Material resistance testing apparatus and method of use thereof

Abstract

The application provides a material resistance test device and a use method thereof, wherein the test device comprises a groove body, a diaphragm and a sample placing member for placing a sample to be tested, the groove body comprises an anode groove body and a cathode groove body, an anode plate is arranged in the anode groove body, and a cathode plate is arranged in the cathode groove body; the anode plate and the cathode plate are used for connecting a power supply to electrolyze electrolyte in the anode groove body and the cathode groove body; the diaphragm is arranged between the anode groove body and the cathode groove body; and the sample placing member is arranged in the anode groove body and / or the cathode groove body. The application can simultaneously meet the test requirements of electrolyte resistance to acid, oxidation resistance and reduction resistance of materials, especially vanadium battery materials.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of vanadium battery, and particularly relates to a material resistance testing device and a use method thereof. BACKGROUND

[0002] Vanadium flow battery (VFB, vanadium battery or vanadium battery system) is a high-efficiency energy storage battery, which is a redox battery with vanadium as an active substance in a circulating flow liquid state. The vanadium flow battery has the advantages of independent adjustment of system capacity and power, rapid response, safety and reliability, environmental friendliness, long cycle life, easy maintenance and renewability. The vanadium flow battery has become one of the most promising technologies in large-scale energy storage such as renewable energy power generation, peak load shifting of power grid and emergency and standby power station.

[0003] The vanadium flow battery mainly consists of a capacity unit, a power unit, a control unit and a conveying unit. In the vanadium battery system, there are many types of components and equipment that directly contact with vanadium electrolyte and do not provide a circuit channel (electrode, polar plate, diaphragm), such as electrolyte storage tank in the capacity unit, liquid flow frame, sealing element (such as flow channel cover plate, O-ring, rubber pad, etc.) in the power unit, pipeline, pump, valve and heat exchanger in the conveying unit, etc. The material of the above components and equipment has a direct impact on the resistance of the electrolyte (acid corrosion resistance, oxidation resistance, reduction resistance, etc.), which will affect the composition of the vanadium electrolyte and the service life of the components and equipment, and further affect the overall electrical performance and service life of the vanadium battery.

[0004] As the electrode material of the vanadium flow battery must have the advantages of strong oxidation resistance and strong acid resistance, low resistance, good electrical conductivity, high mechanical strength and good electrochemical activity, therefore, it is particularly important to test the material resistance for the vanadium flow battery.

[0005] At present, in the vanadium flow battery industry, the main method for testing the material resistance is immersion method, that is, the material sample is immersed in vanadium electrolyte for a period of time, and then the performance of the material is evaluated by weighing method and observation method. However, this method only has a certain evaluation effect on acid corrosion resistance, but in the use process of vanadium battery, the solution system faced by the material not only has acidity, but also has oxidation and reduction according to the different charging and discharging states, and there is no resistance testing device that can simultaneously meet the requirements of vanadium battery material on acid resistance, oxidation resistance and reduction resistance of vanadium electrolyte. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a material resistance testing device and a use method thereof, which can simultaneously meet the testing requirements of the material, especially the vanadium battery material, on the acid resistance, oxidation resistance and reduction resistance of the electrolyte.

[0007] To solve the above technical problems, in a first aspect, the present application provides a material resistance testing device, comprising: a tank body, the tank body comprising an anode tank body and a cathode tank body; wherein the anode tank body is internally provided with an anode plate, and the cathode tank body is internally provided with a cathode plate; the anode plate and the cathode plate are used to connect a power supply to electrolyze electrolyte in the anode tank body and the cathode tank body; a diaphragm is arranged between the anode tank body and the cathode tank body; a sample placing member for placing a sample to be tested is arranged in the anode tank body and / or the cathode tank body.

[0008] Optionally, a cover plate is further included, which cooperates with the anode tank body and / or the cathode tank body to seal an opening of the anode tank body and / or the cathode tank body.

[0009] Optionally, one side of the cover plate is movably connected to one side of the anode tank body and / or the cathode tank body, or the cover plate is a separate structure from the anode tank body and the cathode tank body.

