A kind of carbon-coated aluminum foil coating corrosion resistance detection equipment and determination method

Abstract

This invention discloses a device and method for testing the corrosion resistance of carbon-coated aluminum foil. The invention relates to the field of coating corrosion resistance testing technology, and includes a base on which a test chamber, a controller, and a support are mounted. The test chamber contains a spray head and a clamp for holding the carbon-coated aluminum foil. The support is hinged to two side mounting frames. A hydraulic cylinder is also hinged to the test chamber and to the two side mounting frames, causing a moving component to operate and drive a scraping and collecting component to reciprocate on the inner wall of a transparent cover. This scrapes and collects droplets on the inner wall of the transparent cover above the sample. Each time the scraping and collecting component moves directly above the groove, a discharge component discharges the collected liquid into the groove. This prevents droplets on the inner wall of the transparent cover from condensing into large droplets that fall vertically onto the sample, thus avoiding localized abnormal corrosion of the sample and ensuring the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of coating corrosion resistance testing technology, specifically to a device and method for testing the corrosion resistance of carbon-coated aluminum foil coatings. Background Technology

[0002] Carbon-coated aluminum foil is a material used to extend battery pack life. It is made of nano-conductive graphite composite with aluminum or copper foil. This material forms a double-sided conductive carbon layer on the aluminum foil surface through a roll-to-roll coating process, and is mainly used as the positive electrode current collector in lithium iron phosphate power batteries and lithium-sulfur batteries. To verify the coating's shielding ability against the aluminum foil substrate, its resistance to environmental corrosion, and its long-term durability, corrosion resistance testing of the carbon-coated aluminum foil coating is necessary. Currently, this is generally achieved using a salt spray test chamber. A salt spray test chamber is an artificial climate test device that simulates a salt spray environment. It is mainly used to test the corrosion resistance of components, electronic components, metal protective layers, and industrial products, conforming to standards such as GB / T2423.17, and is suitable for fields such as machinery, electronics, and defense. It supports various test types, including neutral salt spray, acetic acid spray, and copper-accelerated acetic acid spray. The equipment is equipped with a fully transparent impact-resistant observation cover and a stainless steel saturated air tank, with a built-in PID temperature control system (accuracy ±0.1℃) and automatic water replenishment function, maintaining a test temperature of 35℃-63℃. The salt spray is evenly distributed through non-crystallizing glass nozzles and an intelligent spray system. It is equipped with a direct steam heating device, dual over-temperature protection and multiple circuit protection systems, and supports continuous or periodic spray modes.

[0003] Existing test chambers typically have triangular transparent tops to allow salt spray condensate to flow away along the slope, preventing it from dripping onto the sample. This is because large droplets of condensate dripping from the top alter the composition, concentration, and mode of action, potentially creating localized areas of abnormal corrosion on the sample and affecting the accuracy of the test results. However, the continuous high humidity spray inside the chamber makes it impossible to avoid large, vertically falling droplets. To address this issue, a salt spray test chamber, as disclosed in publication number CN221899035U, is described. This chamber mounts the sample onto a rack within the test chamber body and secures it, while simultaneously... The control cabinet adjusts the temperature and humidity parameters of the test chamber to meet the test standard requirements. When the mist and water droplets on the top cover of the equipment need to be cleaned, the servo motor drives the screw to rotate, and the two screws rotate synchronously through the connecting box. The screw drives the sleeve to move, and the sleeve drives the first and second mounting plates to move accordingly. The first and second mounting plates drive the cleaning cotton to wipe and clean the inner wall of the top cover of the equipment, so that the droplets on the inner wall of the transparent cover can be scraped off before they form large droplets. However, due to the lack of a collection function, some droplets fall directly during scraping and then fall onto the sample. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a testing device and method for detecting the corrosion resistance of carbon-coated aluminum foil, thus solving the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corrosion resistance testing device for carbon-coated aluminum foil, comprising a base, on which a test chamber, a controller, and a support are mounted. The test chamber contains a spray head and a clamp for holding the carbon-coated aluminum foil. The support is hinged to two side mounting brackets. The test chamber is also hinged to a hydraulic cylinder that is hinged to both side mounting brackets. Both side mounting brackets are connected to a transparent cover that covers the test chamber. The transparent cover is provided with a cleaning mechanism. The cleaning mechanism includes a scraping and collecting component, a moving component, and a discharging component. The top of the test chamber has grooves on both sides, and the two ends of the transparent cover are covered on the grooves on both sides. The opposite sides of the grooves on both sides have through slots that communicate with the inside of the test chamber. The scraping and collecting component is used to scrape and collect droplets on the inner wall of the transparent cover. The moving component is used to move the scraping and collecting component along the transparent cover. The discharging component is used to discharge the liquid collected by the scraping and collecting component into the grooves.

