304 results about "Corrosion testing" patented technology

The invention discloses a radiator salt spray corrosion life prediction method based on dynamic time warping, which belongs to the technical field of material corrosion test and life prediction, and comprises the following steps: collecting time sequence data of surface impedance and thermal resistance change of a radiator, constructing a dual-channel corrosion characteristic data set, and recording a salt spray concentration data value. The temperature data value and the humidity data value are combined, and an environment sensitivity weight vector is established. Accelerated corrosion in a salt spray environment is simulated, a laboratory accelerated corrosion test spectrum is generated, meanwhile, an actual environment fluctuation spectrum is monitored, the two spectrums are aligned by using a weight vector, accelerated corrosion data are obtained, and a basic life prediction value is calculated. And calculating an environment-structure coupling factor by combining the interaction between the three-dimensional structure characteristic parameters of the radiator and the temperature and humidity data values, correcting the basic life prediction value, and generating a final life prediction result. According to the method, double-channel feature alignment and coupling factor correction are adopted, and the corrosion life of the radiator of the specific structure under the actual working condition can be predicted.

According to the multi-parameter monitoring method and device for the material stress corrosion test, the flow rate, temperature and ion concentration of corrosive liquid are adjusted in real time through closed-loop control, and the real service environment of a material is simulated; in combination with a constant strain rate and constant load mixed loading mode, loading parameters are dynamically adjusted according to material failure and environment change, and the behavior of deviating from real failure is avoided. Electrochemical, mechanical and corrosion environment data are synchronously collected, a ridge regression algorithm is utilized to fuse multi-modal features, a Granger causal test and mutual information entropy are combined to analyze a corrosion-mechanical-environment interaction effect, and early-stage tiny damage is captured. And calculating the number of residual cycles, generating a three-dimensional probability cloud picture to quantify a failure risk level, and realizing dynamic regulation and control through a grading strategy instead of traditional fixed threshold judgment. According to the method, the real-time performance, the reliability and the automation level of stress corrosion testing are remarkably improved, and a systematic solution is provided for deep exploration of a material failure mechanism in a complex service environment.

The present application relates to a construction method for a corrosion-resistance degree-mechanical property analysis model of a metal material, and the use thereof. The construction method for the analysis model comprises the following steps: using a metal material as a test object, and acquiring corrosion test experimental data sets at different equivalent corrosion time points under corrosion test conditions and mechanical property test experimental data sets at different corrosion degrees corresponding to the different equivalent corrosion time points; and respectively establishing an empirical relational expression of corrosion parameters changing with an equivalent corrosion time and an empirical relational expression of mechanical parameters changing with the equivalent corrosion time.

The invention discloses a corrosion resistance detection device for PFA film production, and relates to the technical field of film corrosion detection. Comprising a box body, a mounting plate is fixedly connected to the interior of the box body, a mounting frame is fixedly connected to the upper end of the mounting plate, a rotating column is arranged on the inner top wall of the mounting frame in a penetrating mode, the rotating column is rotationally connected with the mounting frame, a rotating plate is fixedly connected to the lower end of the rotating column, and a plurality of corrosive liquid dropwise adding mechanisms are arranged on the rotating plate; the multiple corrosive liquid dropwise adding mechanisms are arranged in the circumferential direction of the rotating plate at equal intervals, a rotating mechanism connected with the rotating column is arranged on the mounting frame, a mounting groove is formed in the upper end of the mounting frame, a limiting mechanism is arranged in the mounting groove, and a partition plate located below the mounting plate is fixed in the box body. According to the invention, through movement of the PFA film, different corrosive liquids can carry out corrosion resistance detection on different positions of the PFA film in sequence, so that the corrosion resistance detection process is more efficient.

The invention relates to a construction method and application of a corrosion resistance degree-mechanical property analysis model of a metal material. The application relates to an electric device comprising a battery system. The construction method of the analysis model comprises the following steps: taking a metal material as a test object, and obtaining a corrosion performance test experiment data set at different equivalent corrosion time points under a corrosion test condition and a mechanical performance test experiment data set at different corrosion degrees corresponding to the different equivalent corrosion time points; based on the corrosion performance test experiment data set, a first group of empirical relational expressions of corrosion parameters changing along with the equivalent corrosion time are established, based on the mechanical performance test experiment data set, a second group of empirical relational expressions of mechanical parameters changing along with the equivalent corrosion time are also established, and the corrosion test conditions are used for simulating a target service environment. The analysis model can be effectively used for mechanical property prediction and service life evaluation of the metal material, and the metal material can comprise an aluminum alloy material and can further comprise a battery box body material.

