A metal corrosion resistance testing method, system, electronic equipment and medium

Abstract

The embodiment of the present invention provides a method, system, electronic device and medium for testing the corrosion resistance of metals, which belongs to the field of metal corrosion resistance detection and corrosion simulation under stress. The method includes: using a pre-designed electrolytic cell to test the electrochemical properties of the metal to be tested under different strain conditions, and obtaining the polarization curve of the metal to be tested under different strain conditions; reconstructing the polarization curve of the metal to be tested under different strain conditions in three dimensions, obtaining the three-dimensional reconstruction function under different strain conditions, and inputting the three-dimensional reconstruction function into a pre-constructed corrosion simulation model, so as to obtain the corrosion evolution law of the metal to be tested under stress. The problem of difficult measurement of input parameters for metal corrosion simulation under stress and inability to directly convert measured data into numerical simulation input parameters is solved, and the prediction of the corrosion evolution law of metals under mechanical and electrochemical interactions is realized. At the same time, the method can also be extended to the prediction of corrosion evolution of metal structures under stress.

Description

Technical Field

[0001] The invention relates to the technical field of metal corrosion resistance detection and corrosion simulation under stress, and in particular to a metal corrosion resistance testing method, system, electronic equipment and medium. Background Art

[0002] More than half of the damage in aircraft body structures is related to corrosion and load effects. The two occur simultaneously, couple with each other, and promote each other, accelerating structural damage and performance degradation.

[0003] At present, the technical difficulties in simulating the mechanical electrochemical interaction of load and corrosion coupling of metal materials mainly include: (1) It is difficult to obtain basic data. The polarization curve is the basis of corrosion simulation, and its measurement is generally based on a three-electrode system. How to reasonably distribute the positions of the three electrodes under stress and seal them in a targeted manner is the key to polarization curve measurement; (2) The test data cannot be directly converted into input parameters. In the existing technology, the mechanical electrochemical principle proposed by Gutman is mainly used. This theory has great operability in the numerical calculation of load and corrosion in the elastic deformation range, but when the metal enters the plastic range, a series of difficult-to-measure parameters such as dislocation density are introduced, which fundamentally limits the application of Gutman's theory in the plastic deformation of materials, thereby making the accuracy of metal corrosion resistance testing low. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a metal corrosion resistance testing method, system, electronic equipment and medium, which are used to completely or at least partially solve the technical defects existing in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned object, an embodiment of the present invention provides a method for testing the corrosion resistance of a metal, comprising: using a pre-designed electrolytic cell to test the electrochemical properties of the metal to be tested under different strain conditions, and obtaining polarization curves of the metal to be tested under different strain conditions;

[0006] The polarization curves of the metal to be tested under the different strain conditions are three-dimensionally reconstructed to obtain the three-dimensional reconstruction functions under the different strain conditions, and the three-dimensional reconstruction functions are input into a pre-constructed corrosion simulation model to obtain the corrosion evolution law of the metal to be tested under stress.

[0007] Optionally, the electrolytic cell comprises a chamber, a reference electrode, a counter electrode and a working electrode;

[0008] The chamber includes a main chamber, a horizontal chamber arranged perpendicular to the main chamber, and a vertical chamber arranged opposite to the main chamber. The reference electrode is arranged in the vertical chamber and forms an acute angle with the main chamber. The counter electrode is arranged in the main chamber. The working electrode is arranged at the bottom of the chamber.

[0009] Optionally, the electrochemical properties of the metal to be tested under different strain conditions are tested using a pre-designed electrolytic cell to obtain polarization curves of the metal to be tested under different strain conditions, including:

[0010] In the process of stretching the metal to be tested by a mechanical testing machine, the metal to be tested is respectively at a plurality of strain points in an elastic stage and a plurality of strain points in a plastic stage;

[0011] Based on a pre-designed electrolytic cell, multiple strain points in the elastic stage and multiple strain points in the plastic stage are tested respectively to obtain polarization curves.

[0012] Optionally, the construction of the corrosion simulation model includes:

[0013] Using the Lagrange interpolation method, the historical polarization curves under the different strain conditions are three-dimensionally reconstructed to obtain a three-dimensional reconstruction function function corresponding to the historical polarization curves;

[0014] A corrosion simulation model is constructed by taking the Laplace equation as the control equation and the three-dimensional reconstruction function corresponding to the historical polarization curve as the boundary condition.