[0010] Optionally, a breathing valve is further arranged on the cover plate.

[0011] Optionally, an inlet valve is further arranged on the cover plate.

[0012] Optionally, the diaphragm is a perfluorosulfonic acid proton membrane.

[0013] Optionally, the sample placing member comprises a tank net and at least one sample cage, wherein the tank net is arranged inside the anode tank body and / or the cathode tank body, and the sample cage is connected to the tank net.

[0014] Optionally, the sample cage has a hanging ear which is hung on the tank net.

[0015] Optionally, the anode tank body and the cathode tank body are respectively provided with a liquid discharge valve.

[0016] Optionally, the anode tank body and the cathode tank body are respectively provided with a liquid level tube.

[0017] In a second aspect, the present application further provides a method for using a material resistance test device, which is suitable for the material resistance test device as described in the first aspect, and the method comprises: injecting electrolyte into the anode tank and the cathode tank respectively, wherein the anode tank and the cathode tank are both injected with acidic electrolyte; connecting the anode plate and the cathode plate with an electrolysis power supply and passing an electrolysis current; stopping the power supply after the electrolysis process is completed, and placing the material to be tested in the electrolyte in the anode tank and / or the cathode tank, wherein a reducing environment is provided in the cathode tank and an oxidizing environment is provided in the anode tank; and passing a test current to test the resistance of the material to be tested.

[0018] Optionally, the cathode tank is injected with vanadium electrolyte, and the anode tank is injected with a 25-30wt% sulfuric acid solution.

[0019] Optionally, the current density of the electrolysis current is 100-300mA / cm 2 , and the electrolysis time t is calculated by the following formula: In the formula, t is the electrolysis time, in seconds; C is the concentration of the vanadium electrolyte, in mol / L; V is the volume of the vanadium electrolyte injected, in liters; ā is the average valence of vanadium ions in the vanadium electrolyte, in mol / L; F is the Faraday constant, which is 96485.3 C / mol; and I is the electrolysis current, in amperes.

[0020] Optionally, the current density of the test current is 10-20mA / cm 2 .

[0021] Optionally, the method further comprises: monitoring the liquid level of the electrolyte in the anode tank and / or the cathode tank during the test of the material to be tested, and adding pure water to maintain the volume of the electrolyte.

[0022] Compared with the prior art, the present application has the following advantages: by providing a tank, a diaphragm and a sample placing member for placing a sample to be tested, wherein the tank comprises an anode tank and a cathode tank, the anode tank is internally provided with an anode plate, and the cathode tank is internally provided with a cathode plate; the anode plate and the cathode plate are used to connect a power supply to electrolyze the electrolyte in the anode tank and the cathode tank; the diaphragm is arranged between the anode tank and the cathode tank; and the sample placing member is arranged in the anode tank and / or the cathode tank, thereby simultaneously meeting the test requirements of the material, especially vanadium battery material, for acid resistance, oxidation resistance and reduction resistance of the electrolyte. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present application, and they are collected and constitute a part of the present application, which illustrate the embodiments of the present application, and together with the present specification, play a role in explaining the principles of the present application. In the drawings:

[0024] Figure 1 Figure 1 is a structural schematic diagram of a material resistance testing device according to an embodiment of the present application;

[0025] Figure 2 Figure 2 is a structural schematic diagram of a groove net according to an embodiment of the present application;

[0026] Figure 3 Figure 3 is a structural schematic diagram of a sample cage according to an embodiment of the present application;

[0027] Figure 4 Figure 4 is a flowchart of a method for using a material resistance testing device according to an embodiment of the present application.

[0028] The various marks in the drawings represent the following:

[0029] 10 - groove body, 101 - anode groove body, 102 - cathode groove body;

[0030] 11 - anode plate;

[0031] 12 - cathode plate;

[0032] 13 - diaphragm;

[0033] 14 - sample placing member, 141 - groove net, 142 - sample cage, 143 - hanging ear;

[0034] 15 - cover plate;

[0035] 16 - breathing valve;

[0036] 17 - liquid inlet valve;

[0037] 18 - liquid outlet valve;

[0038] 19 - liquid level tube. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar scenarios without creative labor. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0040] As used in the description of the application and the claims the words "including" and "comprising" and the like mean "including without limitation," "comprising without limitation," and so forth, unless otherwise expressly specified herein.

