Method for monitoring corrosion capability of circulating salt spray test chamber

Abstract

The invention discloses a method for monitoring the corrosion capacity of a circulating salt spray test chamber, and relates to the technical field of aluminum alloys. The method comprises the following steps of test preparation, device configuration and environment debugging, test process management, monitoring and recording, corrosion degree evaluation and report arrangement and summarization. The test box comprises a box body, a positioning mechanism is mounted in the box body, a spraying mechanism is mounted at the top end of the inner wall of the box body, the positioning mechanism is located below the spraying mechanism, a lifting mechanism is mounted on the peripheral wall of the box body, and a collecting mechanism is mounted at the bottom end of the inner wall of the box body; by arranging the positioning mechanism, aluminum alloy materials of different specifications can be positioned, meanwhile, aluminum alloy can be turned over and rotated, then the aluminum alloy can be sprayed more uniformly and comprehensively through the spraying mechanism, so that it is ensured that salt mist uniformly and comprehensively covers the surface of a sample, and the quality of the sample is improved. And the accuracy of test data can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloys, in particular to a method for monitoring the corrosion capacity of a circulating salt spray test chamber. Background Art

[0002] With the continuous development and maturity of the aluminum industry, the reliability of aluminum alloy materials in corrosion resistance has become particularly important, especially for aluminum heat exchangers. Corrosion testing and subsequent evaluation of the results are a very important testing method for their development. Nowadays, there are many corrosion laboratories that can test the corrosion performance of various types of aluminum alloy products and evaluate the corrosion results. However, the corrosion capacity of the corrosion box is often affected by abnormal changes in parameter settings, accessories, and the surrounding environment, etc., and the results may be different in different laboratories. Even different test chambers in the same laboratory may lead to different results, which has a great impact on the evaluation and research of the corrosion performance of the product.

[0003] In the testing of aluminum alloys, however, in the existing salt spray spray testing of aluminum alloys, the aluminum alloy cannot be uniformly salt sprayed in all directions, resulting in only certain parts of the sample being corroded, and the overall performance cannot be truly reflected, thereby affecting the judgment of the reliability of the material. In response to the above problems, the inventors proposed a method for monitoring the corrosion capacity of a cyclic salt spray test chamber to solve the above problems. Summary of the invention

[0004] In order to solve the problem that it is inconvenient to fully spray aluminum alloy, the purpose of the present invention is to provide a method for monitoring the corrosion capacity of a circulating salt spray test chamber.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a method for monitoring the corrosion capacity of a circulating salt spray test chamber, comprising the following steps:

[0006] S1. Test preparation: Select and prepare materials: determine the type of material to be tested (such as metal, alloy, coating, etc.), cut and process the material samples to a uniform size (such as 50mm x 50mm), and ensure the consistency of surface treatment;

[0007] S2. Device configuration and environmental debugging: Install the salt spray test chamber, ensure that all components (spray system, heater, sensor, etc.) work properly, prepare the salt spray solution (usually 5% NaCl) and inject it into the salt spray test chamber. Set the temperature to 40°C and keep the humidity at ≥95%;

[0008] S3. Test process management: set the cycle time of salt spray in the test chamber (for example, 12 hours of salt spray, 12 hours of drying), ensure that the cycle program can be repeated, start the test, and monitor the salt spray concentration and environmental conditions in real time;

[0009] S4. Monitoring and recording: Use temperature and humidity sensors and salt spray concentration monitors to collect data in real time, record environmental changes, measure the corrosion rate of samples at regular intervals (e.g., every day) (electrochemical workstations can be used) and record the surface conditions of samples;

[0010] S5. Evaluate the degree of corrosion: At the end of the test or at a set time point, remove the sample and perform surface treatment (such as cleaning) to remove salt stains. Evaluate the severity of corrosion by weight loss method or electrochemical measurement method, record the data and draw a corrosion rate curve;

[0011] S6. Report compilation and summary: All data are compiled to form a test report, including test conditions, observation results, data analysis and conclusions, and suggestions for material improvement or application prospects based on the experimental results, as well as possible further research directions.

[0012] Preferably, the test box comprises a box body, a positioning mechanism is installed in the box body, a spray mechanism is installed at the top of the inner wall of the box body, the positioning mechanism is located below the spray mechanism, a lifting mechanism is installed on the peripheral wall of the box body, and a collecting mechanism is installed at the bottom of the inner wall of the box body.

