A hydrochloric acid corrosion test chamber for coating corrosion resistance testing

Abstract

This invention belongs to the field of corrosion testing technology, specifically relating to a hydrochloric acid corrosion test chamber for coating corrosion resistance testing. It includes a test chamber and an operating box located on one side of the test chamber. A spray column is installed inside the test chamber, and a drive mechanism is mounted on the test chamber. It also includes a reciprocating mounting mechanism symmetrically mounted on the test chamber. The reciprocating mounting mechanism includes a spline shaft, on which a spline sleeve is slidably fitted. Polygonal frames are fixedly mounted at both ends of the spline sleeve. In this hydrochloric acid corrosion test chamber for coating corrosion resistance testing, when the spline sleeve drives the polygonal frames to rotate, the protrusions on the extension rod slide along the loop guide groove of the guide assembly sleeve, enabling the polygonal frames to achieve a combined rotational and translational motion. Simultaneously, the gears of the material rack engage with the teeth on the arc-shaped plate of the toothed plate, causing the sample to deflect. When the gears separate from the toothed plate, the sample will slightly shake. This multi-dimensional motion design allows all surfaces of the sample to fully and uniformly contact the corrosive medium.

Description

Technical Field

[0001] This invention belongs to the field of corrosion testing technology, specifically relating to a hydrochloric acid corrosion test chamber for coating corrosion resistance testing. Background Technology

[0002] The hydrochloric acid corrosion test chamber is a specialized experimental device designed to evaluate the resistance of materials to corrosion in hydrochloric acid environments. Its core function is to accurately simulate the corrosive effects of hydrochloric acid on various materials. Through controlled experimental conditions, it systematically analyzes the changes in the physical properties and chemical stability of materials in this environment, thereby scientifically predicting the durability and reliability of materials in practical applications. Whether verifying the corrosion resistance life of components under specific working conditions or providing key performance data support for new material development, it helps researchers and companies clearly understand the specific behavioral characteristics of materials in hydrochloric acid corrosion environments, providing important experimental basis for product design optimization, material selection, and quality control.

[0003] Existing test chambers mostly use static sample placement. Once the sample is fixed, it cannot move in multiple dimensions, resulting in uneven contact between the coating sample and the corrosive medium. This can easily lead to insufficient or excessive local corrosion, which seriously affects the accuracy of the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrochloric acid corrosion test chamber for dynamically testing the corrosion resistance of coated workpieces in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A hydrochloric acid corrosion test chamber for coating corrosion resistance testing includes a test chamber and an operation box disposed on one side of the test chamber. A spray column is disposed inside the test chamber, and a drive mechanism is disposed on the test chamber.

[0007] It also includes:

[0008] A reciprocating mounting mechanism is symmetrically mounted on a test chamber. The reciprocating mounting mechanism includes a spline shaft, on which a spline sleeve is slidably sleeved. Polygonal frames are fixedly mounted at both ends of the spline sleeve, and guide components are provided on both sides of the test chamber.

[0009] A material rack, rotatably mounted at the vertex of a polygonal frame, the material rack including gears;

[0010] A toothed plate is fixedly mounted on the test chamber and engages with a gear.

[0011] As a further optimization of the present invention, the spline shaft is rotatably mounted on the test chamber, and extension rods are symmetrically fixedly mounted on the polygonal frame, with protrusions fixedly mounted on the extension rods.

[0012] As a further optimization of the present invention, the guide assembly includes a sleeve, which is fixedly mounted on the test chamber and sleeved on the spline shaft. A spiral guide groove is provided on the sleeve, and the protrusion is slidably disposed in the spiral guide groove.

[0013] As a further optimization of the present invention, the material rack also includes a crossbar, which is rotatably mounted on a polygonal frame. The gear is fixedly mounted at both ends of the crossbar, and a triangular frame is fixedly mounted at both ends of the crossbar. A V-shaped frame is symmetrically fixedly mounted on the triangular frame.

[0014] As a further optimization of the present invention, the toothed plate includes an arc-shaped plate, the arc-shaped plate being arranged with the axis of the spline shaft as the center, and the arc-shaped plate having toothed protrusions, the arc-shaped plate engaging with the gear through the toothed protrusions.