[0041] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only and not to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail but are to be considered as part of the present application where appropriate. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on opposing pages refer to like elements on both pages, thus further discussion of some elements will not be repeated.

[0042] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by terms such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", and "top", "bottom" are generally based on the orientation or positional relationships shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of the present application. The orientation terms "inner", "outer" refer to the inner and outer relative to the contour of the parts themselves.

[0043] For purposes of the description hereinafter, spatial relations terms are used, such as "above", "below", "upper", "lower", and the like, to describe the relative position of one device or feature to another as the devices are depicted in the figures. The spatial terms are used only to facilitate understanding of relative position, and can not necessarily be the only possible positions. For example, if the device in a figure is turned over, elements described as "above" other elements or "below" other elements can then be oriented "below" other elements or "above" other elements. The devices can be oriented in any orientation, and the spatial descriptions used herein can be interpreted in accordance with such alternative orientations.

[0044] Flow diagrams are used herein to illustrate the operations performed by systems in accordance with embodiments of the present application. It is understood that the operations described or illustrated above or below are not necessarily performed in the precise order described. Rather, various steps can be handled in different order or simultaneously. Steps can also be added or removed from these processes, or one or more steps can be handled in these processes.

[0045] Embodiment One

[0046] Figure 1 is a structural schematic diagram of a material resistance testing device according to an embodiment of the present application. Referring to Figure 1 , the material resistance testing device mainly includes a groove body 10, the groove body 10 includes an anode groove body 101 and a cathode groove body 102, wherein the anode groove body 101 is internally provided with an anode plate 11, and the cathode groove body 102 is internally provided with a cathode plate 12. The anode plate 11 and the cathode plate 12 are used to connect a power supply to electrolyze electrolyte in the anode groove body 101 and the cathode groove body 102; further including a diaphragm 13, the diaphragm 13 is arranged between the anode groove body 101 and the cathode groove body 102, and a sample placing member 14 for placing a sample to be tested, the sample placing member 14 is arranged in the anode groove body 101 and / or the cathode groove body 102.

[0047] In the embodiment, as Figure 1As shown, the left side is the anode tank body 101, in which an acidic electrolyte, such as vanadium electrolyte, can be added, and the right side is the cathode tank body 102, in which another acidic electrolyte, such as sulfuric acid solution, can be added. Since the anode plate 11 and the cathode plate 12 are used to connect the power supply to electrolyze the electrolyte in the anode tank body 101 and the cathode tank body 102, after electrolysis of the electrolyte, a reducing environment can be provided in the cathode tank body 102, and an oxidizing environment can be provided in the anode tank body 101, and the electrolyte in the cathode tank body 102 and the anode tank body 101 is acidic electrolyte itself, therefore, the test device of the embodiment can simultaneously provide acidic, reducing and oxidizing test environments, facilitate the smooth performance of the above various resistance tests of the material to be tested in the same device, and solve the defect that the test environment of the existing test device is relatively single.

[0048] In an example, the device shown can further include a cover plate 15 cooperating with the anode tank body 101 and / or the cathode tank body 102 for sealing the opening of the anode tank body 101 and / or the cathode tank body 102. After the anode tank body 101 and / or the cathode tank body 102 is sealed, on the one hand, the test environment in the tank body 10 is isolated from other external environments, so that the test result is more accurate; on the other hand, the cover plate 15 is provided, which can also ensure the safety of the test personnel during the test.

[0049] For example, the cover plate 15 in the embodiment can be a whole plate, the area of which is roughly equal to the opening area of the tank body 10 (the total opening area of the anode tank body 101 and the cathode tank body 102), which can simultaneously seal the anode tank body 101 and the cathode tank body 102; in addition, the cover plate 15 can also be divided into two parts, one part for sealing the anode tank body 101 and the other part for sealing the cathode tank body 102, and the sealing of the two areas is more independent and does not affect each other.

