Corrosion testing device as well as control method and use method thereof

Abstract

The invention provides a corrosion testing device and a control method and a use method thereof, the corrosion testing device comprises: a reaction device, the interior of which is provided with a closed reaction chamber, the reaction chamber is internally provided with a mounting structure, the mounting structure is used for fixing a tested sample in the reaction chamber, and the reaction device is provided with an opening and a cover body capable of closing the opening; the gas supply device is communicated with the reaction cavity and is used for introducing protective gas, corrosive gas and erosion particles into the reaction cavity; the heating device is used for heating gas in the reaction cavity; the fan is located in the reaction cavity, and the material of at least part of the fan is the same as that of the sample; the motor is connected with the fan and used for driving the fan to rotate. The corrosion testing device can simulate both low-speed erosion and high-speed erosion.

Description

Technical Field

[0001] The invention relates to the field of corrosion testing, and in particular to a corrosion testing device, a control method thereof and a use method thereof. Background Art

[0002] In engineering practice, some structures need to work in a corrosive gas environment. At the same time, the structure may also be affected by high temperature or coupled erosion. In order to avoid failure of the structure during operation, it is necessary to use a corrosion test device to determine the service life of the structure under different corrosion conditions, thereby determining the replacement cycle of the structure. The relevant corrosion test device is difficult to simulate both high-speed erosion and low-speed erosion in the simulation of the coupled corrosion and erosion scenario. Summary of the invention

[0003] The present invention provides a corrosion testing device and a control method thereof and a use method thereof, which are used to solve the problem of how to achieve the simulation of high-speed erosion and low-speed erosion in a scenario of simulating the coupling of corrosion and erosion.

[0004] A first aspect of an embodiment of the present invention provides a corrosion testing device, which includes: a reaction device, which has a closed reaction chamber inside, the reaction chamber has a mounting structure, the mounting structure is used to fix the sample to be tested in the reaction chamber, the reaction device has an opening and a cover body capable of closing the opening; a gas supply device, which is connected to the reaction chamber and is used to introduce protective gas, corrosive gas and erosion particles into the reaction chamber; a heating device, which is used to heat the gas in the reaction chamber; a fan, which is located in the reaction chamber, and the material of at least part of the fan is the same as the material of the sample; and a motor, which is connected to the fan and is used to drive the fan to rotate.

[0005] In some embodiments, the fan includes: a rotating shaft connected to the motor; and fan blades, wherein a plurality of fan blades are spaced apart around the rotating shaft, the fan blades are detachably connected to the rotating shaft, and the material of the fan blades is the same as that of the sample being tested.

[0006] In some embodiments, the fan is an axial flow fan, and the fan is located directly below the mounting structure.

[0007] In some embodiments, the heating device includes a microwave heating element for generating microwaves and heating the reaction chamber with the microwaves.

[0008] In some embodiments, the heating device further comprises a heating sleeve, which is disposed outside the reaction device and in contact with the reaction device, and the heating sleeve contains a wave absorbing medium.

[0009] In some embodiments, the corrosion testing device also includes: a post-treatment tank having a post-treatment chamber inside, wherein the post-treatment chamber contains exhaust gas treatment liquid; a connecting pipeline connecting the reaction chamber and the post-treatment chamber; an air pump located in the connecting pipeline, used to draw the gas in the reaction chamber into the post-treatment chamber; a pressure relief pipeline connecting the reaction chamber and the post-treatment chamber; wherein the reaction device also includes a pressure relief port, the pressure relief pipeline is used to connect the pressure relief port with the post-treatment chamber, the pressure relief port has a safety valve, and the safety valve opens when the air pressure in the reaction chamber is greater than the air pressure threshold.

[0010] A second aspect of an embodiment of the present invention provides a control method for a corrosion testing device, which is applied to the corrosion testing device provided in the embodiment of the first aspect above, and includes: controlling the gas supply device to introduce corrosive gas and erosion particles into the reaction chamber, and controlling the heating device to heat the gas in the reaction chamber until the gas pressure in the reaction chamber reaches a target gas pressure and the temperature in the reaction chamber reaches a target temperature; controlling the motor to drive the fan to rotate at a preset speed for a preset time.

[0011] In some embodiments, controlling the motor to drive the fan to rotate at a preset speed for a preset time includes: controlling the motor to drive the fan to rotate at a preset constant speed for a preset time, or controlling the motor to drive the fan to rotate at a preset speed change rule for a preset time.