[0015] Optionally, it is characterized in that the training of the corrosion simulation model includes:

[0016] A mechanical testing machine is used to perform a multi-cycle corrosion test on the test piece to obtain the corrosion morphology and corrosion depth of the test piece;

[0017] By comparing the corrosion morphology and corrosion depth of the test piece with the corrosion morphology and corrosion depth results calculated by the corrosion simulation model, the corrosion simulation model is trained to obtain the trained corrosion simulation model.

[0018] Optionally, the corrosion simulation model determines the corrosion rate of the metal to be tested according to the following formula:

[0019]

[0020] In the formula, v represents the corrosion rate, i represents the current density, and the electrode potential is established based on the three-dimensional reconstruction function form of the polarization curve and the introduction of strain parameters , the relationship between strain ε and current density i M represents relative molecular mass, F represents Faraday constant, n represents chemical equivalence coefficient, and ρ represents density.

[0021] On the other hand, an embodiment of the present invention further provides a metal corrosion resistance testing system, comprising:

[0022] The testing unit is used to test the electrochemical properties of the metal to be tested under different strain conditions using a pre-designed electrolytic cell to obtain the polarization curve of the metal to be tested under different strain conditions;

[0023] The simulation unit is used to perform three-dimensional reconstruction of the polarization curve of the metal to be tested under the different strain conditions, obtain the three-dimensional reconstruction function under the different strain conditions, and input the three-dimensional reconstruction function into a pre-constructed corrosion simulation model to obtain the corrosion evolution law of the metal to be tested.

[0024] On the other hand, an embodiment of the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned methods for testing metal corrosion resistance when executing the program.

[0025] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any one of the above-mentioned methods for testing metal corrosion resistance are implemented.

[0026] Through the above technical solution, the method of intermittent measurement of three-dimensional reconstruction of polarization curves is adopted to solve the problem of difficult measurement of input parameters of metal corrosion simulation under stress and the inability to directly convert measured data into numerical simulation input parameters. The prediction of the corrosion evolution law of metals under mechanical and electrochemical interactions is realized. At the same time, this method can also be extended to the prediction of corrosion evolution of metal structures under stress.

[0027] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a flow chart of a method for testing metal corrosion resistance provided by an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a stress-strain curve provided by an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of a polarization curve provided by an embodiment of the present invention;

[0032] Figure 4 (a) is a two-dimensional contour surface diagram of a polarization curve provided by an embodiment of the present invention;

[0033] Figure 4 (b) is a three-dimensional reconstruction of a polarization curve provided by an embodiment of the present invention;

[0034] Figure 5 (a) is a diagram showing the shape and structure of a test piece provided by an embodiment of the present invention;

[0035] Figure 5 (b) is a test piece processing structure diagram provided by an embodiment of the present invention;

[0036] Figure 6 is a schematic structural diagram of an electrolytic cell provided by an embodiment of the present invention;

[0037] Figure 7 is a schematic structural diagram of a fixing clip provided by an embodiment of the present invention;

[0038] Figure 8 is a sealing diagram of a reference electrode provided by an embodiment of the present invention;

[0039] Fig. 9 This is a sealing diagram of an electrode provided by an embodiment of the present invention;

[0040] Fig.10 It is a structural schematic diagram of a metal corrosion resistance testing system provided in an embodiment of the present invention.

[0041] Description of Reference Numerals

[0042] 1 cavity 10 main chamber

[0043] 11 horizontal chamber 12 vertical chamber

[0044] 2 Reference electrode 20 PTFE cap

[0045] 21 Sealing screw 22 Rubber sealing ring

[0046] 3 counter electrodes 4 working electrodes

[0047] 5PTFE plate 6Water inlet

[0048] 7 Water outlet 8 Reverse clamping screw DETAILED DESCRIPTION

[0049] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0050] See also Figure 1 As shown, it is a flowchart of a method for testing metal corrosion resistance provided by an embodiment of the present invention, which includes the following execution steps:

[0051] Step 100: using a pre-designed electrolytic cell to test the electrochemical properties of the metal to be tested under different strain conditions, and obtaining polarization curves of the metal to be tested under different strain conditions.

[0052] In some implementations, the following steps may be performed when executing step 100:

[0053] S1000: In a process of stretching the metal to be tested on a mechanical testing machine, the metal to be tested is respectively at a plurality of strain points in an elastic stage and a plurality of strain points in a plastic stage.

