A method and system for testing material compatibility with high pressure hydrogen

Abstract

The application provides a material and high-pressure hydrogen gas compatibility test method and system. The method matches test parameters according to the properties of the material to be tested during operation, first processes the material to be tested to obtain a sample, then places the material sample in a set test container, fills high-pressure hydrogen gas and maintains for a set time to achieve hydrogen permeation test, and after the time is up, releases the pressure and takes out the sample, immediately performs coating treatment on the sample to form a coated sample; further, after the coated sample is solidified, it is transferred to a test environment, and the material mechanical property test of the coated sample is performed to obtain a test result. The method can effectively solve the problems of high sealing requirement of the existing test method, high possibility of hydrogen leakage, and expensive test equipment, has higher safety, does not need to release high-pressure hydrogen gas of the hydrogen storage alloy, realizes comprehensive test types, and guarantees the accuracy of the test result based on simple operation.

Description

Technical Field

[0001] This invention relates to the field of analysis of the effects of hydrogen energy on materials, and in particular to a method and system for testing the compatibility of materials with high-pressure hydrogen. Background Technology

[0002] The field of high-pressure hydrogen energy is developing rapidly. The impact of hydrogen on materials is the foundation of hydrogen energy safety technology, and the compatibility and damage mechanisms of hydrogen on materials are important bases for design, manufacturing, use, and maintenance. Research on hydrogen embrittlement of metallic materials mainly focuses on hydrogen introduced during steel smelting, corrosion processes, and high-temperature penetration. Research on hydrogen damage in high-pressure, high-purity, ambient-temperature environments during hydrogen energy utilization is relatively limited. Due to the high requirements for experimental environment and hardware, research institutions with the capability for dynamic high-pressure hydrogen environment experiments for hydrogen energy safety research are few and far between.

[0003] In existing technologies, the main methods for studying the damage of materials caused by high-pressure hydrogen are to conduct mechanical property tests on metals in a high-pressure hydrogen environment, such as slow strain rate tensile tests and fatigue tests. For example, GB / T 34542.2-2018 proposes a test method for the compatibility of metallic materials with hydrogen environment, which requires slow strain rate tensile testing of the material in a high-pressure hydrogen environment. However, such a test process cannot avoid dynamic sealing between the tensile rod and the test vessel, resulting in a high risk of high-pressure hydrogen leakage during the test, and insufficient safety and reliability.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To address the above problems, the present invention provides a method for testing the compatibility of materials with high-pressure hydrogen. In one embodiment, the method includes:

[0006] The test preparation steps include selecting matching test parameters from a preset test parameter list based on the properties of the material to be tested, and pre-treating the material to be tested based on these parameters to obtain a material sample; the test parameters include sample preparation method, test execution parameters, coating parameters, and test execution parameters.

[0007] The hydrogen permeation test procedure involves placing the material sample in the designated test container, filling it with high-pressure hydrogen according to the matching test execution parameters, and maintaining it for the set time to achieve the hydrogen permeation test.

[0008] The sample is an independent step. For material samples that meet the test time conditions, after depressurization, the samples are taken out and coated according to the test parameters within a set time to form a coated sample.

[0009] After the compatibility test is completed and the coated sample is cured, it is transferred to the test environment to conduct material mechanical property tests on the coated sample.

[0010] Preferably, in one embodiment, the process of pretreating the test material to obtain a material sample in the test preparation step includes:

[0011] Prepare the material to be tested into corresponding specimens according to the requirements of mechanical property testing;

[0012] The sample is polished in multiple stages according to the set polishing parameters to form a material sample.

[0013] Furthermore, in one embodiment, in the hydrogen permeation test step, the material sample is placed in a high-pressure hydrogen storage cylinder or high-pressure hydrogen pipeline that meets the test requirements to achieve the hydrogen permeation test.

[0014] As a further improvement of the present invention, in one embodiment, the hydrogen permeation test step, before charging with high-pressure hydrogen, further includes:

[0015] Adjust the temperature in the test container to the test temperature that matches the sample and test type.

