp and is fastened and sealed by a certain fastening device (such as a binding belt), and the second end of the upper sealing sleeve 220 is provided with a skirt, when the end cover plate 121, the middle upper cover plate 122 and the middle lower cover plate 123 are combined to cover the box body 110, the skirt of the upper sealing sleeve 220 covers the edge of the upper clamp through hole 124 on the end cover plate 121, the middle upper cover plate 122 and the middle lower cover plate 123, and then the sealing is realized by the way of gluing or adhesive tape. The upper sealing sleeve 220 and the lower sealing sleeve 230 are used to seal the positions of the sample 200 and the loading system connected and passing through the environmental box 100, so as to avoid the change of environmental parameters at the positions. The connection of the sample 200 and the loading system refers to the connection of the sample 200 and the clamp assembly 400, and if the sealing at the positions is not good, the environment inside and outside the environmental box 100 will be connected, the environmental parameters in the environmental box 100 will change, the simulation effect on the actual environment will be affected, and the accuracy of the test results will be affected.

[0156] Optionally, the upper sealing sleeve 220 and the lower sealing sleeve 230 are made of a material which is inert to the test environment and has elasticity. The upper sealing sleeve 220 and the lower sealing sleeve 230 can be made of rubber or latex. The test environment cannot corrode the material, and the material has good elasticity. This arrangement can effectively prevent the upper sealing sleeve 220 and the lower sealing sleeve 230 from being corroded by the test medium while ensuring the sealing effect, thereby ensuring the stability of the test environment.

[0157] Specifically, the upper cover assembly 120 comprises end cover plates 121 and middle cover assemblies, the end cover plates 121 are provided with two, respectively arranged at both ends of the upper cover assembly 120, the middle cover assemblies are more than one, the middle cover assemblies are arranged between the two end cover plates 121, the middle cover assemblies comprise middle upper cover plates 122 and middle lower cover plates 123, the middle upper cover plates 122 and the middle lower cover plates 123 form the middle cover assemblies through the bevels 125, the bevels 125 are used for the relative sliding installation of the middle upper cover plates 122 and the middle lower cover plates 123, the upper clamps pass through the holes 124 and are arranged between the end cover plates 121 and the middle upper cover plates 122, and / or the upper clamps pass through the holes 124 and are arranged between the end cover plates 121 and the middle lower cover plates 123, and / or the upper clamps pass through the holes 124 and are arranged between the middle upper cover plates 122 and the middle lower cover plates 123. As one of the embodiments, the end cover plates 121, the middle upper cover plates 122 and the middle lower cover plates 123 are all arranged in a strip shape, more than one first semicircular through holes are arranged on the side of the end cover plates 121 facing the middle cover assemblies along the length direction, the opposite sides of the middle upper cover plates 122 and the middle lower cover plates 123 in each group of middle cover assemblies are provided with bevels 125, the bevels 125 comprise first bevels 1251 and second bevels 1252, the first bevels 1251 and the second bevels 1252 can cooperate to form the bevels 125, so that the middle upper cover plates 122 and the middle lower cover plates 123 cooperate to form a rectangle, the first bevels 1251 are arranged on one of the middle upper cover plates 122 and the middle lower cover plates 123, the second bevels 1252 are arranged on the other of the middle upper cover plates 122 and the middle lower cover plates 123, more than one second semicircular through holes are arranged on the side of the middle upper cover plates 122 and the middle lower cover plates 123 away from the bevels 125 along the length direction, the second semicircular through holes on the side of the middle cover assemblies connected with the end cover plates 121 facing the end cover plates 121 are consistent with the diameter and the number of the first semicircular through holes, the second semicircular through holes between two middle cover assemblies connected with each other are consistent with the diameter and the number of the second semicircular through holes, the second semicircular through holes and the first semicircular through holes or the second semicircular through holes and the second semicircular through holes on another middle cover assembly are oppositely arranged to form the upper clamp passing holes 124.In one of the specific embodiments, the upper middle cover plate 122 is provided with a first inclined surface 1251 on one side away from the end cover plate 121, and more than one second semicircular through hole is provided on the other side along the length direction, the lower middle cover plate 123 is provided with a second inclined surface 1252 on the side facing the upper middle cover plate 122, and more than one second semicircular through hole is provided on the side away from the upper middle cover plate 122 along the length direction, and the number of the second semicircular through holes provided on the two sides can be the same or different, wherein the first inclined surface 1251 is a surface gradually extending in the direction of the lower middle cover plate 123 from bottom to top, and the second inclined surface 1252 is a surface gradually extending in the direction away from the upper middle cover plate 122 from bottom to top, in this case, when installing, after the sample 200 and the upper and lower sealing sleeves 220 and 230 are installed, the end cover plate 121 is installed at the position close to the end of the box body 110, the middle cover assembly is installed between the two end cover plates 121, the lower middle cover plate 123 is first installed in place, then the first inclined surface 1251 of the upper middle cover plate 122 is matched and slid with the second inclined surface 1252 of the lower middle cover plate 123, until the installation of the upper middle cover plate 122 is completed, and after the upper middle cover plate 122 is installed in place, the skirt of the upper sealing sleeve 220 is matched and sealed with the upper surface of the end cover plate 121 and / or the upper middle cover plate 122 and / or the lower middle cover plate 123, because in order to ensure the sealing effect, the outer diameter of the upper sealing sleeve 220 is matched and sealed with the inner surface of the upper clamp through hole 124, and the skirt is additionally provided, which in this case will cause the assembly of the upper cover assembly 120 to be difficult, and the combination assembly of the upper cover assembly 120 can be easily realized through the matching and sliding of the inclined surfaces 125.

[0158] As one of the preferred embodiments, the inclination angle of the inclined surface 125 is 45°-75°. Through the setting of the above-mentioned angle, the upper middle cover plate 122 and the lower middle cover plate 123 can be smoothly installed in place when matched and slid.

[0159] Optionally, the box body 110 and the upper cover assembly 120 are both sandwich structures, the surface in contact with the test environment is made of a material inert to the test environment conditions, and the core is a heat insulation material. It should be noted that the box body 110 and the upper cover assembly 120 can also be made of double-layer composite materials, wherein the surface in contact with the test environment is made of a material inert to the test environment conditions, and the outside is a heat insulation material. Optionally, the inert material of the surface of the box body 110 and the upper cover assembly 120 in contact with the test environment is 316L or other materials not corroded by the test medium, and the core or the outside is a polyurethane material or other heat insulation materials. Through the above-mentioned setting, the corrosion of the box body 110 and the upper cover assembly 120 during use can be avoided, and the influence of the temperature outside the environmental box 100 on the test environment temperature in the cavity thereof can be prevented, thereby ensuring the stability of the test environment and helping to obtain more accurate test results.

[0160] In the present embodiment, one or more liquid inlet pipes 140 and at least one liquid outlet pipe 150 are provided at the lower part of the side wall of the tank 110, the liquid inlet pipes 140 being used to deliver the liquid medium for corrosion test into the chamber, and the liquid outlet pipe 150 being used to discharge the liquid medium in the chamber. By providing the liquid inlet pipes 140 and the liquid outlet pipe 150, a corresponding circulation of the liquid medium in the chamber can be formed to simulate the flow state of seawater. It should be understood that the number of the liquid inlet pipes 140 and the liquid outlet pipe 150 can be adjusted according to the number of the test samples 200 and the size of the tank 110. Preferably, the liquid inlet pipes 140 and the liquid outlet pipe 150 are made of a material that is inert to the environmental conditions of the manufacturing, such as 316L, etc. By the above arrangement, the liquid inlet pipes 140 and the liquid outlet pipe 150 can be prevented from being corroded by the test medium, ensuring the smooth and stable progress of the test. Preferably, the liquid inlet pipes 140 and the liquid outlet pipe 150 are respectively arranged on two opposite side walls of the tank 110. It should be understood that a second pump body 141 is arranged on the liquid inlet pipes 140, the second pump body 141 being a low-pressure variable frequency pump used to adjust the flow rate of the liquid medium for corrosion test delivered into the chamber, and a liquid level control box 151 is arranged on the liquid outlet pipe 150, the liquid level control box 151 being used to adjust the liquid level in the tank 110. The specific structure of the liquid level control box 151 can refer to the prior art, which will not be described here.