[0013] Preferably, the positioning mechanism includes a two-way threaded rod, which is rotatably mounted on the inner wall of the box body, a threaded slider is provided on the outer threaded sleeve of the two-way threaded rod, support plates are fixedly provided on the outer sides of the two threaded sliders, a rotating shaft is rotatably provided in the support plate, and a clamping plate is fixedly provided on the opposite ends of the two rotating shafts. The positioning mechanism includes a No. 1 transmission rod, which is rotatably mounted on the inner wall of the box body, a transmission shaft is rotatably inserted in the two support plates, the transmission shaft is movably inserted on the outer side of the No. 1 transmission rod, the two transmission shafts are movably inserted on the outer side of the No. 1 transmission rod, a No. 1 bevel gear is fixedly provided on the outer sides of the two transmission shafts, and a No. 2 bevel gear is rotatably provided on the opposite sides of the two support plates. Transmission rod, a No. 2 bevel gear is fixedly provided at the bottom end of the No. 2 transmission rod, the No. 1 bevel gear and the No. 2 bevel gear are meshed with each other, a circular gear is fixedly provided at the top of the No. 2 transmission rod, a crown gear is fixedly provided on the outer side of the rotating shaft, the circular gear and the crown gear on the same side are meshed with each other, a No. 1 motor and a No. 2 motor are installed on the outer side of the box body, the output end of the No. 1 motor is inserted through the box body and fixedly connected to the two-way threaded rod, the output end of the No. 2 motor is inserted through the box body and fixedly connected to the No. 1 transmission rod, soft pads are fixedly provided on the opposite sides of the two clamping plates, symmetrically distributed square grooves are opened on the outer side of the No. 1 transmission rod, and the two transmission shafts are movably inserted in the square grooves.

[0014] Preferably, the spray mechanism includes a movable frame, which is slidably installed on the top of the inner wall of the box body, and a plurality of spray nozzles are installed in the movable frame. Connecting hoses are connected to the outsides of the plurality of spray nozzles, and the ends of the connecting hoses away from the spray nozzles are inserted in the box body, and a No. 1 rotating rod is rotatably inserted at the top of the box body, a rotating plate is fixedly provided on the outside of the No. 1 rotating rod, and a fixed rod is fixedly provided on the outside of the rotating plate. A limiting groove is provided in the movable frame, and the fixed rod is movably inserted in the limiting groove, and a No. 3 motor is installed on the top of the outer side of the box body, and the output end of the No. 3 motor is inserted through the box body and fixedly connected to the No. 1 rotating rod, and symmetrically distributed auxiliary rods are fixedly provided on the inner wall of the box body, and sliding blocks are movably sleeved on the outsides of the two auxiliary rods, and the two sliding blocks are both fixedly connected to the movable frame.

[0015] Preferably, a fixing frame is fixedly provided on the inner wall of the box body, symmetrically distributed limit rods are fixedly provided on the inner wall of the fixing frame, a placement plate is provided on the movable sleeves outside the two limit rods, an electric cylinder is fixedly provided on the inner wall of the fixing frame, the output end of the electric cylinder is fixedly connected to the placement plate, a slope is fixedly provided on the bottom end of the inner wall of the box body, a water outlet pipe is installed on the outside of the box body, a valve is installed on the outside of the water outlet pipe, a mounting frame is fixedly provided on one end of the box body close to the water outlet pipe, and a collection box is installed on the top of the mounting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, by setting a positioning mechanism, aluminum alloy materials of different specifications can be positioned, and the aluminum alloy can be turned over and rotated at the same time. Then, the aluminum alloy can be sprayed more evenly and comprehensively through the spray mechanism to ensure that the salt spray evenly and comprehensively covers the sample surface, thereby improving the accuracy of the test data;

[0018] 2. In the present invention, by arranging the No. 1 transmission rod, the rotating shaft, the bidirectional threaded rod, the rotating shaft and the clamping plate and other structures to cooperate with each other, the aluminum alloy material can be clamped and positioned, and then the aluminum alloy material can be made to rotate, thereby simulating the actual corrosion environment to the greatest extent and improving the reliability and consistency of the experimental results;

[0019] 3. In the present invention, by arranging the movable frame, the No. 1 rotating rod, the rotating plate, the fixed rod and the nozzle and other structures to cooperate with each other, the nozzle can be moved back and forth, so that the aluminum alloy can be sprayed with salt mist more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a side schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the box body and its connection structure of the present invention;

[0024] Figure 4 It is a cross-sectional schematic diagram of the box body and its connection structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0027] Figure 7 It is a schematic diagram of the structure of the spray mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the lifting mechanism structure of the present invention.