[0015] As a further optimization of the present invention, the driving mechanism includes a servo motor, which is fixedly mounted on the test chamber. The output end of the servo motor is fixedly connected to one of the spline shafts. A synchronous pulley is fixedly mounted on the spline shaft, and a synchronous belt is provided between the synchronous pulleys.

[0016] As a further optimization of the present invention, a storage tank and a pressure tank are fixedly installed inside the operation box, a replenishment pipe is fixedly installed on the pressure tank, and an air valve connected to the pressure tank is installed on the operation box.

[0017] As a further optimization of the present invention, a spray seat is fixedly installed inside the test chamber, the spray seat is connected to the storage tank, the spray column is fixedly installed on the spray seat, a glass nozzle is fixedly installed on the spray column, the upper end of the glass nozzle is connected to the spray seat, and the lower end of the glass nozzle is connected to the pressure tank through a constant pressure valve.

[0018] As a further optimization of the present invention, a collector is fixedly installed inside the test chamber, and a measuring barrel is fixedly installed on the outer wall of the test chamber. The collector passes through the side wall of the test chamber and is connected to the measuring barrel.

[0019] As a further optimization of the present invention, the test chamber is provided with a sealing groove, and a box cover is hinged to the test chamber, with the box cover resting on the sealing groove.

[0020] The beneficial effects of this invention are as follows:

[0021] Unlike existing technologies, in actual use, when the spline sleeve drives the polygonal frame to rotate, the protrusion on the extension rod slides along the loop guide groove of the sleeve in the guide assembly, enabling the polygonal frame to achieve a combined rotational and translational motion. Simultaneously, the gears of the material holder engage with the teeth on the arc-shaped plate of the toothed plate, causing the sample to deflect, and the sample will wobble slightly when the gears separate from the toothed plate. This multi-dimensional motion design allows all surfaces of the sample to fully and uniformly contact the corrosive medium, while more closely mimicking actual working conditions, making the test results more valuable. By simulating dynamic changes in actual working conditions, it is possible to more accurately evaluate the corrosion resistance life and performance stability of the coating under real-world usage environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 3 This is the present invention. Figure 2 Explosion structure diagram;

[0025] Figure 4 This is a schematic diagram of the spray column structure of the present invention;

[0026] Figure 5 This is a partial cross-sectional structural diagram of the operating box of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure of the reciprocating mounting mechanism of the present invention;

[0028] Figure 7 This is the present invention. Figure 6 Enlarged structural diagram at point A in the middle;

[0029] Figure 8 This is the present invention. Figure 6 Explosion structure diagram;

[0030] Figure 9 This is the present invention. Figure 8 Enlarged structural diagram at point B;

[0031] Figure 10 This is a schematic diagram of the guiding component structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the toothed plate structure of the present invention.

[0033] In the diagram: 1. Test chamber; 11. Sealing groove; 12. Chamber cover; 2. Control box; 21. Storage tank; 22. Pressure tank; 221. Liquid replenishment pipe; 23. Air valve; 3. Drive mechanism; 31. Servo motor; 32. Synchronous pulley; 33. Synchronous belt; 4. Reciprocating installation mechanism; 41. Splined shaft; 42. Splined sleeve; 43. Polygonal frame; 431. Extension rod; 432. Protrusion; 44. Guide assembly; 441. Sleeve; 442. U-shaped guide groove; 5. Material rack; 51. Crossbar; 52. Triangular frame; 53. Gear; 54. V-shaped frame; 6. Toothed plate; 61. Arc plate; 62. Toothed protrusion; 7. Spray column; 71. Spray seat; 72. Glass nozzle; 8. Collector; 81. Metering tank. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0035] Example 1, as Figure 1 - Figure 11 As shown, a hydrochloric acid corrosion test chamber for coating corrosion resistance testing is made of corrosion-resistant materials for its body and all internal structures. It includes a test chamber 1 and an operating box 2 located on one side of the test chamber 1. The test chamber 1 has a sealing groove 11, and a cover 12 is hinged to it, resting on the sealing groove 11. A storage tank 21 and a pressure tank 22 are fixedly installed inside the operating box 2. A replenishment pipe 221 is fixedly installed on the pressure tank 22. An air valve 23 connected to the pressure tank 22 is installed on the operating box 2. The test chamber 1 contains... A spray column 7 is provided. A spray seat 71 is fixedly installed inside the test chamber 1. The spray seat 71 is connected to the storage tank 21. The spray column 7 is fixedly installed on the spray seat 71. An infusion pump is installed inside the spray seat 71. A glass nozzle 72 is fixedly installed on the spray column 7. The upper end of the glass nozzle 72 is connected to the spray seat 71. The lower end of the glass nozzle 72 is connected to the pressure tank 22 through a constant pressure valve. A collector 8 is fixedly installed inside the test chamber 1. A metering tank 81 is fixedly installed on the outer wall of the test chamber 1. The collector 8 penetrates the side wall of the test chamber 1 and is connected to the metering tank 81.