[0012] In some embodiments, the gas supply device is also capable of introducing air into the reaction chamber, and the corrosion testing device further includes: a post-processing tank and an air pump, wherein the post-processing tank has a post-processing chamber; after controlling the motor to drive the fan to rotate at a preset speed for a preset time, the control method further includes: controlling the gas supply device to introduce air or protective gas into the reaction chamber, and controlling the air pump to draw the gas in the reaction chamber into the post-processing chamber.

[0013] A third aspect of an embodiment of the present invention provides a method for using a corrosion testing device, which is applied to the corrosion testing device provided in the embodiment of the first aspect above, and includes: loading the sample and the fan into the reaction chamber through the opening; covering the opening with a cover body, and corroding the sample and the fan through the corrosion testing device; opening the cover body and taking out the sample and the fan through the opening.

[0014] An embodiment of the present invention provides a corrosion testing device, which includes a reaction device with a sealed reaction chamber inside, the reaction chamber has a mounting structure for mounting a sample to be tested, and the reaction device has an opening and a cover for closing the opening; the testing device also includes an air supply device, a heating device, a fan and a motor, the air supply device is used to introduce protective gas, corrosive gas and erosion particles into the reaction chamber, the heating device is used to heat the gas in the reaction chamber, thereby providing a specific corrosion environment for the sample to be tested, and after the environment in the reaction chamber reaches the target, the fan is driven to rotate by the motor to generate airflow in the reaction chamber and drive the erosion particles to impact the sample to be tested, thereby simulating the coupling of corrosion and erosion under a specific environment. At least part of the material of the fan is the same as that of the sample to be tested, that is, at least part of the fan is also the sample to be tested, and the airflow generated by the fan drives the erosion particles to impact the sample at a relatively low speed, thereby realizing the simulation of low-speed erosion. At the same time, during the rotation of the fan, the erosion particles hit the fan at a relatively high speed, thereby realizing the simulation of high-speed erosion. In this way, without the need to set up other additional structures, the simultaneous simulation of low-speed erosion and high-speed erosion can be realized, taking into account both low-speed erosion and high-speed erosion scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic structural diagram of a first corrosion testing device provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the assembly of a fan and a motor in a corrosion testing device provided by an embodiment of the present invention;

[0017] Figure 3 A schematic structural diagram of a second corrosion testing device provided by an embodiment of the present invention;

[0018] Figure 4 A schematic structural diagram of a third corrosion testing device provided by an embodiment of the present invention;

[0019] Figure 5 A schematic flow chart of a control method for a first corrosion testing device provided by an embodiment of the present invention;

[0020] Figure 6 A schematic flow chart of a control method for a second corrosion testing device provided by an embodiment of the present invention;

[0021] Figure 7 A schematic flow chart of a control method for a third corrosion testing device provided by an embodiment of the present invention;

[0022] Figure 8 A schematic flow chart of a fourth control method for a corrosion testing device provided by an embodiment of the present invention;

[0023] Fig. 9 A schematic flow chart of a method for using a corrosion testing device provided in an embodiment of the present invention.

[0024] Description of Reference Numerals

[0025] 1. Corrosion testing device; 10. Reaction device; 11. Reaction chamber; 12. Mounting structure; 13. Opening; 14. Cover; 141. Safety valve; 142. Pressure relief port; 20. Air supply device; 30. Heating device; 31. Microwave heating element; 32. Heating sleeve; 33. Excitation element; 40. Fan; 41. Rotating shaft; 42. Fan blade; 50. Motor; 61. Post-processing tank; 611. Post-processing chamber; 62. Connecting pipeline; 63. Air pump; 64. Pressure relief pipeline. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0028] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0029] In addition, it should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the following description, the terms "first\second\..." involved are merely used to distinguish different objects, and do not indicate that the objects have the same or related points. It should be understood that the directions described by the directions nouns such as "above", "below", "inside" and "outside" involved are all directions in normal use.

[0030] In the following specific embodiments, the testing device can be applied to corrosion testing in any corrosion and erosion coupling environment. The corrosion can be caused by any corrosive gas. The corrosive gas can be a weakly corrosive gas that is non-toxic or low-toxic to the environment. After the test is completed, the gas can be directly discharged into the atmosphere. The corrosive gas can be a highly corrosive gas that is toxic to the environment. After the test is completed, the gas needs to be processed before it can be discharged into the atmosphere. Unless otherwise specified, the following embodiments do not limit the type of corrosive gas.

