A high pressure aluminum foil corrosion pore experiment device

Abstract

The utility model discloses a high pressure aluminum foil corrosion hole forming experimental device, apply to experimental device technical field to solve the poor stability of the concentration of etching liquid in the high pressure aluminum foil corrosion hole forming experimental device in the prior art, specifically includes: the etching tank is loaded with etching liquid, the electrode assembly is set up in the inside of etching tank, and the electrode assembly is connected with the negative pole of external power, the liquid level acquisition module is set up in the inside of etching tank, and the output of liquid level acquisition module is electrically connected with the control end of liquid level adjusting module, liquid level acquisition module is used to gather the liquid level of etching liquid, the liquid inlet of liquid level adjusting module is connected with external water source, and the liquid outlet of liquid level adjusting module leads to the inside of etching tank, liquid level adjusting module is used to when the liquid level of etching liquid is lower than the preset threshold value, and the water is injected into the etching tank. The constant of etching liquid level is effectively kept, and then the relative stability of etching liquid concentration is guaranteed, and the uniformity of corrosion hole forming process and the repeatability of experimental result are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of experimental device technology, and in particular to an experimental device for high-pressure aluminum foil corrosion and porosity formation. Background Technology

[0002] Aluminum electrolytic capacitors are key components widely used in electronic devices, and their performance directly affects their capacitance, withstand voltage, and lifespan. The anode foil, the core material of aluminum electrolytic capacitors, is typically made of high-purity aluminum foil that undergoes electrochemical etching to form numerous microscopic tunnel pore structures on its surface, significantly increasing the effective surface area and improving capacitor performance. A typical etching process includes four stages: pretreatment, primary pore formation, secondary pore enlargement, and post-treatment. Primary pore formation is the crucial step in forming the initial pore structure and has a decisive impact on subsequent pore enlargement and overall etching quality.

[0003] To achieve uniform porosity on the aluminum foil surface, a mixed etching solution of hydrochloric acid and sulfuric acid is typically used in the primary etching process, and the solution is heated to 60–80°C to improve reaction efficiency. However, under high-temperature conditions, a large amount of hydrogen and other gases are generated during the etching reaction. These bubbles escape from the aluminum foil surface and enter the etching solution, causing severe disturbance at the gas-liquid interface and accelerating moisture evaporation. Moisture evaporation not only affects the stability of the etching solution but also causes a shift in the concentration ratio of hydrochloric acid and sulfuric acid (i.e., the T1 / T2 acidity ratio), disrupting the originally set etching conditions. Furthermore, as the total amount of etching solution decreases, the contact state between the aluminum foil and the electrode changes, further exacerbating the inconsistency of the etching process, resulting in poor repeatability of experimental results and significant fluctuations in product quality.

[0004] Currently, the high-pressure aluminum foil corrosion porosity experimental device uses manual timed water replenishment to alleviate water evaporation. However, since the water evaporation rate is affected by various factors such as temperature and gas escape rate, it exhibits dynamic change characteristics. Manual water replenishment cannot achieve real-time control of the corrosion liquid level and concentration, making it difficult to fundamentally solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a high-pressure aluminum foil corrosion and porosity test device to solve the problem of poor stability of the corrosion solution concentration in existing high-pressure aluminum foil corrosion and porosity test devices.

[0006] The technical solution provided by this utility model is as follows: This utility model provides a high-pressure aluminum foil corrosion porosity experimental device, including: corrosion tank, electrode assembly, liquid level acquisition module and liquid level adjustment module; The corrosion tank contains a corrosive solution; the electrode assembly is located inside the corrosion tank and is connected to the negative terminal of an external power source. The liquid level acquisition module is located inside the corrosion tank, and its output terminal is electrically connected to the control terminal of the liquid level adjustment module; the liquid level acquisition module is used to acquire the liquid level of the corrosion liquid. The liquid level adjustment module has its inlet connected to an external water source and its outlet connected to the interior of the corrosion tank. The liquid level adjustment module is used to inject water into the corrosion tank when the liquid level of the corrosion solution is lower than a preset threshold.