[0161] As an embodiment of the present application, one or more gas inlet pipes 160 and at least one gas outlet pipe 170 are provided at the upper part of the side wall of the tank 110, the gas inlet pipes 160 being used to deliver the gas medium for corrosion test into the chamber, and the gas outlet pipe 170 being used to discharge the gas medium in the chamber. By providing the gas inlet pipes 160 and the gas outlet pipe 170, a corresponding circulation of the gas medium in the chamber can be formed to simulate the state of marine air. It should be understood that the number of the gas inlet pipes 160 and the gas outlet pipe 170 can be adjusted according to the number of the test samples 200 and the size of the tank 110. Preferably, the gas inlet pipes 160 and the gas outlet pipe 170 are made of a material that is inert to the environmental conditions of the manufacturing, such as 316L, etc. By the above arrangement, the gas inlet pipes 160 and the gas outlet pipe 170 can be prevented from being corroded by the test medium, ensuring the smooth and stable progress of the test. Preferably, the gas inlet pipes 160 and the gas outlet pipe 170 are respectively arranged on two opposite side walls of the tank 110.

[0162] The environmental box 100 as a test medium container needs to have the functions of sealing, heat preservation and circulating flow. The environmental box 100 is arranged on the base 320, and all the vertical plates are installed on the base 320 in a screw connection manner, so as to facilitate disassembly and assembly. The environmental box 100 is isolated into four independent cavities by the partition plates (which are installed on the bottom plate of the base 320 or the environmental box 100 in a screw connection manner), so as to form a stable environmental medium flow field. Each cavity is provided with liquid medium and gas medium inlet and outlet pipelines. The upper cover assembly 120 is designed as a strip-shaped movable plate with a sample loading hole. After the sample 200 is installed, the upper cover assembly 120 is installed and sealed. The vertical plates of the environmental box 100 and the upper cover assembly 120 can also be a composite structure with a corrosion-resistant steel plate as an inner layer and a heat preservation material as an outer layer. In order to achieve good corrosion protection and sealing, the environmental box bottom plate is covered with a corrosion-resistant rubber pad 325, a corrosion-resistant rubber sleeve is installed on the clamp assembly 400 (as shown in Figure 20 , the corrosion-resistant rubber sleeve includes an upper sealing sleeve 220 and a lower sealing sleeve 230), and the inner layer of the environmental box vertical plate is subjected to relevant corrosion protection treatment. The entire environmental box 100 is well sealed. The volume of the environmental box 100 is about 0.58 m³. It should be noted that the environmental box 100 can be provided with a bottom plate, or can not be provided with a bottom plate. When it is not provided with a bottom plate, the base 320 can be used as a bottom plate (as shown in Figure 2 ).

[0163] Specifically, the first sensing assembly 180 is arranged in the environmental box 100 and is used for detecting the parameters of the liquid medium and / or the gas medium in the environmental box 100. Through the above arrangement, the parameters of the liquid and / or gas medium in the environmental box 100 can be detected in time, so that the test environment is adjusted in time when it does not meet the use conditions, and the accuracy of the test environment is maintained.

[0164] Specifically, the first sensing assembly 180 includes a first liquid temperature sensor 181, a first liquid oxygen content sensor 182, a first gas temperature sensor 183 and a first gas humidity sensor 184. The first liquid temperature sensor 181 is used for detecting the temperature of the liquid medium in the environmental box 100. The first liquid oxygen content sensor 182 is used for detecting the oxygen content of the liquid medium in the environmental box 100. The first gas temperature sensor 183 is used for detecting the temperature of the gas medium in the environmental box 100. The first gas humidity sensor 184 is used for detecting the humidity of the gas medium in the environmental box 100. Optionally, the first sensing assembly 180 can also include a first liquid salinity sensor for detecting the salinity of the liquid in the environmental box 100. Through the arrangement of the first sensing assembly 180, the temperature, oxygen content and other parameters of the liquid medium and the temperature, humidity and other parameters of the gas medium in the environmental box 100 can be monitored in real time. The corrosion fatigue test environment is controlled according to the above parameters, the accuracy and stability of the test environment are ensured, and the accuracy of the test results is improved.

[0165] The aforementioned environmental chamber 100 can only support tests on liquid media at low flow rates. When the liquid media flow rate is high, the anti-corrosion rubber sleeve will not be able to withstand the high pressure brought by the high-flow-rate liquid media. Therefore, when conducting high-flow-rate liquid media tests, a high-speed spray assembly 130 needs to be installed, along with a corresponding flow rate control device, to directly spray the sample 200 outside the anti-corrosion rubber sleeve at high speed (e.g., Figure 21 (As shown).

[0166] Furthermore, the environmental chamber 100 also includes a high-speed jetting assembly 130, which is correspondingly arranged with the sample 200 and used to spray a high-speed test medium onto the surface of the sample 200. The test medium includes a liquid medium and / or a gaseous medium. This arrangement allows for the simultaneous spraying of a high-speed test medium onto the surface of the sample 200 during corrosion testing of marine engineering materials, thereby simulating the operating conditions of a ship and enabling comprehensive corrosion testing of the marine engineering materials. Existing environmental chambers typically only support tests at low flow rates and cannot simulate the operating conditions of a ship, thus hindering comprehensive and effective corrosion testing. It should be noted that the environmental chamber 100 can accommodate multiple samples 200, facilitating batch testing. It should also be noted that the high-speed test medium sprayed by the high-speed jetting assembly 130 has a flow rate of 1-20 m / s.

[0167] As an embodiment of the present invention, such as Figure 19 As shown, the high-speed jet assembly 130 includes a high-pressure mass inlet pipe 131, a high-pressure medium pipe 132, and a high-speed medium nozzle 133. The first end of the high-pressure mass inlet pipe 131 is connected to a medium source outside the environmental chamber 100, and the second end is connected to the high-pressure medium pipe 132, used to transport the test medium provided by the medium source to the high-pressure medium pipe 132. The high-pressure medium pipe 132 is arranged in the chamber. The high-speed medium nozzle 133 is connected to the high-pressure medium pipe 132 and is correspondingly arranged with respect to the sample 200, used to spray the high-pressure test medium at high speed onto the sample 200. The corresponding arrangement of the high-speed medium nozzle 133 with respect to the sample 200 effectively ensures that the surface of the sample 200 receives the high-speed, high-pressure test medium during the test, thereby effectively simulating the working environment of a ship during operation. It should be understood that when the high-pressure inlet pipeline 131 is connected to the liquid medium control device 600, a first pump body 134 is provided on the high-pressure inlet pipeline 131. The first pump body 134 is a high-pressure variable frequency pump, which is used to control the delivery speed and pressure of the high-speed high-pressure liquid medium.

[0168] Optionally, each test sample 200 is provided with one or more high-speed medium nozzles 133. The one or more high-speed medium nozzles 133 help to comprehensively spray the circumferential surface of the test sample 200, and help to obtain comprehensive and complete test results of the marine engineering material corrosion test.

[0169] As an embodiment of the present application, as shown in Figure 19 When the test sample 200 is provided with two or more high-speed medium nozzles 133, the high-speed medium nozzles 133 are uniformly distributed around the circumferential direction of the test sample 200. Preferably, the high-speed medium nozzles 133 are also provided in the vertical direction of the test sample 200. Through the above arrangement, the circumferential surface of the test sample 200 is uniformly sprayed, so that the test results are more accurate. It should be noted that the number and size of the high-speed medium nozzles 133 can be specifically set according to the test requirements, and are not limited here.