[0006] Preferably, the scraping assembly includes two stop bars and a scraper attached to the inner wall of the transparent cover. The upper parts of the opposite sides of the two stop bars are provided with inclined sections. Connecting rods connected to the inclined sections on both sides are evenly distributed on the scraper. The front and rear sides of the two stop bars are also attached to the inner wall of the transparent cover. The bottom of the two stop bars is attached to the top of the test chamber. A return spring is evenly distributed at the bottom of the scraper. A sliding rod connected to the return spring and slidably connected to the scraper is attached to the return spring, and the sliding rod is connected to the baffle. A sealing frame that contacts both the stop bars and the transparent cover is provided on the outer side of the baffle. A V-shaped protrusion is provided on both sides of the top of the baffle.

[0007] Preferably, the moving component includes a cylinder seat disposed on the transparent cover, a hydraulic cylinder is disposed on the cylinder seat, and the piston rod of the hydraulic cylinder is connected to the front end of the right side of the scraper through the transparent cover. A guide rod is disposed at the rear end of the right side of the scraper, penetrating the transparent cover. Both the piston rod and the guide rod are higher than the stop rod.

[0008] Preferably, the discharge assembly includes a vertical frame mounted on a fixed frame. Both ends of the vertical frame are rotatably connected to a lead screw via bearings. A connecting plate that is slidably connected to the vertical frame is screwed onto the lead screw. Push rods with an inverted V-shaped bottom are provided on both sides of the bottom of the connecting plate, and the push rods penetrate the transparent cover vertically. The push rods are also located directly above the protruding rod.

[0009] Preferably, both the fixed frame and the transparent cover are rotatably connected to the lead screw two via bearings. The lead screw two is screwed with a slide that is slidably connected to the fixed frame. The slide slides through the transparent cover, and the front ends of the opposite sides of the slides are provided with rubber strips aligned with the side of the side stops that are far away from each other. The rubber strips are also slidably connected to the rear inner wall of the transparent cover. The front inner wall of the transparent cover is also provided with a clearance groove for the slide and the rubber strip to enter.

[0010] Preferably, a servo geared motor is provided on the vertical frame, and the output shaft of the servo geared motor is connected to a bevel gear and a reduction gear. The bottom of the reduction gear is meshed with a drive gear provided on a lead screw, and the bevel gear is meshed with a bevel gear provided on a lead screw.

[0011] Preferably, scraping components for scraping off droplets at the bottom of the baffle are provided in both grooves.

[0012] Preferably, the scraping assembly includes two scraper rods located within the groove. The scraper rods are located below the baffle and are the same length as the baffle. The opposite sides of the two scraper rods are in contact with each other. Guide rails slide evenly through the two scraper rods. The bottom of each scraper rod is hinged to an inclined rod that is hinged to the groove. Sleeves are provided on both sides of the bottom of the guide rails. The sleeves are slidably connected to a mounting rod provided on the groove. A return spring connected to the sleeve is provided on the mounting rod.

[0013] A method for determining the corrosion resistance of carbon-coated aluminum foil, comprising the following steps: Step 1: Prepare a carbon-coated aluminum foil sample. Place the sample in the test chamber and clamp it with a fixture. Then, cover the test chamber with a transparent cover. After setting the test program through the controller, conduct the test so that the spray head sprays salt spray onto the sample. Step 2: Activate the moving component to drive the scraping and collecting component to move back and forth on the inner wall of the transparent cover, so that the droplets on the inner wall of the transparent cover above the sample are scraped off and collected. Step 3: Each time the scraping component moves directly above the groove, the discharge component works to discharge the liquid collected by the scraping component into the groove; Step 4: After the test time is reached, open the transparent cover and take out the sample. Observe whether the sample has blistering, peeling, white rust and pitting, so as to determine the corrosion resistance of the coating.