[0007] Optionally, the liquid level adjustment module includes: a liquid level regulating valve and a control module; The liquid level regulating valve is connected to an external water source through an inlet pipe, and connected to the corrosion tank through an outlet pipe; the control terminal of the liquid level regulating valve is connected to the output terminal of the control module. The input terminal of the control module is connected to the output terminal of the liquid level acquisition module.

[0008] Optionally, the liquid level acquisition module includes: a non-contact liquid level sensor; The non-contact liquid level sensor is installed on the side wall of the corrosion tank or the inner wall of the corrosion tank cover. The non-contact liquid level sensor is positioned facing the surface of the corrosion liquid, and the output terminal of the non-contact liquid level sensor is electrically connected to the control module.

[0009] Optionally, the liquid level acquisition module includes: a contact liquid level sensor; The contact level sensor is installed on the side wall or bottom of the corrosion tank. The contact level sensor is in contact with the corrosion liquid, and its output terminal is electrically connected to the control module.

[0010] Optionally, the high-pressure aluminum foil corrosion pitting test apparatus may also include: a circulation module; The circulation module is connected to the inside of the corrosion tank and is used to drive the corrosion liquid to flow continuously in the corrosion tank and circulation pipeline.

[0011] Optionally, the circulation module includes: a circulation pump and circulation piping; The inlet and outlet of the circulation pipeline are connected to the inside of the corrosion tank, forming a closed loop; the circulation pump is installed on the circulation pipeline.

[0012] Optionally, the corrosion tank includes: an outer tank and a reaction tank disposed inside the outer tank; The reaction tank holds the corrosive liquid and houses the electrode assembly; the side wall or bottom of the reaction tank is provided with a channel communicating with the outer tank; the corrosive liquid in the reaction tank and the corrosive liquid in the outer tank flow through the channel.

[0013] Optionally, the high-pressure aluminum foil corrosion pitting test apparatus may also include: a heating element; The control terminal of the heating element is electrically connected to the control module; The heating element includes at least one of the following: a heating rod disposed in the outer tank, a heating jacket wrapped around the outer wall of the reaction tank, and a tubular heater disposed on the circulation pipeline.

[0014] Optionally, the high-pressure aluminum foil corrosion porosity experimental device also includes: a concentration acquisition module; The concentration acquisition module is located inside the outer tank and is immersed in the corrosion solution. The output terminal of the concentration acquisition module is electrically connected to the control module. The concentration acquisition module is used to acquire the concentration of the corrosive solution.

[0015] Optionally, the concentration acquisition module includes: a conductivity sensor and / or a pH sensor.

[0016] The beneficial effects of this utility model are as follows: In this invention, the high-pressure aluminum foil corrosion porosity experimental device monitors the level of the corrosion solution in the corrosion tank in real time through a liquid level acquisition module, and automatically replenishes water when the liquid level of the corrosion solution is lower than a preset threshold through a liquid level adjustment module. This effectively maintains a constant liquid level of the corrosion solution, thereby ensuring a relatively stable concentration of the corrosion solution. It significantly improves the uniformity of the corrosion porosity process and the repeatability of the experimental results, greatly improves the accuracy and automation level of the experimental device, and reduces manual intervention.

[0017] Other features and advantages of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the first structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 2 This is a schematic diagram of the second structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 3 This is a schematic diagram of the third structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 4 This is a schematic diagram of the fourth structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 5This is a schematic diagram of the fifth structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 6 This is a schematic diagram of the sixth structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 7 This is a schematic diagram of the seventh structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment; Figure 8 This is a schematic diagram of the eighth structure of the high-pressure aluminum foil corrosion porosity experimental device in this utility model embodiment.