[0036] Test chamber 1 serves as the core testing space, providing a sealed and stable environment for coating corrosion testing. The sealing tank 11, in conjunction with the chamber cover 12, forms a reliable water seal by injecting deionized water, effectively preventing hydrochloric acid solution leakage during the test. This ensures test accuracy while avoiding corrosive hazards to operators and surrounding equipment from hydrochloric acid evaporation. Control box 2 provides auxiliary control functions. The pressure tank 22 is connected to an external air supply system via valve 23, pre-treating the raw compressed air. Valve 23 allows operators to precisely adjust the air pressure inside the pressure tank 22, providing stable power for hydrochloric acid solution delivery. The spray holder 71 is connected to the storage tank 21 to ensure a stable supply of hydrochloric acid solution to the spray column 7. The glass nozzle 72 on the spray column 7 has strong chemical stability and is not easily corroded by hydrochloric acid. It can maintain the integrity of the nozzle structure for a long time. Its lower port is connected to the pressure tank 22 through a constant pressure valve, which can strictly control the pressure at the nozzle, so that the hydrochloric acid solution atomized particles are uniform in size and create a corrosion environment that meets the standards. The collector 8 can efficiently collect the hydrochloric acid atomized particles and condensate that settle during the test, avoiding the accumulation of liquid in the test chamber 1 and affecting the test environment. The collected liquid is transported through a pipeline to the metering tank 81 on the outer wall. The metering tank 81 has a transparent structure and is marked with graduations. The staff can observe the changes in the liquid volume in the metering tank 81 to monitor the amount of hydrochloric acid solution settling in real time, and promptly judge whether the test environment meets the preset standards, providing a direct basis for monitoring the test process.

[0037] like Figure 6 - Figure 9As shown, a reciprocating mounting mechanism 4 is symmetrically installed inside the test chamber 1. The reciprocating mounting mechanism 4 includes a spline shaft 41, which is rotatably mounted on the test chamber 1. A spline sleeve 42 is slidably fitted on the spline shaft 41. Polygonal frames 43 are fixedly mounted at both ends of the spline sleeve 42. Extension rods 431 are symmetrically fixedly mounted on the polygonal frames 43. Protrusions 432 are fixedly mounted on the extension rods 431. Sleeves 441 are fixedly mounted on both sides of the test chamber 1. The sleeves 441 are fitted onto the spline shaft 41. A spiral guide groove 442 is opened on the sleeve 441, and the protrusions 432 are slidably mounted in the spiral guide groove 442. The reciprocating mounting mechanism 4 is symmetrically mounted on the test chamber 1, which can ensure that the power transmission and movement on both sides are synchronized, avoid structural displacement caused by unilateral force, and ensure the stability of the test. The spline shaft 41 and spline sleeve 42 are connected by a spline, which allows the spline shaft 41 to drive the spline sleeve 42 to rotate synchronously, while also allowing the spline sleeve 42 to slide along the axial direction of the spline shaft 41, providing a structural basis for the subsequent compound movement of the polygonal frame 43. The polygonal frame 43, as the core load-bearing structure for sample mounting, has symmetrically fixed extension rods 431 at both ends, allowing the protrusion 432 to precisely engage with the loop guide groove 442 on the sleeve 441. The protrusion 432 slides within the loop guide groove 442. When the spline shaft 41 drives the polygonal frame 43 to rotate, the protrusion 432 moves along the "reciprocating cycle" trajectory of the loop guide groove 442, thereby driving the polygonal frame 43 to move back and forth at a uniform speed along the axial direction of the spline shaft 41 while rotating, achieving a compound movement of rotation and translation, creating conditions for the sample to fully contact the corrosive environment. The sleeve 441 is fitted onto the spline shaft 41, which not only supports the spline shaft 41 and enhances its rotational stability, but also provides precise guidance for the protrusion 432 through the loop guide groove 442, ensuring that the movement trajectory of the polygonal frame 43 is controllable and regular, and avoiding the impact of movement deviation on the test results.