[0029] In the figure: 1, box; 2, positioning mechanism; 201, two-way threaded rod; 202, threaded slider; 203, support plate; 204, rotating shaft; 205, clamping plate; 206, cushion; 207, No. 1 motor; 210, No. 1 transmission rod; 211, transmission shaft; 212, square groove; 213, No. 1 bevel gear; 214, No. 2 transmission rod; 215, No. 2 bevel gear; 216, circular gear; 217, crown gear; 218, No. 2 motor; 3, spray mechanism; 3 01. Rotating rod No. 1; 302. Rotating plate; 303. Fixed rod; 304. Moving frame; 305. Limiting groove; 306. Nozzle; 307. Connecting hose; 308. Motor No. 3; 310. Auxiliary rod; 311. Sliding block; 4. Lifting mechanism; 401. Fixed frame; 402. Electric cylinder; 403. Placing plate; 404. Limiting rod; 5. Collecting mechanism; 501. Slope; 502. Water outlet pipe; 503. Valve; 504. Mounting frame; 505. Collecting box. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-8 As shown, the present invention provides a method for monitoring the corrosion capacity of a cyclic salt spray test chamber, comprising the following steps:

[0032] S1. Test preparation: Select and prepare materials: determine the type of material to be tested (such as metal, alloy, coating, etc.), cut and process the material samples to a uniform size (such as 50mm x 50mm), and ensure the consistency of surface treatment;

[0033] S2. Device configuration and environmental debugging: Install the salt spray test chamber, ensure that all components (spray system, heater, sensor, etc.) work properly, prepare the salt spray solution (usually 5% NaCl) and inject it into the salt spray test chamber. Set the temperature to 40°C and keep the humidity at ≥95%;

[0034] S3. Test process management: set the cycle time of salt spray in the test chamber (for example, 12 hours of salt spray, 12 hours of drying), ensure that the cycle program can be repeated, start the test, and monitor the salt spray concentration and environmental conditions in real time;

[0035] S4. Monitoring and recording: Use temperature and humidity sensors and salt spray concentration monitors to collect data in real time, record environmental changes, measure the corrosion rate of samples at regular intervals (e.g., every day) (electrochemical workstations can be used) and record the surface conditions of samples;

[0036] S5. Evaluate the degree of corrosion: At the end of the test or at a set time point, remove the sample and perform surface treatment (such as cleaning) to remove salt stains. Evaluate the severity of corrosion by weight loss method or electrochemical measurement method, record the data and draw a corrosion rate curve;

[0037] S6. Report compilation and summary: All data are compiled to form a test report, including test conditions, observation results, data analysis and conclusions, and suggestions for material improvement or application prospects based on the experimental results, as well as possible further research directions.

[0038] The test box includes a box body 1, a positioning mechanism 2 is installed in the box body 1, a spray mechanism 3 is installed at the top of the inner wall of the box body 1, the positioning mechanism 2 is located below the spray mechanism 3, a lifting mechanism 4 is installed on the peripheral wall of the box body 1, so that the lifting mechanism 4 can lift the material, and a collecting mechanism 5 is installed at the bottom of the inner wall of the box body 1, so that the collecting mechanism 5 can collect the water droplets remaining from the spray.

[0039] The positioning mechanism 2 includes a bidirectional threaded rod 201, which is rotatably mounted on the inner wall of the box body 1. A threaded slider 202 is provided on the outer threaded sleeve of the bidirectional threaded rod 201. Support plates 203 are fixedly provided on the outer sides of the two threaded sliders 202. A rotating shaft 204 is rotatably provided inside the support plate 203. A clamping plate 205 is fixedly provided at the opposite end of the two rotating shafts 204.

[0040] By adopting the above technical solution, the clamping plate 205 can clamp and position the aluminum alloy material.

[0041] The positioning mechanism 2 includes a transmission rod 210 rotatably mounted on the inner wall of the box body 1 , a transmission shaft 211 is rotatably inserted in the two support plates 203 , the transmission shaft 211 is movably inserted on the outside of the transmission rod 210 , and the two transmission shafts 211 are movably inserted on the outside of the transmission rod 210 .