[0019] Icons: 1-Etching tank; 2-Electrode assembly; 3-Level acquisition module; 4-Level adjustment module; 5-Etching solution; 6-Aluminum foil; 7-Level regulating valve; 8-Control module; 9-Cover; 10-Non-contact level sensor; 11-Circulation module; 12-Circulation pump; 13-Circulation pipeline; 14-Outer tank; 15-Reaction tank; 16-Concentration acquisition module. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model embodiment provides a high-pressure aluminum foil corrosion and pitting experimental device, see reference. Figure 1 As shown, the high-pressure aluminum foil corrosion porosity experimental device includes at least: corrosion tank 1, electrode assembly 2, liquid level acquisition module 3 and liquid level adjustment module 4; The corrosion tank 1 contains the corrosion liquid 5; the electrode assembly 2 is located inside the corrosion tank 1 and is connected to the negative terminal of an external power source. The liquid level acquisition module 3 is installed inside the corrosion tank 1, and the output end of the liquid level acquisition module 3 is electrically connected to the control end of the liquid level adjustment module 4; the liquid level acquisition module 3 is used to acquire the liquid level of the corrosion liquid 5. The inlet of the liquid level adjustment module 4 is connected to an external water source, and the outlet of the liquid level adjustment module 4 leads to the interior of the corrosion tank 1. The liquid level adjustment module 4 is used to inject water into the corrosion tank 1 when the liquid level of the corrosion liquid 5 is lower than a preset threshold.

[0022] exist Figure 1In the high-pressure aluminum foil corrosion porosity experimental apparatus shown, the corrosion tank 1 is the main container for the corrosion porosity experiment. The corrosion tank 1 contains a corrosion solution 5 of predetermined concentration and composition. The material of the corrosion tank 1 is preferably a corrosion-resistant non-metallic material, such as polypropylene (PP), polytetrafluoroethylene (PTFE), or glass, to ensure that it does not react with the corrosion solution 5 during long-term experiments, thus guaranteeing the accuracy of the experiment. The electrode assembly 2 is located inside the corrosion tank 1 and is used to construct the working circuit for the corrosion electrochemical reaction. Specifically, the electrode assembly 2 includes one or more auxiliary electrodes (such as inert electrodes). During the experiment, the aluminum foil 6 to be tested is connected to the positive terminal of an external DC power supply via a wire and placed in the electrode assembly 2. The liquid level acquisition module 3 monitors the liquid level of the corrosion solution 5 in the corrosion tank 1 in real time. The output terminal of the liquid level acquisition module 3 is electrically connected to the control terminal of the liquid level adjustment module 4. The liquid level adjustment module 4 is used to automatically replenish the liquid according to the signal from the liquid level acquisition module 3. The inlet terminal of the liquid level adjustment module 4 is connected to an external water source, while the outlet terminal leads into the corrosion tank 1. The external water source is typically deionized water or purified water. When the level acquisition module 3 detects that the level of the corrosion solution 5 has dropped to a preset threshold due to evaporation or other reasons, it sends a control signal to the level adjustment module 4. Upon receiving the signal, the level adjustment module 4 automatically starts, injecting an appropriate amount of water into the corrosion tank 1 until the level returns to the normal range. This ensures a constant level of the corrosion solution 5 throughout the experiment, thereby guaranteeing a relatively stable concentration of the corrosion solution 5, greatly improving the accuracy and automation of the experiment, and reducing manual intervention.

[0023] In one possible implementation, see [reference] Figure 2 As shown, the liquid level adjustment module 4 includes: a liquid level regulating valve 7 and a control module 8; The liquid level regulating valve 7 is connected to an external water source through an inlet pipe, and the liquid level regulating valve 7 is connected to the corrosion tank 1 through an outlet pipe; the control terminal of the liquid level regulating valve 7 is connected to the output terminal of the control module 8. The input terminal of the control module 8 is connected to the output terminal of the liquid level acquisition module 3.

[0024] exist Figure 2In the high-pressure aluminum foil corrosion porosity experimental apparatus shown, the control module 8 can be a microcontroller (MCU), a programmable logic controller (PLC), or a simple relay circuit. Its input terminal is electrically connected to the output terminal of the liquid level acquisition module 3 to receive liquid level signals. The control module 8 has preset liquid level control logic; for example, when the received signal indicates that the liquid level is below a preset threshold, its output terminal outputs an "open" signal; when the liquid level recovers to the preset threshold, it outputs a "close" signal. The liquid level regulating valve 7 is an electrically controlled valve, such as a solenoid valve. The control terminal of the liquid level regulating valve 7 is connected to the output terminal of the control module 8. The valve body's inlet is connected to an external water source through an inlet pipe, and the valve body's outlet extends into the corrosion tank 1 through an outlet pipe. When the control module 8 outputs an "open" signal, the solenoid valve is energized and opens, allowing water from the external source to flow into the corrosion tank 1 through the pipe; when the control module 8 outputs a "close" signal, the solenoid valve is de-energized and closes, stopping water injection.