[0054] In some embodiments, in the stress-strain curve measurement of the material (i.e., the metal to be tested), a mechanical testing machine is usually used to stretch the material at a speed of 2 mm / min, and a strain gauge is used to record the material strain. The stress-strain curve is drawn as follows: Figure 2 As shown, the electrochemical measurement adopts the intermittent measurement method, and eight points with strains of 0, 0.005, 0.01, 0.02, 0.03, 0.05, 0.08, and 0.1, which are respectively in the elastic and plastic stages, are taken as electrochemical measurement points. A pre-designed multifunctional electrolytic cell is used to test the electrochemical properties of the material under different strain conditions, mainly for polarization curve measurement.

[0055] A1001: Based on a pre-designed electrolytic cell, multiple strain points in the elastic stage and multiple strain points in the plastic stage are tested respectively to obtain polarization curves.

[0056] In some embodiments, a potentiodynamic scanning method is used, the scanning range is generally -500 to 500 mV (vs. OCP), and the scanning rate is 0.167 to 1 mV / s, and the polarization curves of the metal material to be tested in the corresponding electrolyte solution under different strain conditions are obtained, such as Figure 3 shown.

[0057] Step 101: Perform three-dimensional reconstruction on the polarization curve of the metal to be tested under the different strain conditions to obtain a three-dimensional reconstruction function of the polarization curve under the different strain conditions, and input the three-dimensional reconstruction function into a pre-constructed corrosion simulation model to obtain the corrosion evolution law of the metal to be tested under stress.

[0058] In some embodiments, the corrosion simulation model may be constructed using the following steps:

[0059] S1: using the Lagrange interpolation method to perform three-dimensional reconstruction of the historical polarization curves under the different strain conditions, and obtain a three-dimensional reconstruction function corresponding to the historical polarization curves;

[0060] In some embodiments, since the change of strain generally does not affect the type of electrochemical reaction of the material, the strain is introduced into the polarization curve, and the isosurface diagram (see Figure 4 (a) Extending to three-dimensional space using Lagrange interpolation, see Figure 4 As shown in (b), the proposed method of discontinuous measurement to reconstruct the polarization curve can circumvent the difficulty of measuring parameters in the plastic deformation range based on the Gutman mechano-electrochemical principle.

[0061] S2: Using the Laplace equation as the control equation and the three-dimensional reconstruction function corresponding to the historical polarization curve as the boundary condition, a corrosion simulation model is constructed.

[0062] In some embodiments, constructing a corrosion simulation model includes:

[0063] Selection of mechanical constitutive model: The hardening function of the elastic-plastic simulation of the model usually selects the isotropic hardening model, which is characterized by:

[0064] σ yhard =σ exp (ε)-σ ys

[0065] In the formula, σ exp is the measured stress-strain curve, ε is the strain, σ ys is the yield strength of the material, and the elastic-plastic simulation follows the Von Mises yield criterion.

[0066] Selection of corrosion constitutive model: In the currently generally accepted corrosion simulation models, the solutions to the potential and particle concentration in the electrolyte domain are basically calculated based on the Nernst-Planck equation in the form of material conservation.

[0067]

[0068] Where: F is the Faraday constant; c i represents different particle concentrations; u represents the solution flow velocity vector; D i represents the diffusion coefficient; z i is the charge number of the particle; m i is the electromigration coefficient; is the electrolyte potential.

[0069] Since the concentration gradient caused by corrosion generally only exists in the local microenvironment, if there is no narrow structure such as gaps, the concentration change in the electrolyte domain is generally small. Therefore, in order to reduce the computational cost, the control equations are often simplified when solving the macroscopic geometric model. The commonly used approach at present is to assume that the electrolyte solution around the model is a static dilute solution, that is, the particle concentration in the electrolyte domain is the same everywhere, and there is no concentration gradient and convection effect. In this way, the convection term and diffusion term of the Nernst-Planck equation can be ignored. The charged particles in the electrolyte solution only form current through electromigration, and its potential distribution is controlled by the Laplace equation.

[0070]

[0071] In the formula, is the electrolyte potential.

[0072] The current density i can be calculated by Ohm's law.

[0073]

[0074] Where σ1 is the electrolyte conductivity, It is the electrolyte potential and can be directly measured by a conductivity tester.