[0038] like Figure 6 and Figure 8 As shown, a material rack 5 is rotatably mounted at the vertex of the polygonal frame 43. The material rack 5 includes a gear 53 and a crossbar 51. The crossbar 51 is rotatably mounted on the polygonal frame 43, and the gear 53 is fixedly mounted at both ends of the crossbar 51. Triangular frames 52 are fixedly mounted at both ends of the crossbar 51, and V-shaped frames 54 are symmetrically fixedly mounted on the triangular frames 52. The material rack 5 is rotatably mounted at the vertex of the polygonal frame 43 and can reciprocate synchronously with the polygonal frame 43. Under the action of gravity, it always maintains a vertical position to the ground, ensuring the stability of the sample during movement and avoiding uneven corrosion caused by tilting. The crossbar 51 serves as the core support shaft of the material rack 5. The V-shaped frames 54 symmetrically fixed on the triangular frames 52 provide good clamping and fixing for coating samples of different sizes and shapes. This ensures that the samples do not loosen or fall off during the test, while reducing the contact area between the samples and the frame, maximizing the exposure of the sample surface to the corrosive environment and improving the accuracy of the test.

[0039] like Figure 2 and Figure 11 As shown, a toothed plate 6 is fixedly installed on the test chamber 1. The toothed plate 6 includes an arc-shaped plate 61, which is set with the axis of the spline shaft 41 as the center. The arc-shaped plate 61 has toothed protrusions 62. The arc-shaped plate 61 engages with the gear 53 through the toothed protrusions 62. The toothed plate 6 is fixed on the test chamber 1 and its position is stable and reliable. The arc-shaped plate 61 is set with the axis of the spline shaft 41 as the center. Its arc trajectory is adapted to the movement trajectory of the polygonal frame 43 driving the material rack 5, ensuring that the gear 53 can maintain a stable active engagement state with the toothed protrusions 62 when in contact with them, and avoiding tooth disengagement. The teeth 62 on the arc plate 61 are evenly distributed. Through meshing with the gear 53, the crossbar 51 can be driven to rotate smoothly around its own axis, thereby causing the tripod 52 and the V-shaped frame 54 to deflect at a certain angle. When the gear 53 separates from the toothed plate 6, the sample on the V-shaped frame 54 will produce a slight wobbling, ensuring that all surfaces of the sample can fully and evenly contact the hydrochloric acid atomized particles, and completely eliminating the test error caused by uneven local contact of the sample.

[0040] like Figure 2 - Figure 3 As shown, a drive mechanism 3 is installed on the test chamber 1. The drive mechanism 3 includes a servo motor 31, which is fixedly mounted on the test chamber 1. The output end of the servo motor 31 is fixedly connected to one of the spline shafts 41. A synchronous pulley 32 is fixedly mounted on the spline shaft 41, and a synchronous belt 33 is installed between the synchronous pulleys 32. The drive mechanism 3 provides power for the movement of the spline shaft 41. Its core component, the servo motor 31, is fixedly mounted on the test chamber 1 and is securely installed. The servo motor 31 has the characteristics of precise and controllable speed and stable output torque, which can provide a smooth and adjustable speed for the spline shaft 41 to meet the requirements of sample movement speed under different test conditions. The synchronous pulley 32 fixed on the spline shaft 41 cooperates with the synchronous belt 33 to synchronously transmit the power of the active spline shaft 41 to the other spline shaft 41, ensuring that the two spline shafts 41 rotate synchronously. This ensures that the movement of the reciprocating mounting mechanisms 4 on both sides is completely consistent, avoiding uneven force on the sample or deviation of the movement trajectory due to asynchronous movement on both sides, and ensuring the stability and accuracy of the test process.