[0025] In one possible implementation, see [reference] Figure 3 and Figure 4 As shown, the liquid level acquisition module includes: a non-contact liquid level sensor 10; The non-contact liquid level sensor 10 is disposed on the side wall of the corrosion tank 1 or the inner wall of the cover 9 of the corrosion tank 1. The non-contact liquid level sensor 10 is positioned facing the surface of the corrosion liquid 5. The output terminal of the non-contact liquid level sensor 10 is electrically connected to the control module 8.

[0026] In practical applications, the non-contact liquid level sensor 10 can be an ultrasonic liquid level sensor or a radar liquid level sensor. (See also...) Figure 3 As shown, the non-contact liquid level sensor 10 can be installed on the inner wall of the cover 9 of the corrosion tank 1, with the probe of the non-contact liquid level sensor 10 facing downwards and directly towards the surface of the corrosive liquid 5; see reference Figure 4 As shown, the non-contact liquid level sensor 10 can also be installed on the upper side wall of the corrosion tank 1, with its probe also facing the liquid surface. The sensor calculates the distance from the sensor to the liquid surface based on the round-trip time of sound or electromagnetic waves, thereby determining the actual liquid level. Since the non-contact liquid level sensor 10 does not directly contact the corrosive liquid 5, corrosion problems are fundamentally avoided, ensuring long-term operational reliability and preventing contamination of the corrosive liquid 5. The output of the non-contact liquid level sensor 10 is directly electrically connected to the aforementioned control module 8 to transmit liquid level data.

[0027] In one possible implementation, the liquid level acquisition module includes: a contact liquid level sensor; The contact level sensor is installed on the side wall or bottom of the corrosion tank. The contact level sensor is in contact with the corrosion liquid, and its output terminal is electrically connected to the control module.

[0028] In practical applications, contact-type level sensors can also be used in level acquisition modules. Examples include float level switches or submersible level gauges. When using contact sensors, the probe or sensing part needs to be immersed in the corrosive liquid. Therefore, all components of a contact-type level sensor that come into contact with the corrosive liquid must be made of highly corrosion-resistant materials, such as PTFE or metal coated with a corrosion-resistant coating. For example, a float switch made of PTFE can be installed on the side wall or bottom of the corrosion tank. When the liquid level drops, the float drops, triggering an internal reed switch, which outputs a switching signal to the control module.

[0029] In one possible implementation, see [reference] Figure 5 As shown, the high-pressure aluminum foil corrosion porosity experimental device also includes: a circulation module 11; The circulation module 11 is connected to the inside of the corrosion tank 1, and the circulation module 11 is used to drive the corrosion liquid 5 to flow continuously in the corrosion tank 1 and the circulation pipeline.

[0030] In practical applications, during static corrosion experiments, the concentration of the etching solution 5 near the surface of the aluminum foil 6 being tested decreases due to reaction consumption, while the reaction products locally accumulate, forming a concentration gradient and affecting the subsequent corrosion rate. A circulation module 11 connected to the inside of the corrosion tank 1 is added to drive the continuous flow of the etching solution 5 within the corrosion tank 1.

[0031] For details, please refer to Figure 6 As shown, the high-pressure aluminum foil corrosion porosity experimental apparatus includes a circulation module 11 comprising a circulation pump 12 and a circulation pipeline 13. The inlet and outlet of the circulation pipeline 13 are both connected to the inside of the corrosion tank 1, forming a closed loop; the circulation pump 12 is installed on the circulation pipeline 13.

[0032] exist Figure 6 In the high-pressure aluminum foil corrosion porosity test apparatus shown, both the inlet and outlet of the circulation pipe 13 are connected to the interior of the corrosion tank 1, forming a closed circulation loop. The circulation pump 12 can be a corrosion-resistant magnetic pump or a diaphragm pump. When the circulation pump 12 is working, the corrosion solution 5 is drawn from the bottom of the corrosion tank 1, pumped back to the corrosion tank 1 from the top through the circulation pipe 13, thereby forcing the corrosion solution 5 to circulate. This continuous circulation can effectively eliminate uneven concentration of the corrosion solution 5, ensuring that the aluminum foil 6 under test is always exposed to a uniform and constant experimental environment, thus ensuring the accuracy and consistency of the experimental results.