[0050] In an example, one side of the cover plate 15 is movably connected with one side of the anode tank body 101 and / or the cathode tank body 102, or the cover plate 15 is a separate structure separated from the anode tank body 101 and the cathode tank body 102.

[0051] For example, when one side of the cover plate 15 is movably connected with one side of the anode tank body 101 and / or the cathode tank body 102, referring to Figure 1 , the connecting edge E1 of the cover plate 15 is movably connected with the tank body 10, such as using hinges, shafts and the like, which are not specifically limited herein, and the other side of the cover plate 15, i.e. the moving edge E2, can rotate around the connecting edge E1 of the cover plate 15, thereby realizing the sealing and opening functions of the opening of the tank body 10.

[0052] When the cover plate 15 is a structure separated from the anode groove body 101 and the cathode groove body 102, that is, the cover plate 15 and the groove body 10 are independent of each other in structure, and there is no physical connection between them. The cover plate 15 is an independent accessory of the test device. When the cover plate 15 is needed during the use of the device, the cover plate 15 can be placed on the opening of the groove body 10 by a suitable method. Compared with the above-mentioned movable connection mode, the independent structure has the advantages that whether the test device needs the cover plate 15 can be determined according to the situation. When the cover plate 15 is not needed, the test device is simpler. The cover plate 15 of the movable connection mode has become one of the connected components of the test device, which exists whether it is used or not. The disadvantage of the independent structure is that the sealing effect of the independent cover plate 15 is not as good as that of the former.

[0053] In an example, the test device can also be provided with a breathing valve 16, which is arranged on the cover plate 15. When the test device has the cover plate 15, the groove body 10 forms a sealed structure. Some gas will be generated during the test of the device, which is not conducive to the discharge of the gas. Therefore, a corresponding breathing valve 16 needs to be arranged. Exemplarily, the breathing valve 16 can be arranged on the cover plate 15 on the cathode groove body 102 side, or on the cover plate 15 on the anode groove body 101 side, or on the cover plate 15 on both the cathode groove body 102 side and the anode groove body 101 side. It can be understood that the breathing valve 16 can be used for gas discharge during the resistance test, or other devices with similar functions can be used, which will not be listed one by one here.

[0054] In an example, the test device can also be provided with a liquid inlet valve 17, which is arranged on the cover plate 15. In the case of having the cover plate 15, the cover plate 15 is generally used to cover the groove body 10 before the electrolyte is added, so as to reduce the splashing of the electrolyte or the influence of the external environment. When the test device has the cover plate 15, the groove body 10 forms a sealed structure, and it is necessary to arrange a suitable liquid inlet to add the electrolyte. Therefore, a corresponding liquid inlet valve 17 needs to be arranged to add the electrolyte into the groove body 10 through the liquid inlet valve 17. Exemplarily, the liquid inlet valve 17 can be arranged on the cover plate 15 on the cathode groove body 102 side, or on the cover plate 15 on the anode groove body 101 side, or on the cover plate 15 on both the cathode groove body 102 side and the anode groove body 101 side. It can be understood that the liquid inlet valve 17 can be used to add the electrolyte into the groove body 10, or other devices with the same or similar functions can be used, which will not be listed one by one here.

[0055] In one example, the membrane 13 is a perfluorosulfonic acid proton exchange membrane. Perfluorosulfonic acid proton exchange membranes possess excellent heat resistance, mechanical properties, electrochemical properties, and chemical stability, allowing them to be used under harsh conditions such as strong acids, strong alkalis, and strong oxidizing agents. They are not only used as a key component of proton exchange membrane fuel cells but also widely applied in vanadium batteries, water electrolysis for hydrogen production, electrochemical synthesis, gas separation, and electrochemical sensors. They serve as solid electrolyte membranes in various electrochemical cells that rely on cation selective conduction. In this embodiment, the membrane 13 divides the tank 10 into a cathode tank 102 and an anode tank 101, employing a perfluorosulfonic acid proton exchange membrane, enabling this testing device to be used under more demanding testing conditions such as strong acids and strong oxidation.