[0031] In some embodiments, Figure 1 As shown, the corrosion testing device 1 includes: a reaction device 10, an air supply device 20, a heating device 30, a fan 40 and a motor 50. The reaction device 10 has a reaction chamber 11, and the reaction chamber 11 has a mounting structure 12 for mounting the sample to be tested. The reaction chamber 11 is used to provide a specific corrosion environment for the sample, so as to simulate the corrosion condition of the sample under the specific corrosion environment. Exemplarily, the mounting structure 12 can be a cantilever structure extending from the inner wall of the reaction chamber 11, and the sample can be placed on the cantilever structure; the reaction chamber 11 is a closed structure. During the corrosion test, the gas in the reaction chamber 11 will not dissipate to the outside of the reaction chamber 11 under the target state. Only in the scenario where the gas in the reaction chamber 11 needs to be discharged, the gas in the reaction chamber 11 can be passed into other spaces outside the reaction chamber 11 under controlled conditions. For example, during the reaction process, in order to avoid excessive air pressure in the reaction chamber 11, When the gas pressure in the reaction chamber 11 is greater than a preset gas pressure threshold, the gas is allowed to be discharged from the reaction chamber 11 through the pressure relief port, and when the gas pressure in the reaction chamber 11 is less than the preset gas pressure threshold, the pressure relief port is automatically closed. In other cases, the gas in the reaction chamber 11 is not allowed to flow out of the reaction chamber 11 during the reaction process. At the same time, the reaction device 10 also has an opening 13 and a cover body 14 capable of closing the opening 13. The opening and closing of the opening 13 can be controlled by the cover body 14. When the opening 13 is open, the space in the reaction chamber 11 is in an exposed state, so that samples or other structures and other structures can be easily loaded into the reaction chamber 11, and samples or other structures that have been corroded can also be easily taken out of the reaction chamber 11. When the opening 13 is closed, the reaction chamber 11 is in a sealed state.

[0032] The gas supply device 20 is connected to the reaction chamber 11, and is used to introduce protective gas, corrosive gas and erosion particles into the reaction chamber 11. It can be understood that the atmosphere in the reaction chamber 11 can be controlled by the gas supply device 20. For example, before starting the test, the protective gas is introduced into the reaction chamber 11, which can squeeze out the air in the reaction chamber 11 to reduce the impact of the air on the reaction while also protecting the inner wall of the reaction chamber 11. When the test starts, the corrosive gas is introduced into the reaction chamber 11 filled with protective gas to corrode the sample. At the same time, the gas supply device 20 can also introduce erosion particles into the reaction chamber 11 to simulate the use scenario of corrosion and erosion coupling. The erosion particles can be, for example, quartz sand or metal debris.

[0033] The heating device 30 is used to heat the gas in the reaction chamber to simulate the high-temperature working environment of the sample, so that the simulated structure is more in line with the actual situation. The heating device 30 can heat the gas in the reaction chamber 11 in any way. Exemplarily, the heating device 30 can be an electric heating wire directly arranged in the reaction chamber 11, so that the gas in the reaction chamber 11 can be directly heated. Exemplarily, the heating device 30 can also be a heating sleeve located outside the reaction chamber 11 and in contact with the reaction device 10, so as to indirectly heat the gas in the reaction chamber 11 and prevent the heating device 10 from being corroded by the corrosive gas in the reaction chamber 11.

[0034] At the same time, the fan 40 is located in the reaction chamber 11, and the motor 50 is used to drive the fan 40 to rotate. The gas supply device 20 passes the protective gas, corrosive gas and erosion particles into the reaction chamber 11, and the heating device 30 heats the reaction chamber 11. When the air pressure in the reaction chamber 11 reaches the target air pressure and the temperature reaches the target temperature, the gas supply device 20 stops passing the gas into the reaction chamber 11, and the heating device 30 stops heating or lowers the heating temperature to maintain the temperature in the reaction chamber 11 at the target temperature. At this time, the fan 40 is driven to rotate by the motor 50 to generate an airflow in the reaction chamber 11. The erosion particles impact the surface of the sample driven by the airflow, thereby simulating the coupling of corrosion and erosion.