[0016] As a further improvement of the present invention, the hydrogen permeation test step also includes: continuously monitoring the hydrogen pressure and temperature in the test container, and making real-time adjustments when the temperature changes to a set range.

[0017] In another optional embodiment, before coating the sample in the sample-independent step, the coating material is softened, and the softening method includes high-temperature softening or softening with a softening agent.

[0018] The sample is then coated using methods such as coating, spraying, or reactive synthesis.

[0019] As a further improvement of the present invention, in the sample independent step, when coating the sample, the appropriate materials to be used are dimethyl terephthalate adhesives, thermoplastic plastics, chemical polymer films and adhesives, rubber or polymeric materials.

[0020] Specifically, in one embodiment, the compatibility testing step includes testing the coated sample according to the test execution parameters in the test parameters, including slow strain rate tensile testing, fatigue testing, and impact energy testing.

[0021] Based on other aspects of the methods described in any one or more of the foregoing embodiments, the present invention also provides a storage medium storing program code that can implement the methods described in any one or more of the foregoing embodiments.

[0022] Based on the application of the methods described in any one or more of the above embodiments, the present invention also provides a testing system for the compatibility of materials with high-pressure hydrogen, which performs the methods described in any one or more of the above embodiments.

[0023] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0024] This invention provides a method for testing the compatibility of materials with high-pressure hydrogen. The method matches corresponding test parameters to the properties of the material under test. First, the material is processed to prepare a sample, which is then placed in a designated test container. High-pressure hydrogen is injected and maintained for a set time to achieve a hydrogen permeation test. After the time is up, the pressure is released, and the sample is immediately coated to form a coated sample. This method uses a reasonable sample processing technique to separate the high-pressure hydrogen damage test from the material damage test, effectively solving the problems of high equipment sealing requirements, high possibility of hydrogen leakage, and expensive test equipment in existing methods, thus improving safety. Furthermore, it has the capability to conduct comprehensive compatibility tests on materials in a high-pressure hydrogen environment, and can perform tensile and fatigue performance tests on the materials.

[0025] After the coated sample has cured, it is transferred to the test environment to conduct material mechanical property tests and obtain test results. The test is comprehensive and has the ability to perform hydrogen filling and compatibility tests on materials in a high-pressure hydrogen environment. It can not only perform lateral displacement loading, but also fatigue load loading. Based on simple operation, the accuracy of test results is guaranteed, which helps to expand the field of high-pressure hydrogen storage equipment material research and development with a lower cost and simpler test method.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic flowchart of a method for testing the compatibility of materials with high-pressure hydrogen according to an embodiment of the present invention.

[0029] Figure 2 This is a test execution guide diagram for the test method of material compatibility with high-pressure hydrogen provided in the embodiments of the present invention;

[0030] Figure 3This is a schematic diagram of the structure of a test system for the compatibility of materials with high-pressure hydrogen provided in another embodiment of the present invention. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples. Those skilled in the art will then fully understand how the present invention uses technical means to solve technical problems and achieve technical effects, and will be able to implement the present invention specifically based on the above-described implementation process. It should be noted that, as long as there is no conflict, the various embodiments and features of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.

[0032] Although the flowchart describes the operations as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. The order of the operations can be rearranged. A process can terminate when its operation is complete, but it may also have additional steps not included in the diagram. A process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0034] The compatibility and damage mechanisms of hydrogen energy with materials are important bases for design, manufacturing, use, and maintenance. Research on hydrogen embrittlement of metallic materials mainly focuses on hydrogen introduced during steel smelting, corrosion processes, and high-temperature penetration. Research on hydrogen damage in high-pressure, high-purity, ambient-temperature environments during hydrogen energy utilization is relatively limited. Due to the high requirements for experimental environment and hardware, research institutions with the capability for dynamic high-pressure hydrogen environment experiments for hydrogen energy safety research are few and far between.