[0033] In one possible implementation, see [reference] Figure 7 As shown, the corrosion tank 1 includes: an outer tank 14 and a reaction tank 15 disposed inside the outer tank 14; The reaction tank 15 holds the corrosion liquid 5 and accommodates the electrode assembly 2; the side wall or bottom of the reaction tank 15 is provided with a channel communicating with the outer tank 14; the corrosion liquid 5 in the reaction tank 15 and the corrosion liquid 5 in the outer tank 14 flow through the channel.

[0034] exist Figure 7 In the high-pressure aluminum foil corrosion and porosimetry experimental apparatus shown, the reaction tank 15 is the core area for the corrosion and porosimetry reaction. Its size matches the aluminum foil 6 to be tested and is used to accommodate the electrode assembly 2 and a small amount of etching solution 5. The outer tank 14 surrounds the reaction tank 15 and contains most of the etching solution 5. At least one channel communicating with the outer tank 14 is provided on the side wall or bottom of the reaction tank 15, allowing the etching solution 5 in the reaction tank 15 to flow freely with the etching solution 5 in the outer tank 14. In this way, auxiliary functional modules such as heating, temperature measurement, concentration measurement, and water replenishment can be placed in the more spacious outer tank 14, avoiding interference from these modules with the electric field inside the reaction tank 15 and ensuring the purity of the electrochemical reaction environment. The large amount of etching solution 5 in the outer tank 14 forms a huge buffer pool, making the temperature and concentration of the entire apparatus more stable and less prone to drastic fluctuations due to changes in the external environment or water replenishment operations. The inlet and outlet of the circulation pipeline 13 can be easily connected to the outer tank 14 to indirectly and gently agitate the liquid in the reaction tank 15, ensuring uniformity while avoiding strong liquid scouring that would physically interfere with the corrosion process of the aluminum foil 6 under test.

[0035] In one possible implementation, in order to achieve precise control of the experimental temperature, the high-pressure aluminum foil corrosion porosimetry experimental apparatus further includes: a heating element; The control terminal of the heating element is electrically connected to the control module; The heating element includes at least one of the following: a heating rod disposed in the outer tank, a heating jacket wrapped around the outer wall of the reaction tank, and a tubular heater disposed on the circulation pipeline.

[0036] In practical applications, heating is achieved by directly placing one or more heating rods coated with corrosion-resistant materials into the corrosive liquid within the outer tank. This method is direct and offers high heating efficiency. The heating jacket, a flexible heating sleeve or film covering the outer wall of the reaction tank, enables uniform heating and precise temperature control of the core reaction zone. Tubular heaters can be installed on the circulation pipeline, heating the corrosive liquid as it flows through, integrating heating and circulation functions, resulting in rapid heating and uniform temperature distribution. Optionally, the above heating methods can be combined according to actual needs to achieve optimal temperature control.

[0037] In one possible implementation, see [reference] Figure 8 As shown, the high-pressure aluminum foil corrosion porosity experimental device also includes: a concentration acquisition module 16; The concentration acquisition module 16 is installed inside the outer tank 14 and is immersed in the corrosion solution 5. The output terminal of the concentration acquisition module 16 is electrically connected to the control module 8. The concentration acquisition module 16 is used to acquire the concentration of the corrosive liquid 5.

[0038] exist Figure 8 In the high-pressure aluminum foil corrosion porosity experimental apparatus shown, although the liquid level acquisition module 3 and the liquid level adjustment module 4 can maintain a stable liquid level, the effective components (such as Cl-) in the corrosion solution 5 will be consumed during long-term or high-reaction-rate experiments, resulting in slight changes in concentration. Therefore, a concentration acquisition module 16 is provided to monitor the concentration of the corrosion solution 5 in real time. The output of the concentration acquisition module 16 is electrically connected to the control module 8, which can display or record the acquired concentration data in real time. The concentration acquisition module 16 is preferably located inside the outer tank 14, with its probe immersed in the corrosion solution 5. This ensures accurate measurement of the concentration of the main solution without interfering with the electrochemical process within the reaction tank 15.