The invention discloses a scanning electrochemical microscope in-situ stress corrosion testing device and method, and belongs to the technical field of material stress corrosion testing, and the device comprises a base, a power transmission module, a clamping module, a corrosion module, a signal acquisition module and a scanning electrochemical microscope module. Slow strain rate stretching of a sample is achieved through a servo motor, a planetary gear speed reducer and a transmission mechanism, the clamping module is integrated with a force sensor to monitor loads in real time, the corrosion module provides a temperature-controllable corrosion environment, and the scanning electrochemical microscope module achieves electrochemical scanning of the surface of the sample. The device can synchronously obtain a load-deformation curve, corrosion morphology and microcell electrochemical information under stress-corrosion-temperature multi-field coupling, and provides an effective technical means for deeply researching a stress corrosion mechanism of a material. The method comprises the steps of sample installation, corrosion solution preparation, electrode arrangement, tensile test, electrochemical scanning and the like, and has the advantages of simplicity and convenience in operation, comprehensive data, high precision and the like.

The invention relates to the technical field of wind power blade material testing, and discloses a testing device and method for a salt spray corrosion test of a wind power blade composite material layer. According to the method, wind power blade composite material coating preparation parameters are obtained, and coating basic information is provided for subsequent performance evaluation; based on preset salt spray test environment control parameters, dynamic salt spray environment simulation conditions are generated so as to better fit the actual outdoor environment; then, a multi-sensor coupling monitoring network is constructed, real-time data acquisition is conducted on the corrosion process of the composite material coating, and comprehensive tracking of the corrosion process is achieved; processing real-time data by utilizing a corrosion characteristic analysis algorithm, generating a multi-dimensional corrosion characteristic index, and quantitatively representing the corrosion condition of the coating; and finally, evaluating the anti-corrosion stability of the new material coating in combination with the coating characteristic parameters and the multi-dimensional corrosion characteristic indexes. According to the method, the corrosion resistance of the coating in the actual environment can be more accurately reflected, and support is provided for research, development and application of the composite coating of the wind power blade.

The invention provides a U-shaped sample preparation device, and belongs to the technical field of stress corrosion testing, the U-shaped sample preparation device comprises a support seat, a base station and a pressure applying assembly. The base table is fixed on the supporting seat, the base table is provided with an embedding groove, a U-shaped groove and rotating shafts, the U-shaped groove is communicated with the embedding groove, the depth of the U-shaped groove is larger than that of the embedding groove, the extending direction of the embedding groove is perpendicular to that of the U-shaped groove, the rotating shafts are rotationally arranged in the base table, the rotating shafts are located on the two sides of the U-shaped groove, the rotating shafts and the U-shaped groove extend in the same direction, and the rotating shafts penetrate through the junction of the embedding groove and the U-shaped groove; the pressure applying assembly comprises a transmission mechanism and a pressure head, the transmission mechanism is fixed to the supporting base, the pressure head is connected to the transmission mechanism, and the transmission mechanism drives the pressure head to move in the height direction. According to the preparation device disclosed by the invention, two arms of the U-shaped sample formed by pressing and bending can be kept parallel and centered, the surface of the sample is not damaged, and related experimental standard requirements of the U-shaped sample in a stress corrosion experiment are met.