[0014] Preferably, in steps one and four, the piston rod of hydraulic cylinder two extends and retracts to drive the fixed frame to rotate around the support base, thereby opening or closing the transparent cover.

[0015] This invention provides a device and method for testing the corrosion resistance of carbon-coated aluminum foil. Compared with the prior art, it has the following advantages: 1. The corrosion resistance testing equipment and method for the carbon-coated aluminum foil coating involves a moving component that drives a scraping and collecting component to reciprocate along the inner wall of a transparent cover. This scrapes and collects droplets on the inner wall of the transparent cover above the sample. Each time the scraping and collecting component moves directly above the groove, the discharge component discharges the collected liquid into the groove. This prevents the droplets on the inner wall of the transparent cover from condensing into large droplets that fall vertically onto the sample, thus avoiding localized abnormal corrosion of the sample and ensuring the accuracy of the test results.

[0016] 2. The corrosion resistance testing equipment and method for the carbon-coated aluminum foil coating involves a servo-driven geared motor in the discharge assembly that drives bevel gear one and reduction gear to rotate, causing both drive gear and bevel gear two to rotate. This, in turn, drives lead screw one and lead screw two to rotate, causing the push rod on the connecting plate to move downwards and the slide to move forward. This allows the rubber strip to scrape off the liquid droplets attached to the side of the baffles that are far apart from each other. The downward movement of the push rod pushes the convex rod downwards, which in turn causes the baffle to move downwards and enter the groove. This allows the liquid collected above the baffle to flow into the groove and then flow through the channel into the test chamber.

[0017] 3. The corrosion resistance testing equipment and method for the carbon-coated aluminum foil coating: When the baffle moves down into the groove and contacts the scrapers on both sides, the baffle continues to move down, so that both the scrapers and the guide rail are under pressure, which in turn causes the guide rail to move down. Furthermore, the scraper can be pushed to move on the guide rail by the inclined rod, scraping away the droplets attached to the bottom of the baffle, thereby further preventing the droplets from falling onto the sample. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 For the present invention Figure 1 Another perspective illustration; Figure 3 This is a schematic diagram of the transparent cover of the present invention when it is opened; Figure 4 This is a schematic diagram of the scraping and collecting component and the discharge component of the present invention; Figure 5 This is a schematic diagram of the moving component of the present invention; Figure 6 This is a cross-sectional schematic diagram of the scraping and collecting component of the present invention; Figure 7 This is a cross-sectional schematic diagram of the scraping and collecting component of the present invention from another perspective; Figure 8 This is a schematic diagram of the carriage and rubber strip of the present invention; Figure 9 For the present invention Figure 5 A schematic diagram at point B in the middle; Figure 10 For the present invention Figure 3A schematic diagram at point C in the middle; Figure 11 For the present invention Figure 3 A schematic diagram at point D in the middle; Figure 12 This is a schematic diagram of the push rod and the protruding rod of the present invention; Figure 13 This is a schematic diagram of the scraping component of the present invention; Figure 14 For the present invention Figure 13 A schematic diagram at point A in the middle; Figure 15 This is a three-dimensional schematic diagram of the scraping component of the present invention.

[0019] In the diagram: 1. Base; 2. Test chamber; 3. Controller; 4. Spray head; 5. Clamp; 6. Support base; 7. Fixture; 8. Transparent cover; 10. Hydraulic cylinder 2; 9. Cleaning mechanism; 93. Groove; 94. Through groove; 91. Scraping assembly; 911. Scraper; 912. Stop bar; 913. Beveled section; 914. Connecting rod; 915. Return spring one; 916. Slide bar; 917. Baffle; 918. Sealing frame; 919. Protruding rod; 92. Moving component; 921. Cylinder base; 922. Hydraulic cylinder one; 923. Guide rod; 95. Discharge assembly; 951. Vertical frame; 952. Lead screw one; 953. Connecting plate; 954. Push rod; 955. Lead screw two; 956. Slide; 957. Rubber strip; 958. Servo geared motor; 959. Bevel gear one; 9510. Reduction gear; 9511. Drive gear; 9512. Bevel gear two; 9513. Clearance groove; 96. Scraping assembly; 961. Scraper bar; 962. Diagonal bar; 963. Guide rail; 964. Sleeve; 965. Mounting rod; 966. Return spring II. Detailed Implementation