[0042] By adopting the above technical solution, the first transmission rod 210 rotates to drive the transmission shaft 211 to rotate.

[0043] A first bevel gear 213 is fixedly sleeved on the outer side of the two transmission shafts 211, a second transmission rod 214 is rotatably provided on the opposite side of the two support plates 203, a second bevel gear 215 is fixedly provided on the bottom end of the second transmission rod 214, the first bevel gear 213 and the second bevel gear 215 are meshed with each other, a circular gear 216 is fixedly provided on the top of the second transmission rod 214, a crown gear 217 is fixedly provided on the outer side of the rotating shaft 204, and the circular gear 216 and the crown gear 217 on the same side are meshed with each other.

[0044] By adopting the above technical solution, the transmission shaft 211 rotates to drive the crown gear 217 to rotate, and further drive the aluminum alloy material to rotate.

[0045] A No. 1 motor 207 and a No. 2 motor 218 are installed on the outside of the box body 1. The output end of the No. 1 motor 207 is inserted through the box body 1 and fixedly connected to the bidirectional threaded rod 201. The output end of the No. 2 motor 218 is inserted through the box body 1 and fixedly connected to the No. 1 transmission rod 210. Soft pads 206 are fixedly provided on opposite sides of the two clamping plates 205. The outside of the No. 1 transmission rod 210 is provided with symmetrically distributed square grooves 212. The two transmission shafts 211 are movably inserted in the square grooves 212, so that the transmission shaft 211 can slide on the No. 1 transmission rod 210, and the rotation of the No. 1 transmission rod 210 drives the transmission shaft 211 to rotate.

[0046] By adopting the above technical solution, the output end of the No. 1 motor 207 rotates to drive the bidirectional threaded rod 201 to rotate, and the output end of the No. 2 motor 218 rotates to drive the No. 1 transmission rod 210 to rotate.

[0047] The spray mechanism 3 includes a movable frame 304, which is slidably installed on the top of the inner wall of the box body 1. A plurality of nozzles 306 are installed in the movable frame 304. A connecting hose 307 is connected to the outer side of the plurality of nozzles 306. The end of the connecting hose 307 away from the nozzle 306 is inserted into the box body 1.

[0048] By adopting the above technical solution, the connecting hose 307 transmits the external salt spray solution to the nozzle 306, and the nozzle 306 sprays it toward the aluminum alloy material.

[0049] A rotating rod No. 1 301 is rotatably inserted at the top of the box body 1, a rotating plate 302 is fixedly provided on the outer side of the rotating rod No. 1 301, a fixed rod 303 is fixedly provided on the outer side of the rotating plate 302, a limiting slot 305 is provided in the movable frame 304, the fixed rod 303 is movably inserted in the limiting slot 305, a No. 3 motor 308 is installed at the top of the outer side of the box body 1, the output end of the No. 3 motor 308 is inserted through the box body 1 and is fixedly connected to the rotating rod No. 1 301, a symmetrically distributed auxiliary rod 310 is fixedly provided on the inner wall of the box body 1, and sliding blocks 311 are movably sleeved on the outer sides of the two auxiliary rods 310, and the two sliding blocks 311 are both fixedly connected to the movable frame 304.

[0050] By adopting the above technical solution, the output end of the third motor 308 rotates to drive the first moving frame 304 to move back and forth.

[0051] A fixing frame 401 is fixedly provided on the inner wall of the box body 1, and symmetrically distributed limiting rods 404 are fixedly provided on the inner wall of the fixing frame 401. A placement plate 403 is movably sleeved on the outer sides of the two limiting rods 404. An electric cylinder 402 is fixedly provided on the inner wall of the fixing frame 401, and the output end of the electric cylinder 402 is fixedly connected to the placement plate 403.

[0052] By adopting the above technical solution, the output end of the electric cylinder 402 drives the placement plate 403 to move up and down, thereby driving the aluminum alloy material to rise and be transmitted.

[0053] A slope 501 is fixedly provided at the bottom end of the inner wall of the box body 1, a water outlet pipe 502 is installed on the outside of the box body 1, a valve 503 is installed on the outside of the water outlet pipe 502, a mounting frame 504 is fixedly provided at one end of the box body 1 close to the water outlet pipe 502, and a collection box 505 is installed on the top of the mounting frame 504.

[0054] By adopting the above technical solution, the liquid in the box body 1 will be transmitted to the collection box 505 through the slope 501 and the outlet pipe 502 to transfer the waste liquid.