The invention discloses a bearing voltage simulator for a motor bearing electro-corrosion test and an operation method, belongs to the technical field of motor bearing electro-corrosion, and solves the problems that the measurement precision is interfered by stray parameters, the bearing voltage is difficult to flexibly adjust, a motor test platform is complex to operate and low in efficiency, and the test cost is high in the prior art in a bearing electro-corrosion experiment method. And the deep research of the bearing electro-corrosion mechanism is restricted. The invention provides a bearing voltage simulator for a motor bearing electrocorrosion test, which is formed by sequentially and electrically connecting a Boost voltage regulating circuit, a three-phase bridge type inverter circuit and a bearing voltage high-frequency model, and can accurately reproduce the voltage waveform of a motor bearing through a specific operation method, realize on-line adjustability of parameters and assist in bearing electrocorrosion research. According to the invention, the voltage waveform of the motor bearing can be accurately reproduced, parameters are adjustable on line, and the electric stress of the bearing under different working conditions can be flexibly simulated. A reliable platform is provided for bearing electrocorrosion research, and research cost and experiment complexity are reduced.

This invention discloses a corrosion resistance testing device for PFA film production, relating to the field of film corrosion testing technology. It includes a housing, with a mounting plate fixedly connected inside the housing. A mounting frame is fixedly connected to the upper end of the mounting plate. A rotating column is penetrating the inner top wall of the mounting frame and rotatably connected to the mounting frame. A rotating plate is fixedly connected to the lower end of the rotating column. Multiple corrosive liquid droplet application mechanisms are provided on the rotating plate, evenly spaced along the circumference of the rotating plate. A rotating mechanism connected to the rotating column is provided on the mounting frame. A mounting groove is provided at the upper end of the mounting frame, and a limiting mechanism is provided inside the mounting groove. A partition plate is fixed inside the housing, located below the mounting plate. This invention, through the movement of the PFA film, enables different corrosive liquids to sequentially test the corrosion resistance of different positions on the PFA film, making the corrosion resistance testing process more efficient.

The invention discloses a metal corrosion testing device and method for simulating a dynamic interface of supercritical CO2 and an aqueous solution, and belongs to the technical field of metal corrosion testing. The metal corrosion testing device comprises a reaction kettle, a temperature control system, a gas control system, a supercritical CO2 / aqueous solution interface simulation control system and an electrochemical testing system, the supercritical CO2 / water solution interface simulation control system comprises an electric push rod, a time relay and a sample holder; one end of the electric push rod penetrates through the kettle cover of the reaction kettle and is connected with the time relay; the time relay is used for controlling periodic reciprocating motion of the electric push rod; the electrochemical testing system comprises an electrochemical workstation and an electrochemical probe; the electrochemical workstation is connected with an electrochemical probe, and the electrochemical probe is arranged on the corrosion exposure experiment sample; the temperature control system is arranged in the reaction kettle, and the gas control system is connected with the reaction kettle. The technical problem that the metal corrosion of the dynamic interface of the supercritical CO2 and the aqueous solution cannot be accurately analyzed in the prior art is solved.

The invention relates to the technical field of alloy wire corrosion resistance testing, in particular to alloy wire corrosion resistance testing equipment which comprises a lead assembly, a liquid injection testing mechanism installed on the lead assembly, a pipe cavity pressurization mechanism installed in the liquid injection testing mechanism and two wire end tightening mechanisms installed on the liquid injection testing mechanism. The lead assembly comprises a stretched alloy wire; the liquid injection testing mechanism comprises a transparent test tube arranged outside the alloy wire, a liquid inlet assembly installed on the transparent test tube and a liquid inlet assembly installed on the transparent test tube. An independent testing platform is provided for an alloy wire in a rolling state, when the alloy wire is stretched to a certain length, a to-be-tested part of the alloy wire is sealed and clamped, and after a to-be-tested solution completely immerses the to-be-tested part of the alloy wire, the to-be-tested part of the alloy wire is tested by changing the pressure of the alloy wire and the hydraulic pressure of the solution within rated time. Therefore, the real-time corrosion change of the alloy wire in use can be effectively simulated.

An embodiment of the present application provides an erosion-corrosion test device and system. The erosion-corrosion test device includes: a container and a container cover. The container is used to hold a corrosion solution, and the container cover is used to seal the container; a motor, which is fixed above the container cover; a fixing member. The container cover is provided with a through hole penetrating the container cover, and a connecting rod of the motor suspends the fixing member in the container through the through hole. The fixing member is provided with at least one fixing structure, and the fixing structure is used to suspend a specimen to be tested. The erosion-corrosion test device provided by the embodiment of the present application can reduce the time cost of corrosion resistance performance testing and improve the accuracy of corrosion resistance performance testing.