[0035] Among them, at least part of the material of the fan 40 is the same as the material of the sample. It can be understood that at least part of the fan 40 is also the object to be tested. By observing the corrosion condition of this part, the service life of the sample material in a specific scenario can also be determined. It should be noted that in the actual working scenario, the impact speed between the erosion particles and the sample to be tested may vary within a large range. If the erosion particles are still driven by the airflow to impact the sample at high speed, the power of the motor 50 needs to be set very large, which requires increasing the manufacturing cost of the corrosion testing device. Moreover, since the motor 50 is a high-power motor, it is difficult to achieve precise adjustment within a small speed range, which makes it difficult to simulate the scenario of the erosion particles impacting the sample at a low speed through the high-power motor, that is, the relevant testing device is in the simulation. In the scenario of coupled simulated corrosion and erosion, it is difficult to take into account both high-speed erosion and low-speed erosion scenarios, resulting in the inability to adjust the erosion speed over a large range. In the embodiment of the present invention, by setting at least a portion of the fan 40 to the same material as the sample, the rotation speed of the fan 40 is greater than the flow rate of the airflow generated at the rotation speed, so that the erosion particles are driven by the airflow generated by the fan 40 to impact the sample at a lower speed, thereby achieving the simulation of low-speed erosion. At the same time, during the rotation of the fan 40, the erosion particles are made to hit the fan 40 at a higher speed, thereby achieving the simulation of high-speed erosion. Therefore, without the need to set up other additional structures, the simultaneous simulation of low-speed erosion and high-speed erosion can be achieved, thereby taking into account both low-speed erosion and low-speed erosion scenarios. Optionally, the rotation of the fan 40 can be used to simulate the high-speed erosion scenario, and the fan 40 can also be used to simulate the corrosion of the moving workpiece in the device. It can be understood that if the high-speed erosion in the device is caused by the collision of the workpiece with the erosion particles during movement, the rotation of the fan 40 can be used to simulate the high-speed erosion, and the collision mode between the erosion particles and the fan 40 can be made closer to the collision mode between the moving workpiece and the erosion particles in the actual working scenario, thereby making the simulated structure closer to reality.

[0036] Optionally, the motor 50 is a variable frequency motor, and the motor is located outside the reaction device 10, and the motor 50 is connected to the fan 40 through a transmission shaft.

[0037] Optionally, a pressure sensor and a temperature sensor are provided in the reaction chamber 11, the pressure sensor is used to obtain the pressure in the reaction chamber 11, and the temperature sensor is used to obtain the temperature in the reaction chamber 11. Optionally, a heat preservation material is provided on the inner wall of the reaction chamber 11 to improve the heat preservation effect of the reaction chamber 11.

[0038] An embodiment of the present invention provides a corrosion testing device, which includes a reaction device with a sealed reaction chamber inside, the reaction chamber has a mounting structure for mounting a sample to be tested, and the reaction device has an opening and a cover for closing the opening; the testing device also includes an air supply device, a heating device, a fan and a motor, the air supply device is used to introduce protective gas, corrosive gas and erosion particles into the reaction chamber, the heating device is used to heat the gas in the reaction chamber, thereby providing a specific corrosion environment for the sample to be tested, and after the environment in the reaction chamber reaches the target, the fan is driven to rotate by the motor to generate airflow in the reaction chamber and drive the erosion particles to impact the sample to be tested, thereby simulating the coupling of corrosion and erosion under a specific environment. At least part of the material of the fan is the same as that of the sample to be tested, that is, at least part of the fan is also the sample to be tested, and the airflow generated by the fan drives the erosion particles to impact the sample at a relatively low speed, thereby realizing the simulation of low-speed erosion. At the same time, during the rotation of the fan, the erosion particles hit the fan at a relatively high speed, thereby realizing the simulation of high-speed erosion. In this way, without the need to set up other additional structures, the simultaneous simulation of low-speed erosion and high-speed erosion can be realized, taking into account both low-speed erosion and high-speed erosion scenarios.

[0039] In some embodiments, Figure 2 As shown, the fan 40 includes: a rotating shaft 41 and blades 42. The rotating shaft 41 is connected to the motor 50. A plurality of blades 42 are arranged at intervals around the rotating shaft 41. The rotating shaft 41 drives the blades 42 to rotate under the drive of the motor 50, thereby generating an airflow in the reaction chamber 11. At the same time, the blades 42 are detachably connected to the rotating shaft 41 and the material of the blades 42 is the same as that of the sample. It can be understood that the blades 42 are also used as samples to be tested. Before starting the test, new blades can be assembled on the rotating shaft 41. After the test is completed, the corroded blades 42 can be removed from the rotating shaft 41 to determine the degree of corrosion of the blades 42.

[0040] In some embodiments, Figure 1 As shown, the fan 40 is an axial flow fan, and the fan 40 is located directly below the mounting structure 12. It can be understood that the airflow generated by the fan 40 flows out along the rotation axis of the fan 40, and the airflow can blow the erosion particles upward toward the sample fixed on the mounting structure 12. After leaving the airflow, the erosion particles will fall to the bottom of the reaction chamber 11 under the action of their own gravity and then be blown up by the fan 40; by arranging the fan 40 directly below the mounting structure 12, the airflow generated by the fan 40 can exert an upward force on the erosion particles in a direction parallel to the gravity direction of the erosion particles, so that the force is fully used to blow the erosion particles toward the sample, thereby achieving a better erosion effect.