[0035] In existing technologies, the main methods for studying the damage of materials caused by high-pressure hydrogen are to conduct mechanical property tests on metals in a high-pressure hydrogen environment, such as slow strain rate tensile tests and fatigue tests. For example, GB / T 34542.2-2018 proposes a test method for the compatibility of metallic materials with hydrogen environment, which requires slow strain rate tensile testing of the material in a high-pressure hydrogen environment. However, such a test process cannot avoid dynamic sealing between the tensile rod and the test vessel, resulting in a high risk of high-pressure hydrogen leakage during the test, and insufficient safety and reliability.

[0036] In addition, existing methods require mechanical property testing of materials in a high-pressure hydrogen environment. Although they can perform compatibility testing of materials in a high-pressure hydrogen environment, they usually provide load through the pressure difference on both sides of a disc-shaped sample, which cannot perform tensile and fatigue property testing of materials. Furthermore, during hydrogen filling, the hydrogen storage alloy needs to release high-pressure hydrogen to control the probability of risk. At the same time, there are limitations in the types of test specimens. For example, the material compatibility evaluation method and system based on constant displacement loading and high-pressure hydrogen disclosed in CN110455627A can only perform transverse displacement loading and cannot achieve fatigue load loading, which is not practical enough.

[0037] The study demonstrated through testing that the permeability, diffusion rate, and solubility of hydrogen in polymers are independent of hydrogen pressure. Therefore, after ensuring that high-pressure hydrogen permeates into the material, the material can be isolated from the outside world by polymer coating, ensuring that the high-pressure hydrogen does not diffuse out of the material after it permeates into it.

[0038] Therefore, to solve the above-mentioned problems in the prior art, the present invention provides a method and system for testing the compatibility of materials with high-pressure hydrogen. The present invention achieves the separation of hydrogen permeation test and mechanical property test of material damage behavior in high-pressure hydrogen environment by designing the test process and selecting isolation materials. It can realize various types of mechanical property test tests, making the high-pressure hydrogen material damage and compatibility test more safe, reliable and practical.

[0039] The following describes the detailed flow of the method according to an embodiment of the present invention with reference to the accompanying drawings, the steps of which can be executed in a computer system containing, for example, a set of computer-executable instructions. Although the logical order of the steps is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown here.

[0040] Example 1

[0041] Figure 1 This diagram illustrates a flow chart of the test method for the compatibility of materials with high-pressure hydrogen provided in Embodiment 1 of the present invention. (Refer to...) Figure 1 As can be seen, the method includes the following steps.

[0042] The test preparation steps include selecting matching test parameters from a preset test parameter list based on the properties of the material to be tested, and pre-treating the material to be tested based on these parameters to obtain a material sample; the test parameters include sample preparation method, test execution parameters, coating parameters, and test execution parameters.

[0043] The hydrogen permeation test procedure involves placing the material sample in the designated test container, filling it with high-pressure hydrogen according to the matching test execution parameters, and maintaining it for the set time to achieve the hydrogen permeation test.

[0044] The sample is an independent step. For material samples that meet the test time conditions, after depressurization, the samples are taken out and coated according to the test parameters within a set time to form a coated sample.

[0045] After the compatibility test is completed and the coated sample is cured, it is transferred to the test environment to conduct material mechanical property tests on the coated sample.

[0046] Based on the operational logic of the above embodiments, and addressing the safety risks of high-pressure hydrogen leakage during material compatibility testing and mechanical property testing in a high-pressure hydrogen environment, this invention designs an experimental method for optimizing material damage testing in a high-pressure hydrogen environment. This method can separate the high-pressure hydrogen damage test from the material damage test, allowing for material damage testing to be conducted under safer and simpler experimental conditions.

[0047] Before conducting hydrogen permeation tests on the test material, it is necessary to prepare and polish the material to form a suitable sample to ensure the uniformity of the test results. Therefore, in a preferred embodiment, the process of pretreating the test material to obtain a material sample in the test preparation step includes:

[0048] Prepare the material to be tested into corresponding specimens according to the requirements of mechanical property testing;

[0049] The sample is polished in multiple stages according to the set polishing parameters to form a material sample.