The invention relates to a high / low temperature wear-corrosion coupling damage test device and a quantitative evaluation method, and belongs to the technical field of wear corrosion test and material failure analysis. The device comprises a temperature-controllable corrosion test tank, a friction-wear test machine, an electrochemical workstation and a high-low temperature external circulation temperature controller, the temperature-controllable corrosion test tank is arranged on the friction-wear test machine, and friction-wear performance testing is achieved through reciprocating motion of the friction-wear test machine. And the temperature-controllable corrosion test tank is externally connected with an electrochemical workstation and a high-low temperature external circulation temperature controller and is used for testing corrosion performance and controlling temperature. According to the invention, high-precision testing and quantitative analysis of abrasion and corrosion of the metal-based material in high and low temperature environments are realized.

The utility model relates to the technical field of corrosion testing machines, in particular to an automatic control stress corrosion testing machine which comprises a bearing cabinet, a medicine storage system, a medicine dispensing system, a testing system and a water supply system, the medicine storage system comprises a medicine storage barrel and a drying barrel arranged on the outer side of the medicine storage barrel in a sleeving mode. The dispensing system comprises a dispensing barrel and a liquid level meter I arranged on the inner wall of the dispensing barrel; the water supply system comprises a water purifier, and the water purifier adds pure water into a dispensing barrel of the dispensing system through a guide pipe II; the test system comprises a water tank which is fixedly arranged on a bottom plate of the test system area, and a pH value probe and a liquid level meter II are respectively arranged on the inner side wall of the water tank; a circumferential immersion wheel is arranged above the water tank, and a rotating shaft is fixedly connected to the center of the circumferential immersion wheel in a penetrating mode and electrically connected with a motor. Through full-automatic circulation of the whole medicine storage system, the medicine dispensing system, the testing system and the water supply system, the labor cost is reduced, the workload of testers is reduced, manual solution preparation errors and errors are reduced, and the testing precision is improved.

The invention relates to a controllable pressure-temperature-impurity material corrosion testing device based on a liquid ammonia environment. The controllable pressure-temperature-impurity material corrosion testing device comprises an impurity-containing liquid ammonia environment preparation system, a high-low pressure transmitting system, a high-low temperature constant-temperature circulating system, a corrosion reaction system, a data monitoring and collecting system and a tail gas treatment system, the corrosion test device not only can realize preparation of a liquid ammonia environment containing multi-element impurities and meet corrosion environments under different pressure and different temperature conditions, but also can meet synchronous test of a plurality of samples and a plurality of corrosion modes, so that the test capability of the test device is greatly improved.

The invention relates to the field of material stress corrosion tests, in particular to a tubular clamp for a high-temperature and high-pressure supercritical carbon dioxide corrosion test and a use method. The tubular sample clamp is mainly composed of a stretching shaft adapter, a gantry pipe pressing clamp fixing bolt, a height adjusting nut, a tubular sample, a base threaded rod, a sample plug bolt and a gantry pipe pressing clamp, and the gantry pipe pressing clamp is mainly composed of a main frame, a pipe pressing clamp, a pipe containing frame, a fixing bolt hole, a gantry clamp screw, a rotary disc and a guide groove. The two groups of gantry pipe pressing clamps are respectively fixed on the stretching shaft adapter and the sample table with the height adjusting nut, and a tubular sample can be stably clamped by adjusting the two groups of gantry pipe pressing clamps and the height adjusting nut. The device is used for carrying out stress corrosion test on the tubular sample in a high-temperature and high-pressure S-CO2 medium, the stress corrosion cracking sensitivity of the tubular sample in S-CO2 is evaluated by adopting a slow strain rate tensile test, and the device has the characteristics of simple structure, convenience in operation, low cost and high practicability.