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

[0021] See Figures 1-15 The present invention provides the following two technical solutions: First embodiment: A corrosion resistance testing device for carbon-coated aluminum foil includes a base 1, on which a test chamber 2, a controller 3, and a support 6 are provided. The test chamber 2 is provided with a spray head 4 and a clamp 5 for holding the carbon-coated aluminum foil. The support 6 is hinged to both sides of the fixing frame 7. The test chamber 2 is also hinged to a hydraulic cylinder 10 that is hinged to both sides of the fixing frame 7. Both sides of the fixing frame 7 are connected to a transparent cover 8 that is closed on the test chamber 2. By extending and retracting the hydraulic cylinder 10, the fixing frame 7 can be rotated around the support 6 through the hinge, so that the transparent cover 8 can be opened and closed by rotation. The transparent cover 8 is provided with a cleaning mechanism 9. The cleaning mechanism 9 includes a scraping assembly 91, a moving assembly 92, and a discharge assembly 95. The top two sides of the test chamber 2 are provided with grooves 93, and the two ends of the transparent cover 8 are covered on the two side grooves 93. The opposite sides of the two side grooves 93 are provided with through grooves 94 that communicate with the inside of the test chamber 2, so that the liquid can flow back into the test chamber 2 through the through grooves 94.

[0022] The scraping and collecting component 91 is used to scrape and collect droplets on the inner wall of the transparent cover 8, the moving component 92 is used to move the scraping and collecting component 91 along the transparent cover 8, and the discharging component 95 is used to discharge the liquid collected by the scraping and collecting component 91 into the groove 93.

[0023] The moving component 92 is activated, causing the scraping and collecting component 91 to move back and forth on the inner wall of the transparent cover 8. This scrapes and collects the droplets on the inner wall of the transparent cover 8 above the sample. Each time the scraping and collecting component 91 moves directly above the groove 93, the discharging component 95 is activated to discharge the liquid collected by the scraping and collecting component 91 into the groove 93. This prevents the droplets on the inner wall of the transparent cover 8 from condensing into large droplets that fall vertically onto the sample, thus avoiding localized abnormal corrosion of the sample and affecting the accuracy of the test results.

[0024] The scraping assembly 91 includes two baffles 912 and a scraper 911 attached to the inner wall of the transparent cover 8. The upper part of the opposite side of the two baffles 912 is provided with a beveled part 913. The beveled part 913 is used to prevent the top of the baffles 912 from having a flat surface, which would cause liquid to accumulate, thereby preventing liquid droplets from falling onto the sample when moving laterally. In order to enable the scraper 911 to move synchronously with the side stops 912, the scraper 911 is evenly provided with connecting rods 914 that connect to the inclined surfaces 913 on both sides; The entire space covered by the transparent cover 8 is a salt spray environment, so droplets will also adhere to the baffle 912. Therefore, each time the liquid inside the transparent cover 8 is scraped off and collected, the side of the baffle 912 that is far apart from each other and the bottom are also cleaned. This way, each time it moves over the sample, it will not have time to condense into large droplets and fall onto the sample. Therefore, in order for the baffle 912 to ensure that it can collect the liquid scraped off by the scraper 911, the front and back sides of the two baffles 912 are also in contact with the inner wall of the transparent cover 8. In order to prevent the baffles 912 from dripping when they move over the sample, the bottom of the two baffles 912 is in contact with the top of the test chamber 2. In this way, when the baffles 912 enter and exit the groove 93, the attached droplets can be scraped off by the top of the test chamber 2, thereby preventing the droplets from accumulating and growing larger, and thus dripping onto the sample when they move over the sample. In order to drain the collected liquid, a return spring 915 is evenly arranged at the bottom of the scraper 911. The return spring 915 is connected to a slide rod 916 that is slidably connected to the scraper 911, and the slide rod 916 is connected to the baffle 917. In order to improve the sealing, a sealing frame 918 is provided on the outside of the baffle 917, which is in contact with the baffle rod 912 and the transparent cover 8. In order to facilitate the subsequent pushing of the baffle 917, a protruding rod 919 with an inverted V-shaped top is provided on both sides of the top of the baffle 917.