[0170] Optionally, the high-speed jetting assembly 130 is made of a material that is inert to the test environmental conditions. The high-pressure medium pipeline 131, the high-pressure medium pipeline 132 and the high-speed medium nozzle 133 are all made of a material that is inert to the test environmental conditions, such as 316L. Through the above arrangement, the high-speed jetting assembly 130 can be prevented from being corroded by the test medium, and the smooth progress of the test is ensured.

[0171] As one of the optional embodiments, the liquid medium control device 600 includes a liquid tank, a liquid temperature control assembly 610, a high-concentration liquid medium tank 620, a water inlet pipe 640 and a second sensing assembly 680. The liquid tank is used to form a cavity for adjusting the parameters of the liquid medium. The liquid temperature control assembly 610 is used to adjust the temperature of the liquid in the liquid tank. The high-concentration liquid medium tank 620 and the water inlet pipe 640 are respectively connected with the liquid tank, and are used to adjust the concentration of the liquid medium in the liquid tank. The liquid tank is connected with the liquid inlet pipeline 140 and / or the high-pressure medium pipeline 131, and is used to deliver the adjusted liquid medium to the environmental tank 100. The second sensing assembly 680 is used to detect the parameters of the liquid medium in the liquid tank. Through the above arrangement, the parameters of the liquid medium in the liquid tank can be adjusted to meet the experimental requirements before being delivered to the environmental tank 100, so that the parameters of the liquid medium are stable and accurate, and the accuracy of the test results is ensured. In addition, the liquid outlet pipeline 150 is connected with the environmental tank 100 at one end and with the liquid tank at the other end, and is used to deliver the liquid medium in the environmental tank 100 to the liquid tank, thereby forming a circulation of the liquid medium.

[0172] Preferably, an overflow pipe 650 is provided on the liquid tank, which is used to control the liquid level in the liquid tank. Since the liquid medium in the environmental chamber 100 will flow back into the liquid tank, it may cause the liquid level in the liquid tank to be too high. The overflow pipe 650 ensures that the liquid level in the liquid tank is always below the overflow pipe 650, avoiding instability caused by excessive liquid level.

[0173] In one embodiment, such as Figure 1 As shown, the liquid temperature control component 610 includes a first electric heating device 611 and a liquid cooling component. The first electric heating device 611 is disposed in the liquid tank and is used to heat the liquid in the liquid tank. The liquid cooling component includes a liquid cooling pipe 612, a third pump body 613, a first heat exchanger 614, a first coolant pipe 615, a first compressor 616, and a first water condenser 617. The third pump body 613 is disposed on the liquid cooling pipe 612. The liquid cooling pipe 612 passes through the first heat exchanger 614, and both ends of the liquid cooling pipe 612 are respectively connected to the liquid tank. The first compressor 616 and the first water condenser 617 are connected to the first heat exchanger 614 through the first coolant pipe 615. The liquid medium in the liquid cooling pipe 612 is cooled by heat exchange with the first coolant in the first coolant pipe 615 in the heat exchanger and then transported back to the liquid tank. Specifically, a first expansion valve is provided between the first water condenser 617 and the first heat exchanger 614. It should be understood that the refrigeration of the first coolant pipeline 615, the first compressor 616, and the first water condenser 617 is achieved in the following manner: The first compressor 616 draws in gaseous first coolant, converts it into a high-temperature, high-pressure gaseous state, and delivers it into the first water condenser 617. The first water condenser 617 exchanges heat with circulating cooling water, converting the high-temperature, high-pressure gaseous first coolant entering the first water condenser 617 into a medium-temperature, high-pressure liquid first coolant. The medium-temperature, high-pressure liquid first coolant is delivered to the first heat exchanger 614 through the first expansion valve, where it vaporizes and transforms into a low-temperature, low-pressure gaseous first coolant. During this process, a large amount of heat is absorbed, thereby cooling the liquid medium in the liquid cooling pipeline 612. After heat exchange, the low-temperature, low-pressure gaseous first coolant is delivered to the first compressor 616, completing the refrigeration cycle of the first coolant. The first electric heating device 611 and the liquid cooling assembly effectively regulate the temperature of the liquid medium in the liquid tank, facilitating the simulation of seawater under various temperature environments and enabling diverse experimental conditions. The liquid cooling pipeline 612, the third pump body 613, the first heat exchanger 614, the first coolant pipeline 615, the first compressor 616, and the first water condenser 617 are all located outside the liquid tank to avoid adversely affecting the liquid temperature inside.

[0174] As one of the preferred embodiments, the liquid medium regulating device 600 further comprises an oxygen generator 630 connected with the liquid tank, for adjusting the oxygen content of the liquid medium in the liquid tank. According to Table 1, the oxygen content of the surface seawater in different sea areas of the world has a large difference, and through the setting of the oxygen generator 630, the oxygen content of the surface seawater in different sea areas can be simulated, so as to more accurately simulate the corrosion fatigue environment, so that the test results are closer to the actual situation, thereby providing more accurate guidance for the corresponding marine engineering design work.

[0175] Specifically, the second sensing assembly 680 comprises a second liquid temperature sensor 681 and a second liquid salinity sensor 682, the second liquid temperature sensor 681 is used for detecting the temperature of the liquid medium in the liquid tank, and the second liquid salinity sensor 682 is used for detecting the salinity of the liquid medium in the liquid tank. Preferably, the second sensing assembly 680 further comprises a second liquid oxygen content sensor 683, which is used for detecting the oxygen content of the liquid medium in the liquid tank. The second liquid temperature sensor 681 is linked and controlled with the liquid temperature regulating assembly 610 to adjust the temperature of the liquid medium in the liquid tank; the second liquid salinity sensor 682 is linked and controlled with the high-concentration liquid medium tank 620 and the water inlet pipe 640 to adjust the salinity of the liquid medium in the liquid tank; the second liquid oxygen content sensor 683 is linked and controlled with the oxygen generator 630 to adjust the oxygen content of the liquid medium in the liquid tank. Through the above setting, the adjustment of the temperature, salinity and oxygen content of the liquid medium is realized, which is convenient for effective simulation of the marine environment.

[0176] As an embodiment of the present application, as Figure 1As shown, the gas medium regulation device 700 comprises a gas tank for forming a cavity for gas medium parameter adjustment, a gas temperature regulation assembly 710 for adjusting the temperature of the gas in the gas tank, a gas humidity regulation assembly for adjusting the humidity of the gas in the gas tank, a fan 740 arranged at the connection between the gas tank and the gas inlet pipeline 160 for sending gas into the gas inlet pipeline 160, and a third sensing assembly 750 for detecting the parameters of the gas medium in the gas tank. Through the above arrangement, the parameters of the gas medium in the gas tank can be adjusted to meet the experimental requirements before being delivered into the environmental chamber 100, so that the gas medium parameters are stable and accurate, thereby ensuring the accuracy of the test results. In addition, one end of the gas outlet pipeline 170 is connected with the environmental chamber 100, and the other end is connected with the gas tank, for delivering the gas medium in the environmental chamber 100 into the gas tank, thereby forming a circulation of the gas medium. Optionally, the fan 740 is a variable frequency fan for adjusting the gas flow rate in the environmental chamber 100.