[0075] The corrosion rate distribution of the model can be solved according to Faraday's law:

[0076]

[0077]

[0078] In the formula, It represents the change of corrosion depth with time, that is, the corrosion rate v; i is the local current density; n is the chemical equivalence coefficient; n is the chemical equivalence coefficient, F represents the Faraday constant, M is the relative molecular mass; ρ is the density.

[0079] In some embodiments, the selection of boundary conditions: The interface kinetic parameter setting in the corrosion simulation model generally uses the polarization curve as the basic input. This is because the polarization curve contains all the information about corrosion kinetics, and can determine the characteristics and control steps of the electrode reaction. It can also be processed to obtain the possible reactions and corrosion rates of metals in a given system. Therefore, it is theoretically necessary to use the polarization curve and the kinetic parameters obtained by its processing as the boundary conditions of the electrode corrosion interface. At present, the processing method for the apparent polarization curve is generally to obtain the relevant corrosion kinetic parameters through linear fitting, but this processing method can hardly ensure that the fitting results are 100% consistent with the experimental values, and the polarization test results of some metals, especially alloys (such as titanium alloys), the Tafel zone of the anode section is not obvious, and the use of numerical fitting methods often brings large errors. Therefore, this application introduces an interpolation function that characterizes the polarization curve, and establishes the dependence between the electrode potential and the current density in the form of an interpolation function: Compared with the method of fitting parameters with test curves, obtaining electrochemical kinetic parameters, and then applying them to the corresponding kinetic model, it can more comprehensively and directly describe the kinetic problems of the electrochemical process on the electrode surface. Since the change of strain usually does not affect the type of electrochemical reaction of the material, the strain is introduced into the polarization curve, and the traditional two-dimensional polarization curve is extended to three-dimensional space using Lagrange interpolation. A method of discontinuous measurement and reconstruction of polarization curves is proposed, thereby avoiding the difficulty of measuring parameters in the plastic deformation range of Gutman mechanical electrochemical principle.

[0080]

[0081] Where i represents the current density, represents the electrode potential and ε represents the strain.

[0082] Assuming that all boundaries except the electrode surface in the solution domain are insulated, that is, the surface current density i is 0, it can be expressed as:

[0083]

[0084] In some implementations, the corrosion simulation model may be trained using the following steps:

[0085] SA: A multi-cycle corrosion test is performed on the test piece using a mechanical testing machine to obtain the corrosion morphology and corrosion depth of the test piece;

[0086] In some embodiments, the test piece is generally designed as a "dog bone" flat piece, and its specific parameters are 200 mm wide and 50 mm high, wherein the groove is 26 mm deep and 26 mm wide, and the width of both sides of the groove is the same, both of which are 60 mm. There is a through hole with a diameter of 3 mm in the middle of the test piece. For details, refer to Figure 5(a) The tensile load is applied by a universal testing machine. In order to avoid the influence of the electrochemical measurement results on the electrical conduction between the specimen and the fatigue machine, the clamping end of the specimen is processed by a PVC plate and a metal rivet with an insulating sleeve, see Figure 5 (b). In addition, in order to avoid interference from external electromagnetic signals, aluminum foil is required to be used for electromagnetic shielding from the outside world. Before conducting electrochemical measurements, the test piece is polished step by step with water-abrasive sandpaper according to 240#, 800#, and 1500# to remove the surface oxide film. The test piece is placed on a tensile machine, and appropriate tensile parameters are selected. The test device is placed at one end of the circular through hole, and the other end of the circular through hole is sealed with 704 silicone rubber. Multi-cycle corrosion experiments are carried out. The experimental electrolyte solution must be the same as the test solution, and the corrosion morphology is observed under a microscope.

[0087] SB: By comparing the corrosion morphology and corrosion depth of the test piece with the comparison results of the corrosion morphology and corrosion depth calculated by the corrosion simulation model, the corrosion simulation model is trained to obtain the trained corrosion simulation model.

[0088] In some embodiments, the corrosion simulation model determines the corrosion rate of the metal to be tested according to the following formula:

[0089]

[0090] In the formula, v represents the corrosion rate, i represents the current density, and the electrode potential is established based on the interpolation function form of the polarization curve and the introduction of strain parameters. Relationship between strain ε and current density i M represents relative molecular mass, F represents Faraday constant, n represents chemical equivalence coefficient, and ρ represents density.