[0050] In practical applications, this invention mainly comprises two parts: hydrogen permeation testing of the material in a high-pressure hydrogen environment and mechanical property testing of the material. The hydrogen permeation testing in the high-pressure hydrogen environment and the mechanical property testing of the material are completely independent and conducted separately, such as... Figure 2 As shown.

[0051] Therefore, in one embodiment, in the hydrogen permeation test step, the material sample is placed in a high-pressure hydrogen storage cylinder or high-pressure hydrogen pipeline that meets the test requirements to achieve the hydrogen permeation test.

[0052] Furthermore, in one embodiment, the hydrogen permeation test step, before filling with high-pressure hydrogen, further includes: adjusting the temperature in the test container to a test temperature that matches the sample and test type.

[0053] When using the solution of this invention to conduct high-pressure hydrogen permeation tests on materials, no mechanical property tests are required. The tests are conducted by placing the material in high-pressure hydrogen pipelines, containers, and other equipment at any pressure.

[0054] Furthermore, considering that most hydrogen permeation tests require a relatively long time, and other factors may occur during the test that could cause changes in the test environment and interfere with the stable conduct of the test, in a preferred embodiment, the hydrogen permeation test step also includes: continuously monitoring the hydrogen pressure and temperature in the test container, and making real-time adjustments when the temperature changes to a set range. This effectively maintains the temperature and hydrogen pressure in the test container at a reasonable level, reliably ensuring the accuracy and authenticity of the test data.

[0055] Furthermore, in one embodiment, before coating the sample in the independent step, the coating material is softened, and the softening method includes high-temperature softening or softening with a softening agent; then the sample is coated by coating, spraying or reaction synthesis method.

[0056] In practical applications, polymer materials are usually used to coat the samples, including the softening, coating and curing of the polymer materials. The softening process includes, but is not limited to, softening of the polymer materials at high temperature or softening with a softening agent. The coating process includes, but is not limited to, coating, spraying, reaction synthesis and other methods. The curing process includes, but is not limited to, heating and using a curing agent and other methods.

[0057] Specifically, in one embodiment, during the sample-independent step, the coating treatment of the sample is performed using dimethyl terephthalate adhesive, thermoplastic plastic, a composite of chemical polymer film and adhesive, rubber, or polymeric material, depending on the sample.

[0058] In practical applications, after a hydrogen permeation test in a high-pressure hydrogen environment, the high-pressure hydrogen pipeline, container, and other equipment are depressurized, and the test material is coated with a polymer material within 10 minutes.

[0059] Commonly used coating materials include: low-density polyethylene (LDPE), polymethyl methacrylate (PMMA), polypropylene (PP), polystyrene (PS), polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), chlorinated butyl rubber (CIIR), chloroprene rubber (CR), butyl rubber (IIR), natural rubber (NR), nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), and other modified products and other polymer materials.

[0060] After the material that has completed the high-pressure hydrogen permeation test is coated, mechanical property tests are conducted, including but not limited to slow strain rate tensile testing, fatigue testing, and impact energy testing. Therefore, in one embodiment, the compatibility testing step includes performing slow strain rate tensile testing, fatigue testing, and impact energy testing on the coated sample according to the test execution parameters in the test parameters.

[0061] Specifically, when this invention is put into application, it mainly involves three steps:

[0062] The first step is to place the test material in a high-pressure hydrogen container, pipeline, or equipment, and then introduce high-pressure hydrogen to conduct the test.

[0063] The second step is to remove the test material after purging the high-pressure hydrogen and then coat it with a polymer.

[0064] The third part involves testing the mechanical properties of the polymer-coated material.