[0177] As one of the embodiments, as shown in FIG. 6, the environmental chamber 100 comprises a gas medium regulation device 700, a gas inlet pipeline 160, a gas outlet pipeline 170, and a control device 800. The gas medium regulation device 700 is arranged in the environmental chamber 100, and is connected with the gas inlet pipeline 160 and the gas outlet pipeline 170. The gas inlet pipeline 160 is arranged on the environmental chamber 100, and is connected with the gas medium regulation device 700. The gas outlet pipeline 170 is arranged on the environmental chamber 100, and is connected with the gas medium regulation device 700. The control device 800 is arranged in the environmental chamber 100, and is connected with the gas medium regulation device 700. Figure 1As shown, the gas temperature control component 710 includes a second electric heating device 711 and a gas cooling component. The second electric heating device 711 is disposed in the gas chamber and is used to heat the gas in the gas chamber. The gas cooling component includes a second coolant pipeline 712, a second compressor 713, a second water condenser 714, and a second heat exchanger 715. The second heat exchanger 715 is disposed in the gas chamber, and the second compressor 713 and the second water condenser 714 are disposed outside the gas chamber. The second coolant pipeline 712 connects the second compressor 713, the second water condenser 714, and the second heat exchanger 715 to reduce the temperature of the gas medium in the gas chamber. It should be understood that when a four-way valve is provided, the gas cooling component can also heat the gas medium in the gas box, but its efficiency is relatively low. The gas can be heated quickly by using the second electric heating device 711. Specifically, a second expansion valve is also provided between the second water condenser 714 and the second heat exchanger 715. The gas cooling component cools the gas medium in the gas box in the following way: the second compressor 713 draws in the gaseous second coolant and converts it into a high-temperature and high-pressure gaseous state, which is then transported into the second water condenser 714. The second water condenser 714 exchanges heat with the circulating cooling water, converting the high-temperature and high-pressure gaseous second coolant into a medium-temperature and high-pressure liquid second coolant. The medium-temperature and high-pressure liquid second coolant passes through the second expansion valve and is then transported to the second heat exchanger 715, where it vaporizes. During this process, it absorbs a large amount of heat, thereby cooling the gas medium in the gas box. After heat exchange, the low-temperature and low-pressure gaseous second coolant is transported to the second compressor 713 to complete the refrigeration cycle of the second coolant. It should be noted that the first coolant and the second coolant can be the same refrigerant or different refrigerants, and this will not be limited here.

[0178] like Figure 1 As shown, the gas humidity control component includes a humidifier 720 and a pure water tank 730. The humidifier 720 is connected to the gas chamber and is used to regulate the humidity of the gas in the gas chamber. The pure water tank 730 is connected to the humidifier 720 and is used to supply pure water to the humidifier 720. By setting up the gas humidity control component, the humidity of the gas medium in the gas chamber can be effectively regulated, thereby helping to simulate the humid air above the ocean in the environmental chamber 100, improving the accuracy of the corrosion fatigue test environment simulation, and thus improving the accuracy of the test results.

[0179] As one of the optional embodiments, the third sensing assembly 750 includes a second gas temperature sensor 751 for detecting the temperature of the gas medium in the gas tank and a second gas humidity sensor 752 for detecting the humidity of the gas medium in the gas tank. The second gas temperature sensor 751 is in linkage control with the gas temperature regulating assembly 710 for adjusting the temperature of the gas medium in the gas tank, and the second gas temperature sensor 751 is in linkage control with the gas humidity regulating assembly for adjusting the humidity of the gas medium in the gas tank. Through the above arrangement, the adjustment of the temperature and humidity of the gas medium is realized, which facilitates the effective simulation of the air environment above the sea.

[0180] It should be noted that a high-pressure fan (not shown in the figure) can also be arranged in the gas tank, and a corresponding high-pressure gas pipeline is arranged, which extends into the environment tank 100 and is connected with the high-speed medium nozzle 133 in the high-speed jetting assembly 130, for jetting high-speed high-pressure gas to the sample 200. This arrangement facilitates the simulation of the corrosion fatigue environment of marine engineering materials when facing strong winds, or the corrosion fatigue environment of the part above the sea surface when the ship is running at high speed.

[0181] As one of the preferred embodiments, a UV light and / or a xenon lamp (not shown in the figure) is arranged inside the upper cover assembly 120 of the environment tank 100, for simulating the ultraviolet irradiation and / or sunlight irradiation environment. Through the above arrangement, a liquid, gas, and light coupling corrosion fatigue environment can be formed in the environment tank 100, thereby simulating the actual environment in the sea to the greatest extent and improving the accuracy of the test results.

[0182] Specifically, during the test, the first liquid temperature sensor 181 is in linkage control with the liquid temperature regulating assembly 610 for adjusting the temperature of the liquid medium in the environment tank 100, and the second liquid temperature sensor 681 can work or not work; the first liquid oxygen content sensor 182 is in linkage control with the high-concentration liquid medium tank 620 and the water inlet pipe 640 for adjusting the salinity of the liquid medium in the environment tank 100, and the second liquid salinity sensor 682 can work or not work; and / or, the first gas temperature sensor 183 is in linkage control with the gas temperature regulating assembly 710 for adjusting the temperature of the gas medium in the environment tank 100, and the first gas humidity sensor 184 is in linkage control with the gas humidity regulating assembly for adjusting the humidity of the gas medium in the environment tank 100.

[0183] The embodiment provides a high-throughput corrosion test method for marine engineering materials, which is used for the test system as described above.

[0184] The test method includes:

[0185] Step S1: clamping the sample: according to the test requirements, the corresponding number of samples is assembled into the environmental box, and the sample is connected with the loading system;

[0186] Step S2: selecting the test environment type;

[0187] Step S3: setting the target parameters of the corresponding medium in the environmental box corresponding to the selected test environment type in step S2, the medium being a liquid medium and / or a gas medium, the parameters of the liquid medium at least including temperature, salinity, flow rate and liquid level height in the environmental box; the parameters of the gas medium at least including temperature, humidity and circulation speed; preferably, the parameters of the liquid medium further include oxygen content; it should be understood that the target parameters set in step S3 can be specific values or value ranges, which are not limited here;

[0188] Step S4: starting the liquid medium control device to adjust the parameters of the liquid medium therein to meet the requirements, and / or starting the gas medium control device to adjust the parameters of the gas medium therein to meet the requirements;

[0189] Step S5: connecting the liquid medium control device and / or the gas medium control device with the environmental box, inputting the liquid medium and / or the gas medium into the environmental box, adjusting the input rate of the liquid medium and / or the gas medium according to the flow rate requirement of the liquid medium and / or the circulation speed requirement of the gas medium, and adjusting the parameters of the liquid medium and / or the gas medium according to the current parameter values of the liquid medium and / or the gas medium in the environmental box;

[0190] Wherein, after any one of steps S1-S5, the following steps are further included:

[0191] Step S6: starting the loading system to apply load to the sample.

[0192] Through the above settings, batch corrosion fatigue tests of multiple samples can be carried out in one test cycle, and the comprehensive coordination of different environments, loads and other factors is also realized, which improves the test efficiency and ensures the consistency of the environment of the sample 200 in batch tests, which is helpful for the change of the corrosion fatigue performance of marine engineering materials under the same environment and different loads, and has important guiding significance for the research and application of marine engineering materials.

[0193] Wherein, step S1 includes:

[0194] Step S11: assembling the clamp assembly with the loading support, the loading device and the sample to set the sample into the environmental box.

[0195] Specifically, step S11 includes:

[0196] Step S111: Fixing the positioning block on the corresponding position of the base 320;

[0197] Step S112: Positioning the V-shaped protrusion on the fourth clamp with the V-shaped groove on the positioning block;

[0198] Step S113: Using the fifth clamp to fix the fourth clamp on the base through threaded fastening;

[0199] Step S114: Setting the first clamp in the second clamp, and threadedly connecting the second clamp with the fourth clamp;

[0200] Step S115: Threadedly fixing the lower end of the sample with the first clamp in step S114;

[0201] Step S116: Setting another second clamp on the upper end of the sample;

[0202] Step S117: Threadedly fixing another first clamp on the upper end of the sample;

[0203] Step S118: Threadedly fixing the second clamp on the upper end of the sample with the third clamp;

[0204] Step S119: Fixing the loading device with the third clamp.