[0091] In some embodiments, see Figure 6 , which is a schematic diagram of the structure of an electrolytic cell provided in an embodiment of the present invention, wherein the electrolytic cell comprises a chamber 1, a reference electrode 2, a counter electrode 3 and a working electrode 4;

[0092] The chamber 1 includes a main chamber 10, a transverse chamber 11 and a vertical chamber 12, wherein one end of the transverse chamber 11 is connected to the chamber wall of the main chamber 10, and the bottom of the vertical chamber 12 is connected to the bottom of the main chamber 10;

[0093] One end of the reference electrode 2 extends into the top port of the vertical chamber 12 , one end of the counter electrode 3 extends into the top port of the main chamber 10 , and the working electrode 4 is arranged at the bottom of the main chamber 10 .

[0094] In some embodiments, see Figure 6As shown, the reserved holes of the reference electrode 2 and the counter electrode 3 are on the same plane, and the reference electrode 2 and the cavity are at an angle of 45°, so it is easier to make the distance between the reference electrode 2 and the working electrode 4 small enough. 2 The round polytetrafluoroethylene cover is embedded in the cavity, and the polytetrafluoroethylene plate 5 is used to ensure the horizontal fit between the cavity and the plate. The specimen is placed between the cavity and the plate, so that the working electrode area can be fixed without cutting the specimen. The water inlet 6 and the water outlet 7 are vertically oppositely distributed along the pipe diameter direction, and are perpendicular to the plane of the reserved holes of the reference electrode 2 and the counter electrode 3. The water outlet 7 is connected to a rubber tube to facilitate the discharge of the electrolyte solution, and is equipped with a water stop clamp. The water inlet adopts a threaded design for easy sealing.

[0095] In some embodiments, the working electrode sealing design is completed by a rubber seal and a fixing clamp with a reverse clamping screw 8, see Figure 7 As shown, it is a schematic diagram of a fixing frame provided by an embodiment of the present invention, wherein a fixing clamp is used to fix the electrolytic cell chamber to a horizontal plate, and the clamping force of the clamp is increased by adjusting the reverse clamping screw 8, thereby ensuring the sealing at the working electrode.

[0096] In some embodiments, the sealing method of the reference electrode 2 is similar to that of the counter electrode 3, and both use a rubber sealing ring in conjunction with a threaded seal. The sealing diagram of the reference electrode 2 is as shown in FIG. Figure 8 As shown. The sealing components mainly include a polytetrafluoroethylene cover 20, a sealing screw 21, and a rubber sealing ring 22, wherein the polytetrafluoroethylene cover 20 and the sealing screw 21 are connected by threads, thereby playing a sealing role. Unlike the reference electrode 2, the counter electrode 3 on the market (here refers to the platinum sheet electrode) generally does not have a tube diameter transition zone of the reference electrode 2, which requires further processing for the sealing of the counter electrode 3, and appropriately increasing the number of rubber sealing rings 22 to achieve the purpose of sealing. The position of the counter electrode rubber sealing ring 22 is shown in the figure, and the sealing assembly process of the counter electrode 3 is as shown in Fig. 9 shown.

[0097] Through the above technical solution, the method of intermittent measurement of three-dimensional reconstruction of polarization curves is adopted to solve the problem of difficulty in measuring parameters of the metal to be tested in the plastic deformation range. In addition, with the support of the corrosion simulation model, the corrosion resistance of the metal under the dual interaction of mechanics and electrochemistry is obtained, thereby improving the accuracy of the metal corrosion resistance test.

[0098] See also Fig.10 FIG. 1 is a schematic diagram of a metal corrosion resistance testing system provided by an embodiment of the present invention, comprising:

[0099] The testing unit 1000 is used to test the electrochemical properties of the metal to be tested under different strain conditions using a pre-designed electrolytic cell, and obtain the polarization curves of the metal to be tested under different strain conditions.

[0100] The simulation unit 1001 is used to perform three-dimensional reconstruction of the polarization curve of the metal to be tested under the different strain conditions, obtain the three-dimensional reconstruction function under the different strain conditions, and input the three-dimensional reconstruction function into a pre-constructed corrosion simulation model to obtain the corrosion evolution law of the metal to be tested under stress.

[0101] Through the above-mentioned metal corrosion resistance testing system, the testing unit adopts the method of intermittent measurement of three-dimensional reconstructed polarization curves to solve the problem that the parameters of the metal to be tested in the plastic deformation range are difficult to measure. Moreover, with the support of the corrosion simulation model, the corrosion expansion law of the metal under mechanical and electrochemical interaction is obtained.