[0041] In some embodiments, Figure 3As shown, the heating device 30 includes a microwave heating element 31, which is used to apply microwaves to the reaction chamber 11, so as to heat the gas in the reaction chamber 11 by microwaves. Since microwaves are penetrating, the microwave heating element 31 can be arranged outside the reaction chamber 11, so as to avoid corrosion of the microwave heating element 31 by corrosive gases. In addition, a mounting hole for the microwave heating element 31 to pass through is arranged in the reaction device 10, which can further improve the airtightness of the reaction chamber 11. Optionally, the microwave heating element 31 can heat the gas in the reaction chamber 11 by directly emitting microwaves to the reaction chamber 11, so as to make the gas molecules in the reaction chamber 11 vibrate at a high speed by microwaves; optionally, the microwave heating element 31 can also heat the structure outside the reaction chamber 11 and heat the reaction chamber 11 by heat conduction.

[0042] In some embodiments, Figure 3 As shown, the heating device 30 further includes a heating sleeve 32, which is sleeved on the outside of the reaction device 10 and in contact with the reaction device 10. The heating sleeve 32 contains an absorbing medium, which can efficiently absorb the microwaves emitted by the microwave heating element 31 and convert the microwaves into heat energy, so that the microwave energy generated by the microwave heating element 31 can be more efficiently utilized to heat the reaction chamber 11. Optionally, the heating sleeve 32 is surrounded by a heat-insulating material to reduce heat loss of the heating sleeve 32, thereby further improving the heating efficiency of the heating sleeve 32 on the reaction chamber 11.

[0043] Optional, such as Figure 3 As shown, the heating device 30 further includes an excitation member, which can absorb microwaves from the microwave heating member 31 to form a microwave channel, and the heating sleeve 32 is located in the microwave channel, thereby further improving the heating efficiency.

[0044] In some embodiments, Figure 4As shown, the corrosion test device 1 further includes: a post-processing tank 61, a connecting pipe 62 and an air pump 63. The post-processing tank 61 has a post-processing chamber 611, and the post-processing chamber 611 contains a tail gas treatment liquid, which is used to react with the corrosive gas to convert the corrosive gas into a gas that is harmless to the environment. For example, when the corrosive gas is an acid gas, the tail gas treatment liquid is an alkaline liquid to neutralize the acid gas; the connecting pipe 62 connects the reaction chamber 11 and the post-processing chamber 611, and the air pump 63 is located in the connecting pipe 62. When the air pump 63 is in operation, the air pump 63 can extract the corrosive gas in the reaction chamber 11 into the post-processing chamber 611, so that the post-processing liquid reacts with the corrosive gas. Optionally, during the corrosion test, the air pump 63 is in a stopped state, the reaction chamber 11 is in a closed state, and the corrosive gas in the reaction chamber 11 will not enter the post-processing chamber 611 through the connecting pipe 62; Optionally, the air pump 63 is a vacuum diaphragm pump, the air pump 63 is in a continuously running state, and the connecting pipe 62 has a switch valve, the switch valve is in a closed state during the corrosion test, and the switch valve can be opened after the corrosion test is completed, so as to further improve the airtightness of the reaction chamber 11. After the corrosion test is completed, the air pump 63 starts to run and draws the corrosive gas in the reaction chamber 11 into the post-processing chamber 611. After the corrosive gas in the reaction chamber 11 is completely drawn out, it is allowed to open the cover and take at least part of the sample and the fan 40 out of the reaction chamber 11, so as to avoid the corrosive gas from affecting the external environment. This corrosion testing device 1 can be applied to the scene of corrosion testing the sample by a highly corrosive or highly toxic gas, and the corrosive gas can be, for example, fluorine gas.

[0045] Optionally, the post-treatment tank 61 also has a liquid filling port and a sewage outlet, the liquid filling port is used to add exhaust gas treatment liquid to the post-treatment chamber, and the sewage outlet is used to discharge the waste liquid after the reaction; optionally, the post-treatment tank 61 also includes a liquid level sensor for obtaining the remaining amount of exhaust gas treatment liquid in the post-treatment chamber 611; optionally, the post-treatment tank 61 also includes a corrosion gas detector for detecting the treatment effect of the post-treatment tank 61 on the corrosive gas.