[0065] Taking a specific test material as an example, the compatibility test between the material and the hydrogen environment is carried out according to the following procedures:

[0066] Implementation Case 1

[0067] The hydrogen permeation and hydrogen damage behavior of 316Ti stainless steel in high-pressure hydrogen gas was tested. Tensile specimens of 316Ti were prepared, and their surfaces were polished sequentially with 400#, 800#, 1200#, and 2000# sandpaper. The 316Ti tensile specimens were placed in a 70MPa high-pressure hydrogen storage cylinder, filled with high-pressure hydrogen, and left for 180 days. After 180 days, the 70MPa high-pressure hydrogen storage cylinder was depressurized, and the 316Ti tensile specimens were removed. Immediately after removal, an adhesive primarily composed of dimethyl terephthalate was applied to the surface of the specimens. After the adhesive cured, a slow strain rate tensile test was performed on the 316Ti metal tensile specimens.

[0068] Implementation Case 2

[0069] The hydrogen permeation and hydrogen damage behavior of 15CrMo low-alloy steel in high-pressure hydrogen gas was tested. Fatigue test specimens of 15CrMo low-alloy steel were prepared, and their surfaces were polished sequentially using 400#, 800#, 1200#, and 2000# sandpaper. The 15CrMo low-alloy steel fatigue test specimens were placed in a 35MPa high-pressure hydrogen storage cylinder, filled with high-pressure hydrogen, and heated to 120℃ using resistance heating for 90 days. After 90 days, the 35MPa high-pressure hydrogen storage cylinder was depressurized, and the 15CrMo low-alloy steel fatigue test specimens were removed. Immediately after removal, a 100℃ PEEK 90G thermoplastic was applied to the surface of the specimen. After the plastic cured, fatigue tests were performed on the 15CrMo low-alloy steel fatigue test specimens.

[0070] Implementation Case 3

[0071] The hydrogen permeation and hydrogen damage behavior of CuAlFeNiCrMn high-entropy alloy in high-pressure hydrogen gas was tested. Tensile specimens of CuAlFeNiCrMn high-entropy alloy were prepared, and their surfaces were polished with 400#, 800#, 1200#, and 2000# sandpaper respectively. The CuAlFeNiCrMn high-entropy alloy tensile specimens were placed in a 120MPa high-pressure hydrogen gas pipeline. The high-pressure hydrogen pipeline was cooled to -40℃ using a temperature control device, and high-pressure hydrogen was introduced. The pipeline was then left to stand for 90 days. After 90 days, the high-pressure hydrogen pipeline was depressurized, and the temperature was slowly raised to room temperature. The CuAlFeNiCrMn high-entropy alloy tensile specimens were then removed. Immediately after removal, the specimens were covered with a low-density polyethylene (LDPE) film and filled with 502 glue. After the glue cured, fatigue tests were performed on the CuAlFeNiCrMn high-entropy alloy tensile specimens.

[0072] Implementation Case 4

[0073] The hydrogen permeation and hydrogen damage behavior of 718 nickel-based alloy in high-pressure hydrogen gas was tested. 718 nickel-based alloy tensile specimens were prepared, and their surfaces were polished sequentially with 400#, 800#, 1200#, and 2000# sandpaper. The 718 nickel-based alloy tensile specimens were placed in a 120 MPa high-pressure hydrogen gas pipeline. The high-pressure hydrogen pipeline was heated to 200°C using a temperature control device, and high-pressure hydrogen gas was introduced. The pipeline was then left to stand for 90 days. After 90 days, the high-pressure hydrogen pipeline was depressurized, and the 718 nickel-based alloy tensile specimens were removed. Immediately after removal, the specimens were coated with PA 66 polymer material. After the polymer material cured, slow strain rate tensile tests were performed on the 718 nickel-based alloy tensile specimens.

[0074] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0075] It should be noted that, in other embodiments of the present invention, the method can also combine one or more of the above embodiments to obtain a new material compatibility testing method with high-pressure hydrogen, so as to achieve a more refined study on the effect of hydrogen energy on materials and provide support for the design, manufacturing, use and maintenance of related projects.