[0205] It should be understood that between steps S115 and S116, the upper sealing sleeve 220 needs to be arranged on the upper end of the sample, and the lower sealing sleeve 230 needs to be arranged on the lower end of the sample. After installation is completed, corresponding fasteners are arranged on the outer periphery of the upper sealing sleeve 220 and the lower sealing sleeve 230 to ensure sealing performance.

[0206] The optional experimental environment types in step S2 include at least:

[0207] Seawater scouring environment: In this environment, the environment box is in a mixed state of liquid medium and gas medium, and in addition, high-speed test medium is sprayed to the sample, and the sprayed test medium includes liquid medium and / or gas medium; this setting facilitates the simulation of a seawater or air rapid scouring environment, such as a corrosion fatigue environment faced during a strong wind, heavy rain, or high-speed sailing of a ship; in this environment, the gas medium control device 700 and the liquid medium control device 600 work simultaneously, and the high-speed spraying assembly 130 works to spray high-speed liquid medium and / or gas medium to the sample 200. In this process, the liquid level of the environment box 100 is lower than the position of the high-speed medium nozzle 133 in the high-speed spraying assembly 130.

[0208] In addition, the optional test environment types in step S2 include:

[0209] Sea water immersion environment: in this environment type, the inlet and outlet pipelines of the environmental chamber are filled with liquid medium below a certain height; this environment is used for long-term immersion of the sample to simulate the corrosion fatigue environment of the engineering material under the sea level for a long time; it should be understood that the inlet and outlet pipelines of the environmental chamber are higher than the upper end of the parallel section of the sample to ensure that the test section of the sample can be completely immersed in the liquid medium; in this environment, the gas medium regulating device 700 does not work, and the liquid medium regulating device 600 works to maintain the liquid medium level and corresponding temperature, salinity, oxygen content and other parameters in the environmental chamber 100 within the required range;

[0210] Above sea level atmospheric environment: in this environment, there is no liquid medium in the environmental chamber or the liquid medium is discharged to a position below the parallel section of the sample; this setting makes the parallel section of the sample completely in the air medium, which is convenient for studying the influence of the air environment above the sea level on the corrosion fatigue performance of the marine engineering material; in this environment, the liquid medium regulating device 600 does not work, and the gas medium regulating device 700 works to maintain the temperature, humidity and other parameters of the gas medium in the environmental chamber 100 within the required range;

[0211] Sea surface environment: in this environment, the lower half of the environmental chamber is liquid medium, and the upper half is gas medium, and the interface of the liquid medium and the gas medium is close to the middle position of the parallel section of the sample; it should be understood that this environment is used to simulate the corrosion fatigue environment of the engineering material which is partially located above the sea level and partially located in the sea water, therefore, the sample is located at the waterline position to improve the accuracy of the test results;

[0212] Mixed marine environment: in this environment, the environmental state in the environmental chamber is replaced by two or more of the sea water immersion environment, the above sea level atmospheric environment, the sea surface environment and the sea water scouring environment.

[0213] Through the above settings, the simulation of gas and / or liquid state in various environments in the ocean can be realized, so that the test environment is more close to the actual environment, and the test results are closer to the true situation, which provides more accurate guidance for the research and development and actual application of marine engineering materials.

[0214] It should be noted that, as for the parameter setting in step S3, a corresponding parameter setting module is provided in the control module of the system, and the operator sets all or part of the parameters through the parameter setting module, and / or, the environmental parameter data corresponding to the global marine environment is pre-stored in the control module of the system, and when the liquid medium and / or gas medium parameters are set in step S3, the operator selects the corresponding simulation area (such as the marine area determined according to the latitude and longitude), the corresponding season and weather condition, etc. according to the needs, that is, all or part of the liquid medium and / or gas medium parameters or parameter ranges can be automatically matched, and the operator can modify or add or subtract the parameters on this basis. The setting can directly call the pre-existing parameters in the database, so that the operator can directly obtain the parameters or parameter ranges of the liquid medium and / or gas medium corresponding to the marine environment in any area, so as to more specifically set the corresponding test parameters, so as to obtain the test results closer to the real environment.

[0215] In step S4, the parameter adjustment of the liquid medium includes the following steps:

[0216] Step S41: detecting the current parameter value of the liquid medium in the liquid tank; the current parameter value at least includes the current liquid temperature, the current salinity, and optionally includes the current oxygen content;

[0217] Step S42: comparing the current parameter value obtained in step S41 with the set requirement of the liquid medium parameter set in step S3, when one or more of the current parameter values do not meet the set requirement of step S3, executing step S43: when all the parameters of the liquid medium meet the set of step S3, executing step S47;

[0218] Step S43: when the temperature of the liquid medium does not meet the set requirement of step S3: executing step S44; when the salinity of the liquid medium does not meet the set requirement of step S3, executing step S45; when the oxygen content of the liquid medium does not meet the set requirement of step S3, executing step S46;

[0219] Step S44: adjusting the temperature of the liquid medium according to the size relationship between the current liquid temperature value and the set requirement through the first electric heating device or the liquid cooling component, and then executing step S41;

[0220] Step S45: adjusting the salinity of the liquid medium according to the size relationship between the current salinity and the set requirement through the high-concentration liquid medium tank or the water inlet pipe, and then executing step S41;

[0221] Step S46: adjusting the oxygen content of the liquid medium according to the size relationship between the current oxygen content and the set requirement through the oxygen generator, and then executing step S41;

[0222] Step S47: issuing a prompt indicating that the parameters of the liquid medium are adjusted to meet the target parameters set in step S3;

[0223] Wherein, the setting requirement of the liquid medium parameters set in step S3 is: D-ΔD≤A≤D+ΔD, E-ΔE≤B≤E+ΔE, C≥F, A is the current liquid temperature value of the liquid medium in the liquid tank, B is the current salinity value of the liquid medium in the liquid tank, C is the current oxygen content of the liquid medium in the liquid tank, D is the target temperature of the liquid medium, ΔD is the allowed liquid deviation temperature, E is the target salinity of the liquid medium, ΔE is the allowed liquid deviation salinity, F is the target oxygen content of the liquid medium, D, ΔD, E, ΔE, F are all pre-set in step S3. Through the above setting, the parameters of the liquid medium are adjusted to meet the required state before being delivered to the environmental chamber 100, so as to ensure the accuracy of the test results. It should be understood that when the parameters are adjusted, other parameters will inevitably change, therefore, in step S43, the parameters that do not meet the setting requirement are adjusted according to one or more of steps S44, S45, S46, and the parameters that meet the setting requirement are temporarily not adjusted, and after the parameters that do not meet the setting requirement are adjusted, all parameters are detected and judged again, and then targeted adjustment is performed, so as to effectively control the influence of parameter adjustment on other parameters, and ensure that all parameters meet the setting requirement before step S47 is executed. It should be noted that the comparison in step S42 is one-to-one comparison.

[0224] Specifically, step S44 specifically includes:

[0225] determining that the current liquid temperature does not meet the setting requirement:

[0226] When A<D-ΔD, start the first electric heating device to heat the liquid medium, and when the temperature of the liquid medium meets the setting requirement, close the first electric heating device and execute step S41;

[0227] When A>D+ΔD, start the liquid cooling assembly to cool the liquid medium, and when the temperature of the liquid medium meets the setting requirement, close the liquid cooling assembly and execute step S41;

[0228] Through the above setting, the liquid medium meets the setting requirement in the environmental chamber 100 before participating in the cycle, and the accuracy of the test environment liquid temperature is ensured.