[0056] In one example, the sample holder 14 includes a mesh 141 and at least one sample cage 142, wherein the mesh 141 is disposed inside the anode tank 101 and / or the cathode tank 102, and the sample cage 142 is connected to the mesh 141.

[0057] In this embodiment, the sample holder 14 is the place where the sample to be tested is placed. To facilitate the flexible testing of one or more samples by this testing device, such as... Figure 2 As shown, this device can employ a combination of a mesh 141 and sample cages 142. The mesh 141 is tightly bonded to the anode plate 11 or cathode plate 12 for electrical conductivity. One or more sample cages 142 are provided within the mesh 141 to hold endurance test samples, with the number of sample cages 142 determined by the number of samples to be tested. Furthermore, the mesh 141 can be made of titanium, preferably with an iridium-tantalum coating, and the sample cages 142 can be made of the same material as the mesh 141. The titanium sample cages 142 are electrically connected to the anode plate 11, maintaining a continuously oxygen-evolving, strongly oxidizing environment within the sample cages 142.

[0058] In this embodiment, the size of the mesh 141 is generally comparable to the internal size of the anode mesh 101 or the cathode mesh 102, and its shape is also the same as the internal shape of the anode mesh 101 or the cathode mesh 102. If the internal shape of the anode mesh 101 or the cathode mesh 102 is a square prism, then the shape of the mesh 141 is also a square prism; if the internal shape of the anode mesh 101 or the cathode mesh 102 is a cylinder, then the shape of the mesh 141 is also a cylinder.

[0059] In one example, the sample cage 142 has a hanging ear 143, which is hung on the mesh 141. The sample cage 142 is easily and flexibly hung on the mesh 141 by the hanging ear 143. Figure 3 As shown, the hanging ear 143 can be set at one location or at multiple locations on the sample cage 143. The design of the movable hanging ear type sample cage 143 can meet the requirement of testing multiple samples at the same time.

[0060] In an example, the anode tank 101 and the cathode tank 102 can be respectively provided with liquid discharge valves 18 for discharging the solution. Of course, other similar devices capable of achieving the liquid discharge function can also be used in the present embodiment, which will not be listed one by one here.

[0061] In an example, the anode tank 101 and the cathode tank 102 are respectively provided with liquid level tubes 19. During the test, the volume of the solution in the tank 10 will change, and the liquid level tubes 19 provided in the anode tank 101 and the cathode tank 102 can observe the volume change of the solution therein, that is, effectively monitor the liquid level in the tank 10, and the volume change of the solution can be known through the change of the solution liquid level. For example, when the volume of the solution in the tank 10 is observed to be reduced through the liquid level tube 19, pure water can be added in time to maintain the volume of the solution.

[0062] In the present embodiment, the cover plate 15, the tank 10, the tank net 141 and the pipeline valve and the like can be PP, PVDF, PTFE and the like high polymer materials with high corrosion resistance.

[0063] The material resistance test device provided in the present embodiment is provided with a tank, a diaphragm and a sample placing member for placing a sample to be tested, wherein the tank comprises an anode tank and a cathode tank, the anode tank is internally provided with an anode plate, and the cathode tank is internally provided with a cathode plate; the anode plate and the cathode plate are used to connect the power supply to electrolyze the electrolyte in the anode tank and the cathode tank; the diaphragm is arranged between the anode tank and the cathode tank; and the sample placing member is arranged in the anode tank and / or the cathode tank, thereby being able to simultaneously meet the test requirements of the electrolyte resistance to acidity, oxidation resistance and reduction resistance of the material, especially the vanadium battery material.

[0064] Embodiment two

[0065] Figure 4 is a flowchart of a method for using the material resistance test device according to an embodiment of the present application, and the method 400 shown in Figure 4 can be applied to the material resistance test device shown in Embodiment One, which comprises:

[0066] 410, respectively injecting electrolyte into the anode tank and the cathode tank, wherein the anode tank and the cathode tank are both injected with acidic electrolyte.