The invention discloses a chain ring corrosion test device with a complex environment simulation function, and relates to the technical field of corrosion test devices.The test device comprises an environment simulation mechanism, a clamping mechanism, a detection mechanism and a temperature control mechanism, the clamping mechanism is fixedly connected with the environment simulation mechanism, the detection mechanism is fixedly connected with the environment simulation mechanism, and the temperature control mechanism is fixedly connected with the clamping mechanism. The temperature control mechanism is fixedly connected with the environment simulation mechanism, the environment simulation mechanism provides a unified supporting platform and a space closed environment for all the mechanisms, the clamping mechanism achieves adaptive clamping of a workpiece through a multi-dimensional clamp and simulates an applicable environment through stretching and rolling-off actions, and the detection mechanism feeds back and achieves state monitoring. The temperature control mechanism adjusts the environment temperature through cold and hot medium circulation, and therefore the combined effect of multiple factors such as temperature, humidity, corrosivity and stress in the test environment is achieved.

The invention belongs to the technical field of corrosion tests, and relates to a corrosion resistance evaluation and service life evaluation method for a hot end component of an aero-engine. The invention designs a corrosion test method which simulates a working-stopping state alternating effect and is moderate in acceleration rate. Comprising the following steps: determining corrosion factors of a parking state and a working condition state; designing an accelerated corrosion test method with different corrosion action strengths; short-time accelerated corrosion tests with different corrosion strengths are carried out, and accelerated corrosion test parameter screening is completed; according to test parameters obtained through screening, a long-time accelerated corrosion test is completed, and corrosion damage law analysis, mechanical property attenuation analysis and service life evaluation after different times are carried out. According to the method, the corrosion resistance of the hot-end component in the marine atmospheric environment can be truly evaluated, the corrosion damage rule and the mechanical property attenuation evolution rule are efficiently obtained, and the service life of related materials serving in the marine atmospheric environment is accurately evaluated.

A low-temperature salt spray corrosion system belongs to the technical field of polar environment salt spray tests and can be used for low-temperature salt spray environment corrosion tests of equipment and materials. The corrosion system comprises a low-temperature environment box, a salt spray test box, an electric heating system, salt spray spraying equipment, a water tank and an air pump. The anti-freezing liquid pipeline system has heat preservation and heating functions and is matched with the gas path system to complete conveying of a salt solution in a low-temperature environment; 2) a nozzle system with heat preservation and electric heating functions and adjustable particle size ensures low-temperature spraying of mist salt mist liquid drops; (3) an anti-freezing drainage system with a heating function ensures low-temperature drainage of deposition liquid in the box body; and 4) an electric heating function anti-freezing observation window system ensures the observation function of the box body at low temperature. Through the targeted low-temperature anti-freezing design, the low-temperature corrosion capability verification of the equipment material is realized, and the low-temperature freezing problem of the conventional salt mist box is solved.

The invention provides an ammonia hydrogen energy structure material constant strain rate and constant load stress corrosion synchronous monitoring platform based on acoustic emission and an implementation method thereof. Comprising a gas supply and pressurization system, a constant strain rate and constant load stress corrosion synchronous test system, a gas leakage safety control system, an acoustic emission and digital image correlation (DIC) technology online monitoring analysis system, a temperature control system and a computer integrated analysis system. In-situ dynamic analysis of stress corrosion crack propagation is realized in combination with a DIC technology; the temperature control system realizes accurate temperature control on the corrosion test reaction kettle through an independent temperature control module; the computer integrated analysis system processes multi-source data, and establishes dynamic mapping between acoustic emission characteristic parameters and corrosion crack growth rate. The platform solves the problems of off-line monitoring, single loading mode and the like of a traditional corrosion test, captures a corrosion-induced crack propagation process in real time, improves test efficiency and analysis comprehensiveness, and provides powerful support for research on corrosion behaviors of ammonia hydrogen energy structural materials.

The invention discloses a storage tank bottom plate corrosion risk prediction method based on electrochemical testing, and relates to the technical field of oil and gas storage and transportation monitoring, and the method comprises the steps: obtaining an external soil sample and an internal deposited water sample of a to-be-predicted storage tank, and obtaining the original environment parameters of the samples; the method comprises the following steps: respectively constructing a soil simulation solution and a deposition water simulation solution based on an out-tank soil sample and an in-tank deposition water sample, and respectively adding a standard metal sample made of the same material as a bottom plate of a to-be-predicted storage tank into the soil simulation solution and the deposition water simulation solution so as to realize an external corrosion test and an internal corrosion test, obtaining a corresponding corrosion test result; and inputting the original environmental parameters, the corrosion test result and the bottom plate information of the to-be-predicted storage tank into a preset corrosion risk assessment model to perform corrosion risk level prediction on the bottom plate of the to-be-predicted storage tank, and outputting the corrosion leakage risk level of the bottom plate of the to-be-predicted storage tank. And the bottom plate can be effectively inspected and predicted without periodically opening the tank.