[0046] At the same time, the corrosion testing device 1 also includes a pressure relief pipeline 64, and the reaction device 10 also includes a pressure relief port 142. The pressure relief pipeline 64 connects the pressure relief port 142 with the post-processing chamber 611. The pressure relief port 142 has a safety valve 141. When the air pressure in the reaction chamber 11 is greater than the air pressure threshold, the safety valve 141 is opened by the gas, so that part of the corrosive gas in the reaction chamber 11 enters the post-processing chamber 611 from the pressure relief pipeline 64 and the air pressure in the reaction chamber 11 drops below the air pressure threshold. At this time, the safety valve 141 closes the reaction chamber 11 and returns to a closed state, thereby avoiding excessive air pressure in the reaction chamber 11, which may cause damage to the reaction device 10 or a safety accident.

[0047] Optional, such as Figure 4 As shown, the corrosion test device 1 also includes a cooling device 70. The cooling system 70 is in contact with the reaction device 10 and is used to reduce the temperature in the reaction chamber 11. After the reaction is completed, the temperature in the reaction chamber 11 needs to be reduced to near room temperature, and then the corrosive gas is pumped into the post-processing chamber 611. This can make the corrosive gas be more fully pumped into the post-processing chamber 611, and can reduce the possibility of high-temperature gas causing damage to the post-processing tank 61 and related pipelines. Optionally, the cooling device 70 is also used to Figure 4 The microwave heating element 31 and the heating jacket 32 ​​are cooled.

[0048] The embodiment of the present invention also provides a control method for a corrosion testing device, the control method is applied to the Figures 1 to 4 In any of the corrosion testing devices shown in the figure, the execution subject of the control method can be understood as the control unit of the corrosion testing device. The process of the control method is exemplarily described below in combination with various embodiments.

[0049] In some embodiments, Figure 5 As shown, Figure 5 A schematic flow chart of a control method for a first corrosion testing device provided by an embodiment of the present invention, the control method comprising:

[0050] Step S101, controlling the gas supply device to introduce corrosive gas and erosion particles into the reaction chamber, and controlling the heating device to heat the gas in the reaction chamber until the gas pressure in the reaction chamber reaches the target gas pressure and the temperature in the reaction chamber reaches the target temperature.

[0051] It can be understood that after the user loads the sample to be tested into the reaction chamber, the gas supply device is controlled to change the atmosphere in the reaction chamber. For example, the gas supply device is first controlled to introduce protective gas into the reaction chamber and exhaust the participating air in the reaction chamber, and then corrosive gas is introduced into the reaction chamber; at the same time, the heating device is controlled to control the temperature in the reaction chamber.

[0052] Among them, the air pressure control in the reaction chamber can be controlled by the gas supply duration of the gas supply device, or a pressure sensor can be set in the reaction chamber to achieve feedback control of the air pressure in the reaction chamber through the pressure sensor; the air pressure control in the reaction chamber can be controlled by the opening duration of the heating device, or a temperature sensor can be set in the reaction chamber to achieve feedback control of the temperature in the reaction chamber through the temperature sensor.

[0053] Step S102: Control the motor to drive the fan to rotate at a preset speed for a preset time period.

[0054] It can be understood that by controlling the rotation of the fan to generate airflow in the reaction chamber, the airflow drives the erosion particles to impact the sample, thereby realizing the coupled test of corrosion and erosion under a specific temperature and a specific atmosphere. At the same time, since at least part of the material of the fan is the same as the material of the sample, and the rotation speed of the fan is higher than the flow rate of the generated airflow, during the rotation of the fan, this part of the fan can also be considered to be under the coupled effect of corrosion and erosion and the erosion is high-speed erosion, that is, the coupling of corrosion and low-speed erosion is achieved through the sample, and the coupling of corrosion and high-speed erosion is achieved through at least part of the fan, so that without setting up other additional structures, the simultaneous simulation of low-speed erosion and high-speed erosion can be achieved, taking into account both low-speed erosion and low-speed erosion scenarios.

[0055] After the fan rotates for a preset time, the fan is controlled to stop rotating. At this time, the sample and the fan can be taken out of the reaction chamber to observe the corrosion of the sample and the part of the fan made of the same material as the sample.

[0056] In some embodiments, Figure 6 As shown, Figure 6 A flow chart of a control method for a second corrosion testing device provided by an embodiment of the present invention, and Figure 5 The difference between the process shown is that Figure 5 Step S102 in the embodiment includes:

[0057] Step S201: Control the motor to drive the fan to rotate at a preset constant speed for a preset time period.