[0067] For example, using the above-mentioned test device, first close the cover plate 15, and then inject electrolyte into the cathode tank 102 and the anode tank 101 through the liquid inlet valve 17.

[0068] In one example, vanadium electrolyte is injected into the cathode tank 102, and 25-30wt% sulfuric acid solution is injected into the anode tank 101 for testing the resistance of vanadium battery materials.

[0069] 420, connecting the anode plate and the cathode plate to an electrolysis power source and passing an electrolysis current.

[0070] In one example, the current density of the electrolysis current can be 100-300mA / cm 2 The electrolysis time t is calculated by the following formula:

[0071]

[0072] In the formula, t is the electrolysis time, in seconds; C is the concentration of vanadium electrolyte, in mol / L; V is the volume of injected vanadium electrolyte, in liters; ā is the average valence of vanadium ions in the initial vanadium electrolyte, in mol / L; F is the Faraday constant, taking 96485.3 C / mol; and I is the electrolysis current, in A.

[0073] 430, stopping the power supply after the electrolysis process is completed, and placing the material to be tested (the sample to be tested) in the electrolyte in the anode tank and / or the cathode tank, wherein a reducing environment is provided in the cathode tank and an oxidizing environment is provided in the anode tank.

[0074] For example, the material to be tested is cut or cut into a sample of appropriate size, which is placed in the sample cage 142 of the cathode tank 102 and the anode tank 101 respectively, and the sample cage 142 is fixed to the tank mesh 141 of the cathode tank 102 and the anode tank 101 by the hanging ear 143, so that the sample to be tested is completely immersed in the solution, the cover plate 15 is closed, and the resistance test of the material is started.

[0075] 440, passing a test current to test the resistance of the material to be tested.

[0076] In one example, the current density of the test current is 10-20mA / cm 2 The electrolysis is continued until the end of the material resistance test. For example, the cathode is maintained near +2 valence by micro-current electrolysis, maintaining high reducibility.

[0077] Further, during the test of the sample to be tested, the electrolyte level in the anode tank 101 and / or the cathode tank 102 can also be monitored to supplement pure water to maintain the electrolyte volume.

[0078] For example, using the test device as described above, the liquid level in the tank 10 is monitored by the liquid level pipe 19, and pure water is supplemented by the liquid inlet valve 17 to maintain the solution volume.

[0079] In the embodiment, the cathode adopts vanadium electrolyte solution, the anode adopts sulfuric acid solution, the average valence of vanadium ions in the vanadium electrolyte in the cathode tank 102 is about +2 in a short time through preliminary large current electrolysis, a reducing environment is provided for material resistance test, and the solution system is maintained in the reducing state through continuous micro-current electrolysis; the sample cage 142 in the anode tank 101 is hung on the tank net 141 and in contact with the anode plate 11 for conduction, so that the sample cage 142 becomes the reaction place of anode electrolytic water, and the surface is enriched with strong oxidizing oxygen free radicals, thereby providing an oxidizing environment for material resistance test; meanwhile, the vanadium electrolyte and the anode acid solution are both acidic solutions, thereby providing an acidic environment for material resistance test. It can be seen that, by using the method provided in the embodiment, the test requirements of the material, especially the vanadium battery material, for acid resistance, oxidation resistance and reduction resistance of the electrolyte can be met at the same time.

[0080] The foregoing description has been directed to certain embodiments. This application is not limited to the embodiments described, since modifications and variations can be made to the described embodiments. It is intended that the application embrace all such modifications and variations as fall within the scope of the appended claims. Other objects and many of the intended advantages of the application will be apparent to those of ordinary skill in the art upon reading the foregoing description.

[0081] Also, the use of "a" or "an" to describe elements in the application is intended to be generic and inclusive, meaning that there can be one or more than one element. Furthermore, the use of the term "including" as well as other forms such as "include", "includes," "comprise," "comprises," "comprising," "containing," "contains," or "contain" should be considered inclusive or open ended and not exclusive or specific. That is, the use of any of these terms will mean that there are other elements or steps that are not listed, and thus the claim will encompass any of the possible elements or steps.