[0055] Working principle: First, connect the connecting hose 307 to the external pump body and the salt spray solution, then place the aluminum alloy material to be tested on the placement plate 403, then start the electric cylinder 402, so that the electric cylinder 402 starts to work, and the output end of the electric cylinder 402 drives the placement plate 403 to move upward under the limit of the limit rod 404, driving the placement plate 403 to drive the aluminum alloy material to move upward, so that the aluminum alloy plate material moves to the inside of the clamping plate 205, then start the No. 1 motor 207, so that the No. 1 motor 207 starts to work, and the output end of the No. 1 motor 207 rotates to drive the bidirectional threaded rod 201 to rotate, and the bidirectional threaded rod 201 rotates. The threaded rod 201 rotates to drive the two threaded sliders 202 to move in opposite directions, and then the support plate 203, the rotating shaft 204 and the clamping plate 205 move in the direction of the aluminum alloy material, and the aluminum alloy material is clamped and positioned by the two clamping plates 205, and then the placement plate 403 is reset, and then the No. 2 motor 218 is started, so that the No. 2 motor 218 starts to work, and the output end of the No. 2 motor 218 rotates to drive the No. 1 transmission rod 210 to rotate, and the No. 1 transmission rod 210 rotates to drive the transmission shaft 211 to rotate, and the transmission shaft 211 rotates to drive the No. 1 bevel gear 213 to rotate, and the No. 1 bevel gear 213 rotates. The rotation of gear 213 drives the mutually meshing No. 2 bevel gear 215 to rotate, the No. 2 bevel gear 215 rotation rod drives the No. 2 transmission rod 214 to rotate, the No. 2 transmission rod 214 rotates and drives the circular gear 216 to rotate, the circular gear 216 rotates and drives the mutually meshing crown gear 217 to rotate, the crown gear 217 rotates and drives the rotating shaft 204 to rotate, the rotating shaft 204 rotates and drives the clamping plate 205 to rotate, and then can drive the aluminum alloy material to rotate, then start the No. 3 motor 308, so that the No. 3 motor 308 starts to work, and the output end of the No. 3 motor 308 rotates and drives the No. 1 rotating rod 301 to rotate The rotation of the rotating plate 302 drives the fixed rod 303 to rotate with the rotating rod 301 as the center, so that the fixed rod 303 passes through the limiting groove 305 to make the movable frame 304 move back and forth horizontally with the assistance of the auxiliary rod 310, thereby driving the nozzle 306 to move back and forth, so that the nozzle 306 sprays salt spray on the aluminum alloy material, so that the aluminum alloy material can be fully corroded in all directions, and then the overall performance can be truly reflected, thereby simulating the actual corrosion environment to the maximum extent, and improving the reliability and consistency of the experimental results.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for monitoring the corrosion capacity of a circulating salt spray test chamber, characterized in that: The following steps are involved: S1. Test preparation: Select and prepare materials: determine the type of material to be tested, cut and process material samples to uniform size, and ensure consistency of surface treatment; S2. Device configuration and environmental debugging: Install the salt spray test chamber, ensure that all components are working properly, prepare the salt spray solution and inject it into the salt spray test chamber, set the temperature to 40°C, and keep the humidity at ≥95%; S3. Test process management: set the cycle time of the salt spray in the test chamber, ensure that the cycle program can be repeated, start the test, and monitor the salt spray concentration and environmental conditions in real time; S4. Monitoring and recording: Through temperature and humidity sensors and salt spray concentration monitors, real-time data is collected, environmental changes are recorded, and the corrosion rate of samples is measured and the surface conditions of samples are recorded at regular intervals; S5. Evaluate the degree of corrosion: At the end of the test or at a set time point, take out the samples and perform surface treatment to remove salt stains. Evaluate the severity of corrosion by weight loss method or electrochemical measurement method, record the data and draw a corrosion rate curve; S6. Report compilation and summary: All data are compiled to form a test report, including test conditions, observation results, data analysis and conclusions, and suggestions for material improvement or application prospects based on the experimental results, as well as possible further research directions.

2. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 1, characterized in that: The test box comprises a box body (1), a positioning mechanism (2) is installed in the box body (1), a spray mechanism (3) is installed at the top of the inner wall of the box body (1), the positioning mechanism (2) is located below the spray mechanism (3), a lifting mechanism (4) is installed on the peripheral wall of the box body (1), and a collecting mechanism (5) is installed at the bottom of the inner wall of the box body (1).

3. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 2, characterized in that: The positioning mechanism (2) comprises a bidirectional threaded rod (201), the bidirectional threaded rod (201) being rotatably mounted on the inner wall of the box body (1), a threaded slider (202) being threadedly sleeved on the outer side of the bidirectional threaded rod (201), a support plate (203) being fixedly disposed on the outer sides of two threaded sliders (202), a rotating shaft (204) being rotatably disposed inside the supporting plate (203), and a clamping plate (205) being fixedly disposed on opposite ends of the two rotating shafts (204).

4. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 3, characterized in that: The positioning mechanism (2) comprises a No. 1 transmission rod (210), the No. 1 transmission rod (210) being rotatably mounted on the inner wall of the box body (1), a transmission shaft (211) being rotatably inserted in the two support plates (203), the transmission shaft (211) being movably inserted outside the No. 1 transmission rod (210), and the two transmission shafts (211) being movably inserted outside the No. 1 transmission rod (210).

5. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 4, characterized in that: A first bevel gear (213) is fixedly sleeved on the outer sides of the two transmission shafts (211); a second transmission rod (214) is rotatably provided on the opposite sides of the two support plates (203); a second bevel gear (215) is fixedly provided at the bottom end of the second transmission rod (214); the first bevel gear (213) and the second bevel gear (215) are meshed with each other; a circular gear (216) is fixedly provided at the top end of the second transmission rod (214); a crown gear (217) is fixedly provided on the outer side of the rotating shaft (204); the circular gear (216) and the crown gear (217) on the same side are meshed with each other.

6. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 5, characterized in that: A No. 1 motor (207) and a No. 2 motor (218) are installed on the outer side of the box body (1); the output end of the No. 1 motor (207) is inserted through the box body (1) and fixedly connected to the bidirectional threaded rod (201); the output end of the No. 2 motor (218) is inserted through the box body (1) and fixedly connected to the No. 1 transmission rod (210); soft pads (206) are fixedly provided on opposite sides of the two clamping plates (205); square grooves (212) that are symmetrically distributed are opened on the outer side of the No. 1 transmission rod (210); and the two transmission shafts (211) are movably inserted in the square grooves (212).

7. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 2, characterized in that: The spray mechanism (3) comprises a movable frame (304), the movable frame (304) being slidably mounted on the top of the inner wall of the box body (1), a plurality of spray heads (306) being mounted inside the movable frame (304), a connecting hose (307) being connected and mounted on the outer sides of the plurality of spray heads (306), and an end of the connecting hose (307) away from the spray head (306) being inserted into the box body (1).

8. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 7, characterized in that: A first rotating rod (301) is rotatably inserted at the top of the box body (1), a rotating plate (302) is fixedly provided on the outer side of the first rotating rod (301), a fixed rod (303) is fixedly provided on the outer side of the rotating plate (302), a limiting groove (305) is provided in the movable frame (304), and the fixed rod (303) is movably inserted in the limiting groove (305), a third motor (308) is installed at the top of the outer side of the box body (1), an output end of the third motor (308) is inserted through the box body (1) and is fixedly connected to the first rotating rod (301), and auxiliary rods (310) distributed symmetrically are fixedly provided on the inner wall of the box body (1), sliding blocks (311) are movably sleeved on the outer sides of the two auxiliary rods (310), and the two sliding blocks (311) are both fixedly connected to the movable frame (304).

9. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 2, characterized in that: A fixing frame (401) is fixedly provided on the inner wall of the box body (1), symmetrically distributed limiting rods (404) are fixedly provided on the inner wall of the fixing frame (401), a placement plate (403) is movably sleeved outside the two limiting rods (404), an electric cylinder (402) is fixedly provided on the inner wall of the fixing frame (401), and an output end of the electric cylinder (402) is fixedly connected to the placement plate (403).

10. A method for monitoring the corrosion capacity of a circulating salt spray test chamber as claimed in claim 2, characterized in that: A slope (501) is fixedly provided at the bottom end of the inner wall of the box body (1), a water outlet pipe (502) is installed on the outside of the box body (1), a valve (503) is installed on the outside of the water outlet pipe (502), and a mounting frame (504) is fixedly provided at one end of the box body (1) close to the water outlet pipe (502), and a collection box (505) is installed at the top of the mounting frame (504).

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