[0058] It can be understood that the fan is controlled to rotate at a constant speed so that the erosion particles impact the sample at a constant speed, and the part of the fan that is the same material as the sample collides with the erosion particles at a constant speed, so that the degree of erosion caused by the erosion particles to the sample and the fan remains constant, which is convenient for variable control of corrosion testing.

[0059] In some embodiments, Figure 7 As shown, Figure 7 A flow chart of a control method for a second corrosion testing device provided by an embodiment of the present invention, and Figure 5 The difference between the process shown is that Figure 5 Step S102 in the embodiment includes:

[0060] Step S301: Control the motor to drive the fan to rotate for a preset time period at a preset speed variation rule.

[0061] It can be understood that the fan is controlled to rotate at a variable speed according to a preset rule, thereby generating a changing airflow in the reaction chamber, and the degree of erosion of the sample and the fan by the erosion particles changes according to a preset rule, so as to simulate the erosion of the sample and the fan by the erosion particles in a real environment, so that the test results are closer to the actual situation. Moreover, since the fan rotates at a variable speed, the force acting on the fan is a dynamic load, which can also realize the test of corrosion, erosion and dynamic load coupling of the fan.

[0062] In some embodiments, the gas supply device can also introduce air into the reaction chamber. The corrosion testing device also includes a post-processing tank and an air pump. The post-processing tank has a post-processing chamber, such as Figure 8 As shown, Figure 8 A schematic flow chart of a control method for a fourth corrosion testing device provided in an embodiment of the present invention, and Figure 5 The control method shown is different in that Figure 5 After step S102, the control method further includes:

[0063] Step S401, controlling the gas supply device to introduce air or protective gas into the reaction chamber, and controlling the air pump to pump the gas in the reaction chamber into the post-processing chamber.

[0064] It can be understood that the corrosive gas in the reaction chamber is pumped into the post-processing chamber through an air pump. The post-processing chamber contains tail gas treatment liquid. The tail gas treatment liquid reacts with the corrosive gas to convert the corrosive gas into a gas that is harmless to the environment. The gas that is harmless to the environment is then discharged into the atmosphere, thereby reducing the impact of the corrosive gas on the external environment. At the same time, by introducing air or protective gas into the reaction chamber, the air or protective gas occupies the space of the corrosive gas in the reaction chamber, so that the corrosive gas can be more fully pumped into the post-processing chamber.

[0065] Optionally, the air pump's air extraction and the air supply device's air ventilation operations into the reaction chamber can be performed simultaneously, and a scavenging effect is formed in the reaction chamber by the discharge of air or protective gas into the reaction chamber and the air pump's air extraction, so that the corrosive gas in the reaction chamber can be more fully extracted into the post-processing chamber; optionally, the air pump's air extraction and the air supply device's air ventilation operations into the reaction chamber can also be performed asynchronously. For example, most of the corrosive gas in the reaction chamber is first extracted into the post-processing chamber by the air pump, and then the air supply device is controlled to introduce air or protective gas into the reaction chamber, and then the air pump is controlled to extract air again, that is, the corrosive gas in the reaction chamber is more fully extracted into the post-processing chamber through secondary exhaust.

[0066] Optionally, the corrosion testing device further includes a cooling device, and before the air pump evacuates the air, the cooling device is controlled to cool the gas in the reaction chamber to room temperature.

[0067] The embodiment of the present invention also provides a method for using the corrosion testing device, which is applied to the Figures 1 to 4 For the corrosion testing device shown in any of the figures, the executor of the method of use can be the test operator or the mechanical structure in the automated test production line. The mechanical structure can be, for example, a trolley with a robotic arm. The process of the method of use is exemplarily described below in conjunction with the embodiments.

[0068] like Fig. 9 As shown, Fig. 9 A schematic flow chart of a method for using a corrosion testing device provided in an embodiment of the present invention, the method comprising:

[0069] Step S501: Load a sample and a fan into the reaction chamber through the opening.

[0070] It can be understood that the cover of the corrosion device is opened to expose the opening of the reaction chamber, through which the sample can be fixed to the mounting structure. At the same time, a new fan can be installed in the reaction chamber and connected to the motor through the opening. It should be noted that at least part of the material of the fan is the same as that of the sample. After the test is completed, the corroded fan needs to be taken out of the reaction chamber, so that a new fan needs to be installed in the reaction chamber before the next corrosion test begins.

[0071] Step S502: seal the opening with a cover, and corrode the sample and the fan with a corrosion testing device.