[0082] Similarly, it is also noted that, in the development of this application, numerous implementing specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced without such specific details. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense.

[0083] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0084] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A material resistance testing device, characterized by, The application relates to a device for testing the corrosion resistance of a sample, comprising: a groove body, which comprises an anode groove body and a cathode groove body; wherein the anode groove body is internally provided with an anode plate and the anode groove is internally provided with a first acid electrolyte, and the cathode groove body is internally provided with a cathode plate and the cathode groove is internally provided with a second acid electrolyte; the anode plate and the cathode plate are used for connecting a power supply to electrolyze the electrolyte in the anode groove body and the cathode groove body, so that an oxidizing environment is provided in the anode groove and a reducing environment is provided in the cathode groove; a diaphragm is arranged between the anode groove body and the cathode groove body; a sample placing member is arranged in the anode groove body and / or the cathode groove body, and is used for placing a sample to be tested.

2. The material resistance testing apparatus of claim 1, wherein a cover plate is further arranged, which cooperates with the anode groove body and / or the cathode groove body, and is used for sealing the opening of the anode groove body and / or the cathode groove body.

3. The material resistance testing apparatus of claim 2, wherein One side of the cover plate is movably connected with one side of the anode groove body and / or the cathode groove body, or the cover plate is an independent structure which is separated from the anode groove body and the cathode groove body.

4. The material resistance testing apparatus of claim 2, wherein A breathing valve is further arranged on the cover plate.

5. The material resistance testing apparatus of claim 2, wherein An inlet valve is further arranged on the cover plate.

6. The material resistance testing apparatus of claim 1, wherein The diaphragm is a perfluorosulfonic acid proton membrane.

7. The material resistance testing apparatus of claim 1, wherein The sample placing member comprises a groove net and at least one sample cage, wherein the groove net is arranged in the anode groove body and / or the cathode groove body, and the sample cage is connected to the groove net.

8. The material resistance testing apparatus of claim 7, wherein The sample cage is provided with a hanging ear which is hung on the groove net.

9. The material resistance testing apparatus of claim 1, wherein Liquid outlet valves are arranged on the anode groove body and the cathode groove body respectively.

10. The material resistance testing apparatus of claim 1, wherein, Liquid level tubes are arranged on the anode groove body and the cathode groove body respectively.

11. A method of using a material resistance testing device, suitable for use with a material resistance testing device according to any one of claims 1 to 10, characterized in that, The application further relates to a method for testing the corrosion resistance of a sample, comprising the following steps: injecting electrolyte into the anode groove body and the cathode groove body respectively, wherein acid electrolyte is injected into the anode groove body and the cathode groove body; connecting the anode plate and the cathode plate to an electrolysis power supply and inputting electrolysis current; stopping the input of the electrolysis current after the electrolysis process is completed, placing the sample to be tested in the electrolyte in the anode groove body and / or the cathode groove body, wherein a reducing environment is provided in the cathode groove body and an oxidizing environment is provided in the anode groove body; inputting test current to test the corrosion resistance of the sample.

12. The method of use of claim 11, wherein, Vanadium electrolyte is injected into the cathode groove body, and a 25-30wt% sulfuric acid solution is injected into the anode groove body.

13. The method of use of claim 11, wherein, The current density of the electrolysis current is 100-300 mA / cm 2 The electrolysis time t is calculated by the following formula: In the formula, t is electrolysis time, unit: s; C is vanadium electrolyte concentration, unit: mol / L; V is the volume of vanadium electrolyte, unit: L; is the average valence of vanadium ions in the vanadium electrolyte, unit: mol / L; F is Faraday constant, 96485.3 C / mol; I is electrolysis current, unit: A.

14. The method of use of claim 11, wherein, The test current has a current density of 10-20 mA / cm 2 .

15. The method of use of claim 11, wherein, The application further relates to a method for testing the corrosion resistance of a sample, comprising the following steps: monitoring the electrolyte level in the anode groove body and / or the cathode groove body during the test of the sample to be tested, and adding pure water to maintain the electrolyte volume.

Images