[0039] In one possible implementation, the concentration acquisition module includes a conductivity sensor and / or a pH sensor.

[0040] In practical applications, for ionic corrosive solutions, the conductivity is strongly correlated with the ion concentration. By setting up a conductivity sensor to measure the conductivity of the corrosive solution in real time, changes in the concentration of the corrosive solution can be reflected very sensitively. For acidic or alkaline corrosive solutions, pH value is a key parameter characterizing their corrosive ability. By setting up a pH sensor to monitor the pH value in real time, changes in the corrosive environment can be accurately understood.

[0041] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0042] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of the embodiments of this utility model. Therefore, if these modifications and variations to the embodiments of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.

Claims

1. A high-pressure aluminum foil corrosion porosity experimental apparatus, characterized in that, include: Corrosion tank, electrode assembly, liquid level acquisition module and liquid level adjustment module; The corrosion tank contains a corrosive liquid; the electrode assembly is disposed inside the corrosion tank and is connected to the negative terminal of an external power source. The liquid level acquisition module is installed inside the corrosion tank, and the output terminal of the liquid level acquisition module is electrically connected to the control terminal of the liquid level adjustment module; the liquid level acquisition module is used to acquire the liquid level of the corrosion liquid. The inlet of the liquid level adjustment module is connected to an external water source, and the outlet of the liquid level adjustment module leads to the interior of the corrosion tank. The liquid level adjustment module is used to inject water into the corrosion tank when the liquid level of the corrosion liquid is lower than a preset threshold.

2. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 1, characterized in that, The liquid level adjustment module includes: a liquid level regulating valve and a control module; The liquid level regulating valve is connected to an external water source through an inlet pipe, and the liquid level regulating valve is connected to the corrosion tank through an outlet pipe; the control terminal of the liquid level regulating valve is connected to the output terminal of the control module. The input terminal of the control module is connected to the output terminal of the liquid level acquisition module.

3. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 2, characterized in that, The liquid level acquisition module includes: a non-contact liquid level sensor; The non-contact liquid level sensor is disposed on the side wall of the corrosion tank or the inner wall of the cover of the corrosion tank. The non-contact liquid level sensor is positioned facing the surface of the corrosive liquid, and the output terminal of the non-contact liquid level sensor is electrically connected to the control module.

4. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 2, characterized in that, The liquid level acquisition module includes: a contact liquid level sensor; The contact-type liquid level sensor is disposed on the side wall or bottom of the corrosion tank, and is in contact with the corrosion liquid. The output terminal of the contact-type liquid level sensor is electrically connected to the control module.

5. The high-pressure aluminum foil corrosion porosity experimental apparatus according to any one of claims 2-4, characterized in that, Also includes: Loop module; The circulation module is connected to the inside of the corrosion tank, and the circulation module is used to drive the corrosion liquid to flow continuously in the corrosion tank and the circulation pipeline.

6. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 5, characterized in that, The circulation module includes: a circulation pump and circulation pipelines; The inlet and outlet of the circulation pipeline are both connected to the inside of the corrosion tank, forming a closed loop; the circulation pump is installed on the circulation pipeline.

7. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 5, characterized in that, The corrosion tank includes: an outer tank and a reaction tank disposed inside the outer tank; The reaction tank holds the corrosive liquid and houses the electrode assembly; the side wall or bottom of the reaction tank is provided with a channel communicating with the outer tank; the corrosive liquid in the reaction tank and the corrosive liquid in the outer tank flow through the channel.

8. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 7, characterized in that, Also includes: Heating element; The control terminal of the heating element is electrically connected to the control module; The heating element includes at least one of the following: a heating rod disposed in the outer tank, a heating sleeve wrapped around the outer wall of the reaction tank, and a tubular heater disposed on the circulation pipeline.

9. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 8, characterized in that, Also includes: Concentration acquisition module; The concentration acquisition module is disposed in the outer tank and is immersed in the corrosion solution. The output terminal of the concentration acquisition module is electrically connected to the control module. The concentration acquisition module is used to acquire the concentration of the corrosive liquid.

10. The high-pressure aluminum foil corrosion porosity experimental apparatus according to claim 9, characterized in that, The concentration acquisition module includes: a conductivity sensor and / or a pH sensor.

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