The invention discloses a method for rapidly determining a critical stress value of metal stress corrosion cracking, and belongs to the technical field of metal material corrosion and protection. According to the invention, the critical stress value can be directly and rapidly measured instead of a sensitivity coefficient evaluation index obtained by a conventional stress corrosion test, the sample number and the test period can be obviously reduced, the double-truncated-cone-shaped sample is designed and processed, and the cross section of a single truncated cone of the sample is linearly decreased from one end to the other end; and the continuous stress gradient generated when the constant load is applied is accurately controlled. A stress corrosion test is carried out in a corrosive medium through a constant load method, and a critical stress value of stress corrosion cracking of the material in a corrosive environment is measured according to a loaded load and the maximum cross section area of cracks generated in the double-circular-truncated-cone-shaped sample. By utilizing the method, the stress corrosion cracking critical stress values of different metal materials can be efficiently and quickly measured, so that a basis is provided for section design and allowable load of engineering components and medical instruments.

The invention relates to the field of metal corrosion behavior monitoring and characterization, in particular to a long-term corrosion test device and method for a high-level radioactive waste geological disposal packaging container material. The test device comprises an open container, a sealing material, a temperature-resistant plastic sealing tank, a buffer material, a temperature control component, a packaging container candidate material test sample, a wire and silicone rubber, the sealing material is arranged in the open container, the temperature-resistant plastic sealing tank is embedded in the sealing material, the buffer material is filled in the temperature-resistant plastic sealing tank, and the temperature control component is arranged in the temperature-resistant plastic sealing tank. A sensor for electrochemical impedance spectroscopy measurement, a corrosion weightlessness sample and a corrosion product characterization sample are embedded in the buffer material; the wire penetrates through a sealing tank top cover of the temperature-resistant plastic sealing tank, and the temperature control component is inserted into the sealing tank top cover of the temperature-resistant plastic sealing tank. The device is suitable for long-term corrosion research and evaluation of a packaging container candidate material in a high-level radioactive waste geological disposal buffer material environment, and has the characteristics of multiple functions, high operability, good sealing performance, high stability and real-time measurement.

The invention relates to the technical field of corrosion tests, in particular to a deep soil environment simulation corrosion test device and method.The deep soil environment simulation corrosion test device comprises a test box, a plurality of opening air channels vertically distributed in soil in a penetrating mode and a heating unit composed of a circumferential heating part and an internal heating part vertically inserted into the soil. Gas is directly introduced into the soil through the perforated gas channel to adjust the oxygen content, the humidity and the chemical environment, the soil temperature is cooperatively adjusted through the heating unit, and dynamic closed-loop control is carried out based on feedback of the sensor. The environment regulation and control actuator is directly implanted into the soil, so that the problems of slow response, large gradient and incapability of simulating the deep low-oxygen compact soil environment caused by external regulation and control in the traditional method are solved, and accurate, rapid and uniform simulation and accelerated experiment on the deep soil corrosion environment are realized.

The invention discloses automobile terminal fretting corrosion testing equipment, and relates to the technical field of automobile terminal testing. The device comprises a high-strength device shell, a folding groove is formed in the position, close to one side corner, of the front end of the high-strength device shell, a terminal testing assembly is arranged at the position, close to the folding groove, of the bottom end of the interior of the high-strength device shell, and a high-precision resistance meter is arranged at the position, close to the terminal testing assembly, of the bottom end of the interior of the high-strength device shell. A turnover assembly is arranged on the inner wall of the side, close to the folding groove, of the high-strength equipment shell, the turnover assembly comprises a U-shaped supporting block, and the side end of the U-shaped supporting block is fixedly connected with the high-strength equipment shell; the two terminal fixing plates and the third supporting block are arranged to be detachable, the terminal fixing plates of different models can be conveniently replaced, the requirement for testing the automobile terminals of different models is met, the automobile terminal testing device can be compatible with the use conditions of most automobile terminals, and the application range of the device is expanded.