[0229] Step S45 specifically includes:

[0230] determining that the current salinity does not meet the setting requirement:

[0231] When B<E-ΔE, the high-concentration liquid medium tank is connected with the liquid tank, the high-concentration liquid medium is injected into the liquid tank to increase the salinity, and when the salinity of the liquid medium meets the set requirement, the high-concentration liquid medium tank is disconnected from the liquid tank, and step S41 is executed.

[0232] When B>E+ΔE, the water inlet pipe is connected with the liquid tank, water is injected into the liquid tank to reduce the salinity, and when the salinity of the liquid medium meets the set requirement, the water inlet pipe is disconnected from the liquid tank, and step S41 is executed.

[0233] Through the above setting, the liquid medium meets the set requirement in the environmental tank 100 before participating in the circulation, and the accuracy of the test environment salinity is ensured.

[0234] Specifically, step S46 includes the following steps.

[0235] The oxygen generator is started to increase the oxygen content in the liquid tank, and when the oxygen content of the liquid medium meets the set requirement, the oxygen generator is turned off, and step S41 is executed.

[0236] Through the above setting, the liquid medium meets the set requirement in the environmental tank 100 before participating in the circulation, and the accuracy of the test environment salinity is ensured.

[0237] Specifically, in step S4, the parameter adjustment of the gas medium includes the following steps.

[0238] Step S41': detecting the current parameter value of the gas medium in the gas tank; the current parameter value at least includes the current gas temperature, the current gas humidity;

[0239] Step S42': comparing the current parameter value obtained in step S41' with the set requirement of the gas medium parameter set in step S3, when one or more of the current parameter values do not meet the set requirement of step S3, step S43' is executed: when all parameters of the gas medium meet the set of step S3, step S46' is executed.

[0240] Step S43': when the temperature of the gas medium does not meet the set requirement of step S3: step S44' is executed; when the humidity of the gas medium does not meet the set requirement of step S3, step S45' is executed.

[0241] Step S44': according to the size relationship between the current gas temperature value and the set requirement, the gas medium temperature is adjusted through the first electric heating device or the gas cooling assembly, and then step S41' is executed.

[0242] Step S45': according to the size relationship between the current humidity and the set requirement, the humidity of the gas medium is adjusted through the high-concentration gas medium tank or the water inlet pipe, and then step S41' is executed.

[0243] Step S46': issuing a prompt indicating that the parameters of the gaseous medium are adjusted to meet the target parameters set in step S3;

[0244] Wherein, the setting requirement of the gaseous medium parameters set in step S3 is: M-ΔM≤J≤M+ΔM, K≥N, J is the current gaseous temperature value of the gaseous medium in the gas tank, K is the current humidity value of the gaseous medium in the gas tank, M is the target temperature of the gaseous medium, ΔM is the allowable gaseous deviation temperature, N is the target humidity of the gaseous medium, M, ΔM, N are all pre-set in step S3. Through the above setting, the parameters of the gaseous medium are adjusted to meet the requirement before it is delivered to the environmental chamber 100, so as to ensure the accuracy of the test results. It should be understood that when the parameters are adjusted, other parameters will inevitably change, therefore, in step S43', the parameters that do not meet the setting requirement are adjusted according to one or both of step S44' and step S45', and the parameters that meet the setting requirement are not adjusted temporarily, and after the parameters that do not meet the setting requirement are adjusted, all the parameters are detected and judged again, and then adjusted accordingly, so as to effectively control the influence of the parameter adjustment on other parameters, and ensure that all the parameters meet the setting requirement before step S46' is executed. It should be noted that the comparison in step S42' is one-to-one comparison.

[0245] Specifically, step S44' specifically includes:

[0246] determining that the current gaseous temperature does not meet the setting requirement:

[0247] when J

[0248] when J>M+ΔM, starting the gaseous cooling assembly to cool the gaseous medium, and when the temperature of the gaseous medium meets the setting requirement, closing the gaseous cooling assembly and executing step S41'.

[0249] Through the above setting, the gaseous medium meets the setting requirement in the environmental chamber 100 before participating in the circulation, so as to ensure the accuracy of the test environment gaseous temperature.

[0250] Wherein, step S45' specifically includes:

[0251] starting the humidifier to humidify the gas tank, and when the humidity of the gaseous medium meets the setting requirement, closing the humidifier and executing step S41'.

[0252] Through the above setting, the gaseous medium meets the setting requirement in the environmental chamber 100 before participating in the circulation, so as to ensure the accuracy of the test environment gaseous humidity.

[0253] As one of the optional embodiments, in step S5, adjusting the parameters of the liquid medium according to the current parameter detection value of the liquid medium in the environment tank includes the following steps:

[0254] Step S51: detecting the current parameter value of the liquid medium in the environment tank, including the current liquid temperature P, the current liquid salinity Q, and the current oxygen content R;

[0255] Step S52: comparing the detected current parameter value with the set requirements of the liquid medium parameters set in step S3 one by one, and performing corresponding operations according to the corresponding parameter types, wherein the comparison of the current liquid temperature performs step S53; the comparison of the current salinity performs step S54; and the comparison of the current oxygen content performs step S55;

[0256] Step S53: comparing the current liquid temperature P with the liquid temperature set requirement, and performing the following operations according to the comparison result:

[0257] When P < D - ΔD, start the first electric heating device to heat the liquid medium, when the temperature of the liquid medium meets the set requirement, close the first electric heating device, and execute step S51;

[0258] When P > D + ΔD, start the liquid cooling assembly to cool the liquid medium, when the temperature of the liquid medium meets the set requirement, close the liquid cooling assembly, and execute step S51;

[0259] When D - ΔD ≤ P ≤ D + ΔD, the first electric heating device and the liquid cooling assembly remain closed, and step S51 is executed;

[0260] Step S54: comparing the current salinity Q with the liquid salinity set requirement, and performing the following operations according to the comparison result:

[0261] When Q < E - ΔE, connect the high-concentration liquid medium tank to the liquid tank, inject high-concentration liquid medium into the liquid tank to increase the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the high-concentration liquid medium tank from the liquid tank, and execute step S51;

[0262] When Q > E + ΔE, connect the water inlet pipe to the liquid tank, inject water into the liquid tank to reduce the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the water inlet pipe from the liquid tank, and execute step S51;

[0263] When E - ΔE ≤ Q ≤ E + ΔE, the high-concentration liquid medium tank and the water inlet pipe remain disconnected from the liquid tank, and step S51 is executed;

[0264] Step S55 includes: comparing the current oxygen content R with the oxygen content set requirement, and performing the following operations according to the comparison result:

[0265] When R<F, oxygen generator is started to increase oxygen in liquid tank, when oxygen content of liquid medium meets the set requirement, oxygen generator is closed, and step S51 is executed;

[0266] When R≥F, oxygen generator keeps closed, and step S51 is executed.

[0267] Through the above setting, the temperature, salinity and oxygen content of the liquid medium entering the environment tank 100 can be adjusted by the liquid medium regulating device 600, so that the corresponding parameters of the liquid medium in the environment tank 100 are maintained within the set requirements, to ensure the accuracy of the test results.

[0268] Specifically, in step S5, adjusting the parameters of the gaseous medium according to the current parameter detection value of the gaseous medium in the environment tank includes the following steps:

[0269] Step S51': detecting the current parameter value of the gaseous medium in the environment tank, including the current gaseous temperature T and the current oxygen content U of the environment tank;

[0270] Step S52': comparing the current parameter value obtained by detection with the set requirement of the gaseous medium parameter set in step S3 one by one, and performing corresponding operation according to the corresponding parameter type, wherein the comparison of the current gaseous temperature is executed in step S53'; the comparison of the current oxygen content is executed in step S54';

[0271] Step S53': comparing the current gaseous temperature T with the gaseous temperature set requirement, and performing the following operation according to the comparison result:

[0272] When T

[0273] When T>M+ΔM, the gaseous cooling assembly is started to cool the gaseous medium, when the temperature of the gaseous medium meets the set requirement, the gaseous cooling assembly is closed, and step S51' is executed;

[0274] When M-ΔM≤T≤M+ΔM, the second electric heating device and the gaseous cooling assembly keep closed, and step S51' is executed;

[0275] Wherein, step S54' includes: comparing the current humidity U with the humidity set requirement, and performing the following operation according to the comparison result:

[0276] When U

[0277] When U≥N, the humidifier keeps closed, and step S51' is executed.