[0072] It can be understood that after the opening is sealed by the cover body, the reaction chamber is in a closed state, and then the corrosion test device automatically performs corrosion tests on the sample and the fan according to the set conditions. The control flow of the corrosion test device can be referred to in the attached figure of the specification. Figures 5 to 8 The control method shown in any one of the figures.

[0073] Step S503, open the cover and take out the sample and the fan through the opening.

[0074] It can be understood that after the corrosion test is completed, the cover is opened to expose the opening of the reaction chamber, and the sample and the fan that have been corroded can be taken out through the opening. Optionally, the control method of the corrosion test device also includes harmlessly treating the corrosive gas in the reaction chamber, and opening the cover after the corrosive gas is harmlessly treated and the gas temperature in the reaction chamber drops to room temperature, thereby reducing the impact of the corrosive gas and high temperature on the external environment and reducing the harm to the surrounding personnel.

[0075] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A corrosion testing device, characterized in that: The corrosion testing device comprises: A reaction device having a sealed reaction chamber inside, a mounting structure inside the reaction chamber, and the mounting structure is used to fix the sample to be tested in the reaction chamber, and the reaction device has an opening and a cover body capable of closing the opening; A gas supply device, connected to the reaction chamber, for introducing protective gas, corrosive gas and erosion particles into the reaction chamber; A heating device, used to heat the gas in the reaction chamber; A fan, the fan is located in the reaction chamber, and at least a part of the material of the fan is the same as the material of the sample; A motor is connected to the fan and is used to drive the fan to rotate.

2. The corrosion testing device according to claim 1, characterized in that: The fan comprises: A rotating shaft connected to the motor; The fan blades are arranged at intervals around the rotating shaft, the fan blades are detachably connected to the rotating shaft, and the material of the fan blades is the same as that of the sample being tested.

3. The corrosion testing device according to claim 1 or 2, characterized in that: The fan is an axial flow fan and is located directly below the mounting structure.

4. The corrosion testing device according to claim 1, characterized in that: The heating device comprises a microwave heating element, which is used to generate microwaves and heat the reaction cavity by the microwaves.

5. The corrosion testing device according to claim 4, characterized in that: The heating device further comprises a heating sleeve, which is sleeved on the outside of the reaction device and in contact with the reaction device, and the heating sleeve contains a wave absorbing medium.

6. The corrosion testing device according to claim 1, characterized in that: The corrosion testing device also includes: A post-treatment tank having a post-treatment chamber therein, wherein the post-treatment chamber contains an exhaust gas treatment liquid; A connecting pipeline connecting the reaction chamber and the post-processing chamber; An air pump, located in the connecting pipeline, used to pump the gas in the reaction chamber into the post-processing chamber; A pressure relief pipeline connecting the reaction chamber and the post-processing chamber; Wherein, the reaction device also includes a pressure relief port, the pressure relief pipeline is used to connect the pressure relief port with the post-processing chamber, the pressure relief port has a safety valve, and the safety valve opens when the air pressure in the reaction chamber is greater than the air pressure threshold.

7. A control method for a corrosion testing device, characterized in that: The control method is applied to the corrosion testing device according to any one of claims 1 to 6, and the control method comprises: Controlling the gas supply device to introduce corrosive gas and erosion particles into the reaction chamber, and controlling the heating device to heat the gas in the reaction chamber until the gas pressure in the reaction chamber reaches a target gas pressure and the temperature in the reaction chamber reaches a target temperature; The motor is controlled to drive the fan to rotate at a preset speed for a preset time period.

8. The control method according to claim 7, characterized in that: The controlling the motor to drive the fan to rotate at a preset speed for a preset time period comprises: controlling the motor to drive the fan to rotate at a preset constant speed for a preset time period, or, The motor is controlled to drive the fan to rotate for a preset time period at a preset speed variation rule.

9. The control method according to claim 7 or 8, characterized in that: The gas supply device can also introduce air into the reaction chamber. The corrosion testing device also includes: a post-processing tank and an air pump, wherein the post-processing tank has a post-processing chamber; After controlling the motor to drive the fan to rotate at a preset speed for a preset time, the control method further includes: The gas supply device is controlled to introduce air or protective gas into the reaction chamber, and the gas pump is controlled to pump the gas in the reaction chamber into the post-processing chamber.

10. A method for using a corrosion testing device, characterized in that: The method of use is applied to the corrosion testing device according to any one of claims 1 to 6, and the method of use comprises: Loading the sample and the fan into the reaction chamber through the opening; Seal the opening with a cover, and perform corrosion on the sample and the fan with the corrosion testing device; The cover is opened and the sample and the fan are taken out through the opening.

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