The present application relates to the technical field of material corrosion test, and particularly relates to a simulated deep-sea environment flowing seawater scouring corrosion electrochemical in-situ test device, which comprises a pressure tank and a hydraulic cylinder, the top end of the pressure tank is provided with a sealing cover, the moving end of the hydraulic cylinder is connected with the sealing cover, and the lower part of the outer lateral wall of the pressure tank is provided with a drain valve; the device further comprises a test assembly, an electrode assembly, a pressure control device, a cooling device, a motor, a hollow rotating shaft, a rotating disc, a positioning piece and an electrochemical workstation, the motor is installed on the top end sealing cover of the pressure tank, the top end of the hollow rotating shaft is rotatably installed on the inner lateral wall top of the sealing cover, the output end of the motor is connected with the top end of the hollow rotating shaft, the positioning piece is arranged on the top end of the rotating disc, and the lower part of the hollow rotating shaft extends into the positioning piece; the device can accurately and effectively simulate the corrosion conditions of metal materials under different hydrostatic pressures and different seawater flow rates, and can realize real-time electrochemical test under high rotating speed, thereby improving the test efficiency and convenience.

The invention discloses a metal material surface corrosion resistance testing device and method, and relates to a metal material corrosion resistance testing technology, the metal material surface corrosion resistance testing device comprises a testing machine body and a lifting stand column fixedly mounted at the rear of the top surface of the testing machine body; the test mechanism is arranged above the test machine body, the test mechanism comprises a test platform, test cone hoppers are arranged on the front side and the rear side of the interior of the test platform, and the test cone hoppers are used for limiting corrosive liquid to the interior so as to realize corrosion test; the bottom of the test platform is provided with a recovery mechanism, and the recovery mechanism comprises a recovery sliding plate. According to the device and the method for testing the surface corrosion resistance of the metal material, the double-station testing platform drives the testing cone hopper to perform corrosion testing on the metal material, and dust before testing and corrosive liquid after testing are collected, so that subsequent corrosion condition observation is facilitated; the convenience and the accuracy of the metal material in the testing process are improved.

The invention belongs to the technical field of corrosion and protection, and particularly relates to a multi-atmosphere high-temperature stress corrosion tensile test device and method.The multi-atmosphere high-temperature stress corrosion tensile test device comprises a tensile testing machine, a temperature control device, a sample, a telescopic pipe and an air supply device; the tensile testing machine is provided with clamps which are symmetrically arranged up and down and are used for clamping a sample, and the clamps are provided with flange plates which are hermetically connected with the telescopic pipe; the sample is clamped on a tensile testing machine clamp; the temperature control device is used for heating and preserving heat of the test environment; two ends of the telescopic pipe are hermetically connected with an upper clamp and a lower clamp of the tensile testing machine through flanges; the telescopic pipe is sleeved outside the sample to isolate the sample from the outside; and the air supply device is connected with the telescopic pipe and is used for filling air into the telescopic pipe. Influence factors such as corrosive gas flow and temperature can be independently regulated and controlled, high-temperature corrosion tests in complex environments can be realized, and requirements of material performance tests under different working conditions are met; and the manufacturing cost is low.

The present invention provides a composite thermal fluid downhole corrosion test device and a test method. The composite thermal fluid downhole corrosion test device comprises a thermal insulation bushing, a test piece retaining ring, a test piece base and a test piece fixing ring. The thermal insulation bushing comprises a bushing and a steel liner. The bushing is sleeved at the outer middle position of the steel liner. The test piece retaining ring is welded to the inner bottom end of the steel liner. The test piece base is clamped on the upper part of the test piece retaining ring. Three test piece grooves are provided on the test piece base. Test pieces of three different materials are respectively placed in the three test piece grooves. The three test pieces are fixed by the test piece fixing ring at the upper end of the steel liner. The composite thermal fluid downhole corrosion test device and the test method can be placed at any position in the pipe column, and the installation and operation are convenient. It does not touch the pipe wall and will not fall into the bottom of the well. At the same time, it is resistant to high temperature and high pressure and corrosion.