[0076] The material compatibility testing method for hydrogen environment provided in the above embodiments of the present invention can effectively solve the problems of high equipment sealing requirements, high possibility of hydrogen leakage, and expensive testing equipment in existing high-pressure hydrogen environment hydrogen damage testing methods, thus achieving higher safety. By adopting a targeted polymer material sealing method, the high-pressure hydrogen damage test and the material mechanical property test are separated, facilitating material compatibility testing with hydrogen environment at a lower cost and with greater safety. In addition, compared with the prior art, the testing scheme of the present invention not only has the ability to stably charge materials with hydrogen in a high-pressure hydrogen environment, but also does not require the release of high-pressure hydrogen from the hydrogen storage alloy. Furthermore, it has the ability to conduct comprehensive compatibility testing of materials in a high-pressure hydrogen environment, and can perform tensile and fatigue performance tests on materials. It also has the ability to charge materials with hydrogen and conduct compatibility tests in a high-pressure hydrogen environment, and can perform not only lateral displacement loading, but also fatigue load loading.

[0077] This experimental protocol is applied to the field of high-pressure hydrogen compatibility testing of materials. It plays a crucial fundamental research role in the development of high-pressure hydrogen storage container materials and the safety performance analysis of high-pressure hydrogen storage equipment materials. This experimental method can provide a lower-cost and simpler testing approach for the research and development of high-pressure hydrogen storage equipment materials.

[0078] On the other hand, this technology has broad application prospects in the field of high-pressure hydrogen energy, especially in solving the problem of high leakage safety risks in the mechanical property testing of materials in high-pressure hydrogen environments.

[0079] Additionally, it should be noted that, based on the methods in any one or more embodiments of the present invention described above, the present invention also provides a storage medium storing program code that can implement the methods described in any one or more embodiments, which, when executed by an operating system, can implement the test method based on the compatibility of materials with high-pressure hydrogen as described above.

[0080] Example 2

[0081] The methods described in the above-disclosed embodiments of the present invention are detailed. These methods can be implemented using various forms of apparatus or systems. Therefore, based on other aspects of the methods described in any one or more of the above embodiments, the present invention also provides a material compatibility testing system for high-pressure hydrogen. This system is used to perform the material compatibility testing method for high-pressure hydrogen described in any one or more of the above embodiments. Specific embodiments are given below for detailed description.

[0082] Specifically, Figure 3 The diagram shows a schematic representation of the structure of a material compatibility testing system with high-pressure hydrogen provided in an embodiment of the present invention. Figure 3 As shown, the system includes:

[0083] The test preparation module is configured to select matching test parameters from a preset test parameter list based on the properties of the material to be tested, and to pre-treat the material to be tested to obtain a material sample based on these parameters; the test parameters include sample preparation method, test execution parameters, coating parameters, and test execution parameters;

[0084] The hydrogen permeation test module is configured to place the material sample in a set test container, fill it with high-pressure hydrogen according to the matching test execution parameters, and maintain it for a set time to achieve the hydrogen permeation test;

[0085] The sample independent module is configured to take out material samples that meet the test time conditions after depressurization, and coat the samples according to the test parameters within a set time to form a coated sample.

[0086] The compatibility testing module is configured to transfer the coated sample to the testing environment after the sample has cured, and then conduct material mechanical property tests on the coated sample.

[0087] Preferably, in one embodiment, the test preparation module is configured to pretreat the test material to obtain a material sample through the following operations:

[0088] Prepare the material to be tested into corresponding specimens according to the requirements of mechanical property testing;

[0089] The sample is polished in multiple stages according to the set polishing parameters to form a material sample.

[0090] Furthermore, in one embodiment, the hydrogen permeation test module is configured to place the material sample in a high-pressure hydrogen storage cylinder or high-pressure hydrogen pipeline that meets the test requirements to achieve the hydrogen permeation test.

[0091] Furthermore, in one embodiment, the hydrogen permeation test module is further configured to:

[0092] Adjust the temperature in the test container to the test temperature that matches the sample and test type.