[0102] On the other hand, an embodiment of the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the metal corrosion resistance testing method described in any of the above embodiments when executing the program.

[0103] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the metal corrosion resistance testing method described in any of the above embodiments are implemented.

[0104] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0105] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0106] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0107] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0108] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0109] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0110] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0111] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0112] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for testing metal corrosion resistance, characterized in that: include: Using a pre-designed electrolytic cell, the electrochemical properties of the metal to be tested under different strain conditions are tested to obtain the polarization curves of the metal to be tested under different strain conditions; Performing three-dimensional reconstruction on the polarization curve of the metal to be tested under the different strain conditions to obtain a three-dimensional reconstruction function of the polarization curve under the different strain conditions, and inputting the three-dimensional reconstruction function into a pre-constructed corrosion simulation model to obtain the corrosion evolution law of the metal to be tested under stress; The corrosion simulation model determines the corrosion rate of the metal to be tested according to the following formula: In the formula, v represents the corrosion rate, i represents the current density, and based on the three-dimensional reconstruction function of the polarization curve, the strain parameter is introduced to establish the electrode potential , the relationship between strain ε and current density i , M represents the relative molecular mass, F represents the Faraday constant, and n represents the chemical equivalence coefficient. is the density.

2. The metal corrosion resistance testing method according to claim 1, characterized in that: The electrolytic cell comprises a chamber, a reference electrode, a counter electrode and a working electrode; The cavity comprises a main cavity, a transverse cavity and a vertical cavity, wherein one end of the transverse cavity is connected to the cavity wall of the main cavity, and the bottom of the vertical cavity is connected to the bottom of the main cavity; One end of the reference electrode extends into the top port of the vertical chamber, one end of the counter electrode extends into the top port of the main chamber, and the working electrode is arranged at the bottom of the main chamber.

3. The metal corrosion resistance testing method according to claim 1, characterized in that: The method uses a pre-designed electrolytic cell to test the electrochemical properties of the metal under different strain conditions to obtain polarization curves of the metal under different strain conditions, including: In the process of stretching the metal to be tested by a mechanical testing machine, the metal to be tested is respectively at a plurality of strain points in an elastic stage and a plurality of strain points in a plastic stage; Based on a pre-designed electrolytic cell, multiple strain points in the elastic stage and multiple strain points in the plastic stage are tested respectively to obtain polarization curves.

4. The metal corrosion resistance testing method according to claim 1, characterized in that: The construction of the corrosion simulation model includes: Using the Lagrange interpolation method, the historical polarization curves under the different strain conditions are three-dimensionally reconstructed to obtain a three-dimensional reconstruction function corresponding to the historical polarization curves; A corrosion simulation model is constructed by taking the Laplace equation as the control equation and the three-dimensional reconstruction function corresponding to the historical polarization curve as the boundary condition.

5. The method for testing metal corrosion resistance according to any one of claims 1 to 4, characterized in that: The training of the corrosion simulation model includes: Conducting a multi-cycle corrosion test on the test piece using a mechanical testing machine to obtain the corrosion morphology of the test piece; The corrosion morphology of the test piece is compared with the corrosion morphology calculated by the corrosion simulation model, and the corrosion simulation model is trained to obtain the trained corrosion simulation model.

6. A metal corrosion resistance testing system, characterized in that: include: The testing unit is used to test the electrochemical properties of the metal to be tested under different strain conditions using a pre-designed electrolytic cell to obtain the polarization curve of the metal to be tested under different strain conditions; A simulation unit, used for performing three-dimensional reconstruction of the polarization curve of the metal to be tested under the different strain conditions, obtaining a three-dimensional reconstruction function under the different strain conditions, and inputting the three-dimensional reconstruction function into a pre-constructed corrosion simulation model to obtain the corrosion resistance of the metal to be tested; The corrosion simulation model determines the corrosion rate of the metal to be tested according to the following formula: In the formula, v represents the corrosion rate, i represents the current density, and based on the three-dimensional reconstruction function of the polarization curve, the strain parameter is introduced to establish the electrode potential , the relationship between strain ε and current density i , M represents the relative molecular mass, F represents the Faraday constant, and n represents the chemical equivalence coefficient. is the density.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the metal corrosion resistance testing method as described in any one of claims 1 to 5 are implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the metal corrosion resistance testing method as described in any one of claims 1 to 5 are implemented.

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