[0025] The liquid scraped by the scraper 911 flows along both sides of the scraper 911 into the space between the two side baffles 912 and is located above the baffle 917. When the baffle 917 moves down into the groove 93, it can leave the space between the two side baffles 912, thereby allowing the liquid to be discharged into the groove 93. When the baffle 917 is not pushed, the return spring 915 drives the slide bar 916 to move up, thereby driving the baffle 917 to move up into the space between the two side baffles 912.

[0026] The moving assembly 92 includes a cylinder seat 921 mounted on the transparent cover 8. A hydraulic cylinder 922 is mounted on the cylinder seat 921, and the piston rod of the hydraulic cylinder 922 passes through the transparent cover 8 and is connected to the front end of the right side of the scraper 911. A guide rod 923 is mounted on the rear end of the right side of the scraper 911, passing through the transparent cover 8. Both the piston rod and the guide rod 923 are higher than the stop rod 912. The hydraulic cylinder 922 drives the scraper 911 to move, which can move along the transparent cover 8. The guide rod 923 guides the scraper 911. The guide rod is positioned on both sides so that the liquid dripping from the piston rod and the guide rod 923 will not drip onto the sample during movement. Also, being higher than the stop rod 912, it will not affect the subsequent cleaning of the liquid on the side of the stop rod 912.

[0027] The discharge assembly 95 includes a vertical frame 951 mounted on a fixed frame 7. Both ends of the vertical frame 951 are rotatably connected to a lead screw 952 via bearings. A connecting plate 953 is screwed onto the lead screw 952 and slidably connected to the vertical frame 951. Both sides of the bottom of the connecting plate 953 are provided with push rods 954 with an inverted V-shape at the bottom. The push rods 954 vertically penetrate the transparent cover 8 and are located directly above the protrusion 919. The inverted V-shape allows them to fit perfectly against the inverted V-shape at the top of the transparent cover 8 when retracted to the top, and they can also cooperate with the protrusion 919 when pushed down.

[0028] Rotating the lead screw 952 causes the connecting plate 953 to rise and fall along the vertical frame 951, which in turn drives the push rod 954 to rise and fall. When it is necessary to move the scraper 911, the push rod 954 can be moved upward without obstruction. When it is necessary to push the baffle 917 downward, the push rod 954 can be moved downward.

[0029] In order to remove the droplets attached to the side of the two baffles 912 that are far apart from each other, the fixed frame 7 and the transparent cover 8 are rotatably connected to the screw 955 through bearings. The screw 955 is screwed with a slide 956 that is slidably connected to the fixed frame 7. The slide 956 slides through the transparent cover 8, and the front ends of the opposite sides of the slide 956 are provided with rubber strips 957 that are aligned with the side of the two baffles 912 that are far apart from each other. The rubber strips 957 are also slidably connected to the rear inner wall of the transparent cover 8. The front inner wall of the transparent cover 8 is also provided with a clearance groove 9513 for the slide 956 and the rubber strips 957 to enter.

[0030] The rubber strip 957 allows the scraper 911 to move the baffle 912 to a position with slight deviation, so that the droplets on both sides of the baffle 912 can still be cleaned. By rotating the screw 955, the slide 956 is guided to slide through the fixed frame 7, which in turn drives the rubber strip 957 to move along the baffle 912 until it enters the clearance groove 9513, thus ensuring that the droplets attached to both sides of the baffle 912 are cleaned.

[0031] In order to simultaneously discharge the liquid above the baffle 917 and the side of the baffle 912, a servo geared motor 958 is installed on the vertical frame 951. The output shaft of the servo geared motor 958 is connected to a bevel gear 959 and a reduction gear 9510. The bottom of the reduction gear 9510 is meshed with a drive gear 9511 installed on the lead screw 955. The bevel gear 959 is meshed with a bevel gear 9512 installed on the lead screw 952. The drive gear 9511 and the reduction gear 9510 are set according to the moving distance of the slide 956 and the push rod 954. The thread pitch on the lead screw 952 and the lead screw 955 is the same.

[0032] The servo geared motor 958 drives the bevel gear 959 and the reduction gear 9510 to rotate, which in turn drives the drive gear 9511 and the bevel gear 9512 to rotate, thereby driving the lead screw 952 and the lead screw 955 to rotate synchronously.