[0278] Through the above setting, the temperature and humidity of the gaseous medium entering the environmental box 100 can be adjusted by the gaseous medium regulating device 700, so that the corresponding parameters of the gaseous medium in the environmental box 100 are maintained within the set requirements, to ensure the accuracy of the test results.

[0279] Specifically, step S6 includes:

[0280] The loading device applies a force load to each test sample relatively independently according to the test requirements, and the force load includes a slow strain rate tensile load and / or a cyclic load.

[0281] Through the above setting, the same or fixed force load can be applied to different test samples 200 during the test, so that tests under multiple loading states can be performed in one test cycle, which is helpful for the research on corrosion fatigue performance under different loading states in the same environmental state.

[0282] In addition, during the test, the flow rate of the liquid medium in the environmental box 100 is controlled by the second pump body 141, the flow rate of the high-speed sprayed liquid medium is controlled by the first pump body 134, the circulation speed of the gaseous medium is controlled by the fan 740, the flow rate and pressure of the high-speed sprayed gas are controlled by the high-pressure fan, and the liquid level in the environmental box 100 is controlled by the liquid level control box 151, which will not be described here.

[0283] It should be noted that the corresponding control of the start, stop, connection, disconnection and other actions of the respective components in the present application can be performed by PLC and valves, which will not be described here.

[0284] It should be noted that all the directional and positional terms in the present application, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "low", "tail end", "head end", "center", etc., are only used to explain the relative positional relationship, connection condition, etc. between the components in a certain state, and are only for the convenience of describing the present application, and do not require the present application to be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the present application. In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of indicated technical features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme.

[0285] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0286] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A method for high-throughput corrosion testing of marine engineering materials for a high-throughput corrosion testing system for marine engineering materials, characterized by, The marine engineering material high-throughput corrosion test system comprises a loading system and an environment system, the loading system is used for independently applying corresponding force load to each sample (200) according to the set test parameter requirements, and the environment system comprises an environment box (100), a liquid medium regulating device (600) and a gas medium regulating device (700), the environment box (100) is used for placing the sample (200) and can be loaded with a test liquid medium and a gas medium; the liquid medium regulating device (600) is used for regulating the technical parameters of the test liquid medium and conveying the liquid medium into the environment box (100), and the gas medium regulating device (700) is used for regulating the technical parameters of the test gas medium and conveying the gas medium into the environment box (100); The test method comprises: Step S1: clamping the sample: according to the test requirements, a corresponding number of samples are assembled into the environment box, and the sample is connected with the loading system; Step S2: selecting the test environment type; Step S3: setting the target parameters of the corresponding medium in the environment box corresponding to the test environment type selected in step S2, the medium being a liquid medium and / or a gas medium, the parameters of the liquid medium at least comprising temperature, salinity, flow rate and liquid level height in the environment box; The parameters of the gas medium at least comprising temperature, humidity and circulation speed; Step S4: starting the liquid medium regulating device, adjusting the parameters of the liquid medium therein to meet the requirements, and / or starting the gas medium regulating device, adjusting the parameters of the gas medium therein to meet the requirements; Step S5: connecting the liquid medium regulating device and / or the gas medium regulating device with the environment box, inputting the liquid medium and / or the gas medium into the environment box, adjusting the input rate of the liquid medium and / or the gas medium according to the flow rate requirement of the liquid medium and / or the circulation speed requirement of the gas medium, and adjusting the parameters of the liquid medium and / or the gas medium according to the current parameter values of the liquid medium and / or the gas medium in the environment box; Wherein, after any one of steps S1-S5, the following step is further included: Step S6: starting the loading system to apply load to the sample; The liquid medium regulating device (600) comprises a liquid tank, a liquid temperature regulating assembly (610), a high-concentration liquid medium tank (620) and a water inlet pipe (640), the liquid temperature regulating assembly (610) comprising a first electric heating device (611) and a liquid cooling assembly; In step S4, the parameter adjustment of the liquid medium comprises the following steps: Step S41: detecting the current parameter values of the liquid medium in the liquid tank, the current parameter values at least comprising current liquid temperature and current salinity; Step S42: comparing the current parameter values obtained in step S41 with the set requirements of the liquid medium parameters in step S3, when one or more of the current parameter values do not meet the set requirements in step S3, step S43 is performed: when all the parameters of the liquid medium meet the settings in step S3, step S47 is performed; Step S43: adjusting the parameters of the liquid medium to meet the requirements in step S3; Step S43: When the temperature of the liquid medium does not meet the set requirement of step S3: execute step S44; when the salinity of the liquid medium does not meet the set requirement of step S3, execute step S45; Step S44: Determine the state that the current liquid temperature does not meet the set requirement: When A < D-ΔD, start the first electric heating device to heat the liquid medium, when the temperature of the liquid medium meets the set requirement, close the first electric heating device, and execute step S41; When A > D+ΔD, start the liquid cooling assembly to cool the liquid medium, when the temperature of the liquid medium meets the set requirement, close the liquid cooling assembly, and execute step S41; Step S45: Determine the state that the current salinity does not meet the set requirement: When B < E-ΔE, connect the high-concentration liquid medium tank with the liquid tank, inject high-concentration liquid medium into the liquid tank to increase the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the high-concentration liquid medium tank from the liquid tank, and execute step S41; When B > E+ΔE, connect the water inlet pipe with the liquid tank, inject water into the liquid tank to reduce the salinity, when the salinity of the liquid medium meets the set requirement, disconnect the water inlet pipe from the liquid tank, and execute step S41; Step S47: Issue a prompt indicating that the parameters of the liquid medium are adjusted to meet the target parameters set in step S3; Wherein, the set requirement of the liquid medium parameters set in step S3 is: D-ΔD≤A≤D+ΔD, E-ΔE≤B≤E+ΔE, A is the current liquid temperature value of the liquid medium in the liquid tank, B is the current salinity value of the liquid medium in the liquid tank, D is the target temperature of the liquid medium, ΔD is the allowed liquid deviation temperature, E is the target salinity of the liquid medium, ΔE is the allowed liquid deviation salinity, D, ΔD, E, ΔE are all pre-set in step S3.

2. The high-throughput corrosion testing method of an offshore engineering material according to claim 1, wherein, A high-speed jetting assembly (130) is arranged in the environmental tank (100), the high-speed jetting assembly (130) is arranged corresponding to the sample (200), and the high-speed jetting assembly (130) is connected with the liquid medium regulating device (600) and / or the gas medium regulating device (700), for jetting high-speed test medium to the surface of the sample (200), the test medium includes liquid medium and / or gas medium; The optional test environment types in step S2 at least include: Sea water scouring environment: in this environment, the liquid medium and the gas medium exist in a mixed state in the environmental tank, in addition, high-speed test medium is jetted to the sample, and the jetted test medium includes liquid medium and / or gas medium.

3. The high-throughput corrosion testing method of a marine engineering material according to claim 2, wherein, The optional test environment types in step S2 at least include: Sea water immersion environment: in this environment type, the liquid medium fills the height below the gas inlet pipeline and the gas outlet pipeline in the environmental tank; this environment is used for long-term immersion of the sample, so as to simulate the corrosion fatigue environment of the engineering material under the sea level for a long time; Sea surface above atmospheric environment: in this environment, there is no liquid medium in the environmental box or the liquid medium is discharged to the position below the sample parallel section; sea surface environment: in this environment, the lower half of the environmental box is a liquid medium, and the upper half is a gas medium, and the interface of the liquid medium and the gas medium is close to the middle position of the sample parallel section; Mixed marine environment: in this environment, the environmental state in the environmental box adopts two or more of the sea water immersion environment, the sea surface above atmospheric environment, the sea surface environment, and the sea water scouring environment.