[0093] As a further improvement of the present invention, the hydrogen permeation test module is also configured to continuously monitor the hydrogen pressure and temperature in the test container and make real-time adjustments when the temperature changes to a set range.

[0094] In another optional embodiment, the sample independent module is further configured to soften the coating material before coating the sample, and the softening method includes high-temperature softening or softening with a softening agent.

[0095] The sample is then coated using methods such as coating, spraying, or reactive synthesis.

[0096] In one embodiment, the sample independent module is specifically configured to select, when coating the sample, dimethyl terephthalate adhesive, thermoplastic plastic, a composite of chemical polymer film and adhesive, rubber, or polymer material according to the sample.

[0097] Furthermore, in one embodiment, the compatibility test model performs the following types of tests: slow strain rate tensile test, fatigue test, and impact energy test on the coated specimen according to the test execution parameters in the test parameters.

[0098] In the material compatibility testing system with high-pressure hydrogen provided in this embodiment of the invention, each module or unit structure can operate independently or in combination according to actual test and processing requirements to achieve the corresponding technical effects.

[0099] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0100] The phrase "an embodiment" in the specification means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0101] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A method for testing the compatibility of a material with high-pressure hydrogen, characterized in that, The method includes: The test preparation steps include selecting matching test parameters from a preset test parameter list based on the properties of the material to be tested, and pre-treating the material to be tested based on these parameters to obtain a material sample; the test parameters include sample preparation method, test execution parameters, coating parameters, and test execution parameters. The hydrogen permeation test procedure involves placing the material sample in the designated test container, filling it with high-pressure hydrogen according to the matching test execution parameters, and maintaining it for the set time to achieve the hydrogen permeation test. For independent sample preparation, material samples meeting the test time requirements are removed after depressurization and coated according to the test parameters within a set time to form coated samples. The coating process involves selecting dimethyl terephthalate adhesives, thermoplastics, composites of chemical polymer films and adhesives, rubber, or polymeric materials based on the sample. For example, if the sample is Ti stainless steel, dimethyl terephthalate adhesives are used; if the sample is CrMo low-alloy steel, PEEK 90G thermoplastics are used; if the sample is CuAlFeNiCrMn high-entropy alloy, low-density polyethylene (LDPE) film is used; and if the sample is a nickel-based alloy, PA 66 polymeric material is used. After the compatibility test is completed and the coated sample is cured, it is transferred to the test environment to conduct material mechanical property tests on the coated sample.

2. The method according to claim 1, characterized in that, The process of pretreating the test material to obtain a material sample in the test preparation steps includes: Prepare the material to be tested into corresponding specimens according to the requirements of mechanical property testing; The sample is polished in multiple stages according to the set polishing parameters to form a material sample.

3. The method according to claim 1, characterized in that, In the hydrogen permeation test procedure, the material sample is placed in a high-pressure hydrogen storage cylinder or high-pressure hydrogen pipeline that meets the test requirements to achieve the hydrogen permeation test.

4. The method according to claim 1, characterized in that, The hydrogen permeation test procedure, before the high-pressure hydrogen filling, also includes: Adjust the temperature in the test container to the test temperature that matches the sample and test type.

5. The method according to claim 1, characterized in that, The hydrogen permeation test procedure also includes: continuously monitoring the hydrogen pressure and temperature in the test container and making real-time adjustments when the temperature changes to a set range.

6. The method according to claim 1, characterized in that, In the sample independent step, before coating the sample, the coating material is softened. The softening method includes high-temperature softening or softening with a softening agent. The sample is then coated using methods such as coating, spraying, or reactive synthesis.

7. The method according to claim 1, characterized in that, In the compatibility testing procedure, the test types include slow strain rate tensile testing, fatigue testing, and impact energy testing of the coated specimen according to the test execution parameters in the test parameters.

8. A storage medium, characterized in that, The storage medium stores program code capable of implementing the method as described in any one of claims 1 to 7.

9. A testing system for the compatibility of materials with high-pressure hydrogen, characterized in that, The system performs the method as described in any one of claims 1 to 7.

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