[0033] Liquid may also adhere to the bottom of the baffle 917. In order to remove the liquid from the bottom, a second implementation method is provided. The main difference between the second and first implementation methods is that scraping components 96 for scraping off the liquid droplets at the bottom of the baffle 917 are provided in the grooves 93 on both sides.

[0034] The scraping assembly 96 includes two scraper rods 961 located within a groove 93. The scraper rods 961 are located below a baffle 917 and are the same length as the baffle 917. The opposite sides of the two scraper rods 961 are in contact with each other. A guide rail 963 slides evenly through the two scraper rods 961. The bottom of each scraper rod 961 is hinged to an inclined rod 962 that is hinged to the groove 93. Sleeves 964 are provided on both sides of the bottom of the guide rail 963. The sleeves 964 are slidably connected to a mounting rod 965 provided on the groove 93. A return spring 966 connected to the sleeve 964 is provided on the mounting rod 965.

[0035] After the push rod 954 contacts the protruding rod 919, it begins to push the baffle 917 into the groove 93. After contacting the scraper rod 961, it continues to push the baffle 917 downward. At this time, both the scraper rod 961 and the guide rail 963 are under pressure. The guide rail 963 is a low-friction guide rail, which makes it easy for the scraper rod 961 to slide on it. Then, through the sleeve 964, it slides on the mounting rod 965 to compress the return spring 966, causing both the scraper rod 961 and the guide rail 963 to move downward. Furthermore, the inclined rod 962 can push the scraper rod 961 to move on the guide rail 963, scraping away the droplets attached to the bottom of the baffle 917, thereby further preventing the droplets from falling onto the sample.

[0036] Controller 3 is electrically connected to hydraulic cylinder 922, hydraulic cylinder 10, and servo geared motor 958. Controller 3 uses a Siemens S7-1500 and is powered by an external power supply via cable. Controller 3 can preset a target position and collect real-time feedback from the displacement sensors built into the hydraulic cylinders. After comparing the position deviation, controller 3 outputs a control signal to drive the proportional directional valve on the hydraulic cylinder to change the valve opening and oil supply direction. The oil pump continuously outputs pressurized oil to supply oil to the hydraulic cylinder, automatically adjusting the oil supply flow rate according to the deviation, controlling the hydraulic cylinder's speed of extension or retraction. When the actual position approaches the set point, the valve opening is gradually reduced to achieve deceleration. After the position deviation falls within the allowable error range, the proportional directional valve returns to the neutral position to cut off the oil circuit. This, combined with the hydraulically controlled check valve, locks the hydraulic cylinder, enabling the piston rod to precisely stop at any specified position.

[0037] The controller 3 also has a servo driver that is electrically connected to the controller 3. The servo driver is also electrically connected to the servo geared motor 958 and the encoder inside the servo geared motor 958. In this way, the controller 3 presets the target rotation angle or number of revolutions, receives the actual rotation angle data fed back by the encoder of the servo geared motor 958 in real time, compares the position deviation, and outputs a control signal to the servo driver. The servo driver adjusts the motor speed according to the size of the deviation. When the deviation is large, the motor runs at high speed and automatically decelerates and buffers when it approaches the target angle. After the error between the actual rotation angle and the set value reaches the standard, the drive output is cut off, so that the servo geared motor 958 is precisely locked at the set rotation position.

[0038] A method for determining the corrosion resistance of a carbon-coated aluminum foil coating using a testing device according to a second embodiment, comprising the following steps: Step 1: Prepare a carbon-coated aluminum foil sample with a carbon coating. Place the sample in the test chamber 2 and clamp it with the clamp 5. Then cover the test chamber 2 with the transparent cover 8. After setting the test program through the controller 3, carry out the test so that the spray head 4 sprays salt spray onto the sample. In this method, the aluminum substrate is wrapped around the sample with edging material. Butyl waterproof and anti-corrosion tape is used to wrap the sample around the sample so that only the coating is in contact with the salt spray environment, in order to test the coating's ability to protect the aluminum substrate from corrosion. Step 2: Activate the moving component 92 to drive the scraping and collecting component 91 to move back and forth on the inner wall of the transparent cover 8, so that the droplets on the inner wall of the transparent cover 8 above the sample are scraped off and collected. The controller 3 controls the hydraulic cylinder 922 to work, so that the scraper 911 slides back and forth along the inner wall of the transparent cover 8. The movement of the scraper 911 causes the connecting rod 914 to drive the two side stops 912 to move as well. In this way, the liquid scraped off by the scraper 911 falls directly between the two side stops 912 and is located above the baffle 917. The scraper 911 stops when it is located above the groove 93 on one side.