4. The high-throughput corrosion testing method of a marine engineering material according to claim 1, wherein, The liquid medium regulating device (600) further comprises an oxygen generator (630); in step S3, the parameters of the liquid medium further include oxygen content, Then step S41 further comprises: detecting the current oxygen content of the liquid medium; Step S43 further comprises: when the oxygen content of the liquid medium does not meet the set requirement of step S3, executing step S46; Step S46: starting the oxygen generator to increase the oxygen content in the liquid tank, and when the oxygen content of the liquid medium meets the set requirement, closing the oxygen generator and executing step S41; In step S3, the set requirement of the liquid medium parameters further comprises: C≥F, C is the current oxygen content of the liquid medium in the liquid tank, and F is the target oxygen content of the liquid medium, which is set in step S3.

5. The high-throughput corrosion testing method of a marine engineering material according to claim 1, wherein, The gas medium regulating device (700) comprises a gas tank, a gas temperature regulating component (710), and a gas humidity regulating component, the gas temperature regulating component (710) comprises a second electric heating device (711) and a gas cooling component, the gas humidity regulating component comprises a humidifier (720), and in step S4, the parameter adjustment of the gas medium comprises the following steps: Step S41': detecting the current parameter value of the gas medium in the gas tank; the current parameter value at least includes the current gas temperature and the current gas humidity; Step S42': comparing the current parameter value obtained in step S41' with the set requirement of the gas medium parameters in step S3, when one or more of the current parameter values do not meet the set requirement of step S3, executing step S43': when all the parameters of the gas medium meet the set requirement of step S3, executing step S46'; Step S43': when the temperature of the gas medium does not meet the set requirement of step S3: executing step S44'; when the humidity of the gas medium does not meet the set requirement of step S3, executing step S45'; Step S44': judging the state that the current gas temperature does not meet the set requirement: When J When J Step S45': starting the humidifier to humidify the gas tank, and when the humidity of the gas medium meets the set requirement, closing the humidifier and executing step S41'; Step S46': issuing a prompt that the parameter adjustment of the gas medium meets the target parameter set in step S3. The setting requirement of the gas medium parameter set in step S3 is: M-ΔM≤J≤M+ΔM, K≥N, J is the current gas temperature value of the gas medium in the gas tank, K is the current humidity value of the gas medium in the gas tank, M is the target temperature of the gas medium, ΔM is the allowed gas deviation temperature, N is the target humidity of the gas medium, and M, ΔM and N are all pre-set in step S3.

6. The high-throughput corrosion testing method of a marine engineering material according to claim 1, wherein, The liquid medium regulating device (600) comprises a liquid tank, a liquid temperature regulating component (610), a high-concentration liquid medium tank (620) and a water inlet pipe (640). The liquid temperature regulating component (610) comprises a first electric heating device (611) and a liquid cooling component. In step S5, the parameter adjustment of the liquid medium according to the current parameter detection value of the liquid medium in the environment tank comprises the following steps: Step S51: detecting the current parameter value of the liquid medium in the environment tank, including the current liquid temperature P and the current liquid salinity Q of the environment tank; Step S52: comparing the current parameter value obtained by detection with the setting requirement of the liquid medium parameter set in step S3 one by one, and performing corresponding operations according to the corresponding parameter types, wherein the comparison of the current liquid temperature performs step S53, and the comparison of the current salinity performs step S54; Step S53: comparing the current liquid temperature P with the liquid temperature setting requirement, and performing the following operations according to the comparison result: When P<D-ΔD, the first electric heating device is started to heat the liquid medium, when the temperature of the liquid medium meets the setting requirement, the first electric heating device is turned off, and step S51 is performed; When P>D+ΔD, the liquid cooling component is started to cool the liquid medium, when the temperature of the liquid medium meets the setting requirement, the liquid cooling component is turned off, and step S51 is performed; When D-ΔD≤P≤D+ΔD, the first electric heating device and the liquid cooling component remain off, and step S51 is performed; Step S54: comparing the current salinity Q with the liquid salinity setting requirement, and performing the following operations according to the comparison result: When Q<E-ΔE, the high-concentration liquid medium tank is connected to the liquid tank, high-concentration liquid medium is injected into the liquid tank to increase the salinity, when the salinity of the liquid medium meets the setting requirement, the high-concentration liquid medium tank is disconnected from the liquid tank, and step S51 is performed; When Q>E+ΔE, the water inlet pipe is connected to the liquid tank, water is injected into the liquid tank to reduce the salinity, when the salinity of the liquid medium meets the setting requirement, the water inlet pipe is disconnected from the liquid tank, and step S51 is performed; When E-ΔE≤Q≤E+ΔE, the high-concentration liquid medium tank and the water inlet pipe remain disconnected from the liquid tank, and step S51 is performed.

7. The high-throughput corrosion testing method of a marine engineering material according to claim 6, wherein, The liquid medium regulating device (600) further comprises an oxygen generator (630), and in step S3, the parameter of the liquid medium further comprises oxygen content, Step S51 further comprises: detecting the current oxygen content R of the liquid medium in the environment tank; Step S52 further comprises: the comparison of the current oxygen content performs step S55; Step S55: comparing the current oxygen content R with the oxygen content setting requirement, and performing the following operations according to the comparison result: When R < F, the oxygen generator is started to increase the oxygen in the liquid tank, and when the oxygen content of the liquid medium meets the set requirement, the oxygen generator is closed, and step S51 is executed. When R ≥ F, the oxygen generator remains in the closed state, and step S51 is executed.

8. The high-throughput corrosion testing method of a marine engineering material according to claim 1 or 7, wherein, The gas medium regulation device (700) comprises a gas tank, a gas temperature regulation assembly (710), and a gas humidity regulation assembly, the gas temperature regulation assembly (710) comprises a second electric heating device (711) and a gas cooling assembly, and the gas humidity regulation assembly comprises a humidifier (720); in step S5, adjusting the parameters of the gas medium according to the current parameter detection value of the gas medium in the environment tank comprises the following steps: Step S51': detecting the current parameter value of the gas medium in the environment tank, including the current gas temperature T and the current oxygen content U of the environment tank; Step S52': comparing the current parameter value obtained by detection with the set requirement of the gas medium parameters set in step S3 one by one, and performing corresponding operations according to the corresponding parameter types, wherein the comparison of the current gas temperature performs step S53'; the comparison of the current oxygen content performs step S54'; Step S53': comparing the current gas temperature T with the gas temperature set requirement, and performing the following operations according to the comparison result: When T < M-ΔM, the second electric heating device is started to heat the gas medium, and when the temperature of the gas medium meets the set requirement, the second electric heating device is closed, and step S51' is executed; When T > M+ΔM, the gas cooling assembly is started to cool the gas medium, and when the temperature of the gas medium meets the set requirement, the gas cooling assembly is closed, and step S51' is executed; When M-ΔM≤T≤M+ΔM, the second electric heating device and the gas cooling assembly remain closed, and step S51' is executed; Step S54' comprises: comparing the current humidity U with the humidity set requirement, and performing the following operations according to the comparison result: When U < N, the humidifier is started to humidify the gas tank, and when the humidity of the gas medium meets the set requirement, the humidifier is closed, and step S51' is executed; When U ≥ N, the humidifier remains in the closed state, and step S51' is executed.

9. A high-throughput corrosion testing system for marine engineering materials, characterized in that, The high-throughput corrosion test method of the marine engineering material according to any one of claims 1-8 is adopted.

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