[0039] Step 3: Each time the scraping component 91 moves directly above the groove 93, the discharge component 95 operates to discharge the liquid collected by the scraping component 91 into the groove 93. The controller 3 controls the servo reduction motor 958 to operate, causing the lead screw 1 952 and lead screw 2 955 to rotate synchronously. This causes the push rod 954 to move downwards and contact the convex rod 919, continuing to move downwards to push the baffle 917 into the groove 93, stretching the return spring 1 915 and simultaneously compressing the return spring 2 966. This allows the liquid collected above the baffle 917 to fall into the groove 93 and then drain back into the test chamber 2 through the through groove 94. The scraper 961 can move laterally along the guide rail 963 to clean the liquid adhering to the bottom of the baffle 917. Simultaneously, as the push rod 954 moves downwards, the slide 95... 6. Moving the rubber strip 957 along the side of the baffle 912 allows the liquid on the side of the baffle 912 to fall into the groove 93. After cleaning, the slide 956 and push rod 954 are reset, allowing the scraper 911 to move in the opposite direction. When the liquid at the bottom of the baffle 912 enters and exits the groove 93, it is scraped off by the top of the test chamber 2. This repeated operation ensures that large droplets do not have time to accumulate on the inner wall of the transparent cover 8 and fall vertically, as well as large droplets do not have time to accumulate on the side of the baffle 912 and the bottom of the baffle 917 and fall vertically. This improves the uniformity of the sample in the salt spray environment and thus improves the accuracy of the results.

[0040] Step 4: After the test time is reached, open the transparent cover 8 and take out the sample. Observe whether the sample has blistering, peeling, white rust and pitting, so as to determine the corrosion resistance of the coating.

[0041] In both steps one and four, the piston rod of hydraulic cylinder 210 extends and retracts, causing the fixed frame 7 to rotate around the support base 6, thereby opening or closing the transparent cover 8.

[0042] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the corrosion resistance of carbon-coated aluminum foil, comprising a base (1), wherein a test chamber (2), a controller (3), and a support base (6) are provided on the base (1), and a spray head (4) and a clamp (5) for holding the carbon-coated aluminum foil are provided inside the test chamber (2), characterized in that: The support base (6) is hinged to both sides of the fixing frame (7). The test chamber (2) is also hinged to a hydraulic cylinder (10) which is hinged to both sides of the fixing frame (7). Both sides of the fixing frame (7) are connected to a transparent cover (8) that is closed on the test chamber (2). A cleaning mechanism (9) is provided on the transparent cover (8). The cleaning mechanism (9) includes a scraping assembly (91), a moving assembly (92), and a discharge assembly (95). The test chamber (2) has grooves (93) on both sides of its top, and the transparent cover (8) covers both ends of the grooves (93) on both sides. The opposite sides of the grooves (93) on both sides have through slots (94) that communicate with the inside of the test chamber (2). The scraping assembly (91) is used to scrape and collect droplets on the inner wall of the transparent cover (8). The moving assembly (92) is used to move the scraping assembly (91) along the transparent cover (8). The discharge assembly (95) is used to discharge the liquid collected by the scraping assembly (91) into the grooves (93).

2. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 1, characterized in that: The scraping assembly (91) includes two baffles (912) and a scraper (911) attached to the inner wall of the transparent cover (8). The upper part of the opposite sides of the two baffles (912) is provided with inclined surfaces (913). The scraper (911) is evenly provided with connecting rods (914) that connect to the inclined surfaces (913) on both sides. The front and rear sides of the two baffles (912) are also attached to the inner wall of the transparent cover (8). The bottom of the two baffles (912) is attached to the top of the test chamber (2). The bottom of the scraper (911) is uniformly provided with a return spring (915), and the return spring (915) is connected to a slide rod (916) that is slidably connected to the scraper (911). The slide rod (916) is connected to the baffle (917). The outer side of the baffle (917) is provided with a sealing frame (918) that is in contact with the baffle rod (912) and the transparent cover (8). The top two sides of the baffle (917) are provided with protruding rods (919) with an inverted V-shaped top.

3. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 2, characterized in that: The moving component (92) includes a cylinder seat (921) disposed on a transparent cover (8), a hydraulic cylinder (922) is disposed on the cylinder seat (921), and the piston rod of the hydraulic cylinder (922) passes through the transparent cover (8) and is connected to the front end of the right side of the scraper (911). A guide rod (923) is disposed at the rear end of the right side of the scraper (911) and passes through the transparent cover (8). Both the piston rod and the guide rod (923) are higher than the stop rod (912).

4. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 2, characterized in that: The discharge assembly (95) includes a vertical frame (951) mounted on a fixed frame (7). Both ends of the vertical frame (951) are rotatably connected to a lead screw (952) via bearings. A connecting plate (953) is screwed onto the lead screw (952) and slidably connected to the vertical frame (951). Both sides of the bottom of the connecting plate (953) are provided with push rods (954) with an inverted V-shaped bottom. The push rods (954) penetrate vertically through the transparent cover (8). The push rods (954) are also located directly above the protruding rod (919).

5. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 4, characterized in that: The fixed frame (7) and the transparent cover (8) are rotatably connected to the lead screw (955) via bearings. The lead screw (955) is screwed with a slide (956) that is slidably connected to the fixed frame (7). The slide (956) slides through the transparent cover (8). The front ends of the slides (956) on both sides are provided with rubber strips (957) that are aligned with the side away from the two side stops (912). The rubber strips (957) are also slidably connected to the rear inner wall of the transparent cover (8). The front inner wall of the transparent cover (8) is also provided with a clearance groove (9513) for the slide (956) and the rubber strip (957) to enter.

6. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 5, characterized in that: A servo geared motor (958) is provided on the vertical frame (951). The output shaft of the servo geared motor (958) is connected to a bevel gear (959) and a reduction gear (9510). The bottom of the reduction gear (9510) is meshed with a drive gear (9511) provided on a lead screw (955). The bevel gear (959) is meshed with a bevel gear (9512) provided on a lead screw (952).

7. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 2, characterized in that: Both sides of the groove (93) are provided with scraping components (96) for scraping off the droplets at the bottom of the baffle (917).

8. The corrosion resistance testing equipment for carbon-coated aluminum foil according to claim 7, characterized in that: The scraping assembly (96) includes two scraper rods (961) located in the groove (93). The scraper rods (961) are located below the baffle (917) and are the same length as the baffle (917). The opposite sides of the two scraper rods (961) are in contact with each other. A guide rail (963) slides evenly through the two scraper rods (961). The bottom of each of the two scraper rods (961) is hinged with an inclined rod (962) that is hinged to the groove (93). Sleeves (964) are provided on both sides of the bottom of the guide rail (963). The sleeves (964) are slidably connected to the mounting rod (965) provided on the groove (93). A second return spring (966) connected to the sleeve (964) is provided on the mounting rod (965).

9. A method for determining the corrosion resistance of a carbon-coated aluminum foil coating using a testing device, characterized in that: Using the corrosion resistance testing equipment for carbon-coated aluminum foil as described in any one of claims 1-8, the method includes the following steps: Step 1: Prepare a carbon-coated aluminum foil sample with a carbon coating. Place the sample in the test chamber (2), clamp it with the clamp (5), and then cover the test chamber (2) with the transparent cover (8). After setting the test program through the controller (3), carry out the test so that the spray head (4) sprays salt spray onto the sample. Step 2: Make the moving component (92) work, drive the scraping and collecting component (91) to move back and forth on the inner wall of the transparent cover (8), so that the droplets on the inner wall of the transparent cover (8) above the sample are scraped off and collected. Step 3: Each time the scraping assembly (91) moves directly above the groove (93), the liquid collected by the scraping assembly (91) is discharged into the groove (93) by the operation of the discharge assembly (95); Step 4: After the test time is reached, open the transparent cover (8) and take out the sample. Observe whether the sample has blistering, peeling, white rust and pitting, so as to realize the determination of the corrosion resistance of the coating.

10. The method for determining the corrosion resistance of carbon-coated aluminum foil according to claim 9, characterized in that: In both steps one and four, the piston rod of hydraulic cylinder two (10) extends and retracts to drive the fixed frame (7) to rotate around the support base (6), thereby driving the transparent cover (8) to open or close.

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