[0041] It should be noted that the working process of the hydrochloric acid corrosion test chamber used for the coating corrosion resistance test is as follows:

[0042] Open the hinged lid 12 on the test chamber 1, and place the coating sample to be tested on the V-shaped frame 54 of the material rack 5. The V-shaped frame 54 is symmetrically fixed on the tripod 52, and the tripod 52 is fixed to both ends of the crossbar 51 to form a stable sample fixing structure. Then, inject deionized water into the test chamber 1 and the sealing groove 11, close the lid 12, and place the lid 12 on the pre-set sealing groove 11 of the test chamber 1. The deionized water in the sealing groove 11 ensures that a sealed space is formed inside the test chamber 1, avoiding subsequent leakage of hydrochloric acid solution that may affect the accuracy and safety of the test.

[0043] Next, the storage tank 21 inside the control box 2 is pre-stored with a sufficient amount of hydrochloric acid solution prepared with deionized water for continuous supply to the test. At the same time, the pressure tank 22 inside the control box 2 is replenished with liquid through the replenishment pipe 221. After the liquid replenishment is completed, the operator adjusts the air pressure in the pressure tank 22 through the air valve 23 set on the surface of the control box 2, so that the gas processed by the pressure tank 22 enters the glass nozzle 72, while the hydrochloric acid solution is transported along the pipeline to the spray seat 71 inside the test chamber 1. Subsequently, the hydrochloric acid solution enters the spray column 7 fixed on the spray seat 71, and is finally atomized and sprayed out through the glass nozzle 72 on the spray column 7. It is worth noting that the lower end of the glass nozzle 72 is directly connected to the pressure tank 22 through a constant pressure valve. The constant pressure valve can ensure the pressure at the nozzle is stable, so that the hydrochloric acid solution forms uniform and stable atomized particles, creating a standard corrosion environment in the test chamber 1.

[0044] While constructing the corrosive environment, the drive mechanism 3 is activated to achieve dynamic contact corrosion of the sample: its core component, the servo motor 31, is fixed to the outer wall of the test chamber 1. The output end of the servo motor 31 is fixedly connected to one of the spline shafts 41. When the servo motor 31 is powered on, it will directly drive the spline shaft 41 to rotate. Since both spline shafts 41 are fixedly fitted with synchronous pulleys 32, and the two synchronous pulleys 32 are connected by a synchronous belt 33, the actively rotating spline shaft 41 will drive the other spline shaft 41 to rotate synchronously through the cooperation of the synchronous pulley 32 and the synchronous belt 33, ensuring consistent power transmission on both sides.

[0045] When the spline shaft 41 rotates, it drives the polygonal frame 43 to rotate synchronously through the spline sleeve 42. Extension rods 431 are symmetrically fixed on both sides of the polygonal frame 43, and protrusions 432 are integrally formed at the ends of the extension rods 431. Correspondingly, guide components 44 are fixed at designated positions on both side walls of the test chamber 1. These components are centered around a sleeve 441 fitted onto the spline shaft 41. A loop-shaped guide groove 442 is formed on the side wall of the sleeve 441, and the protrusions 432 slide precisely within the loop-shaped guide groove 442. When the polygonal frame 43 rotates with the spline shaft 41, the protrusions 432 slide along the reciprocating trajectory of the loop-shaped guide groove 442. Constrained by this trajectory, the polygonal frame 43 can reciprocate at a uniform speed along the axial direction of the spline shaft 41 while rotating with it, achieving a combined rotational and translational motion. The combined motion of the reciprocating mounting mechanism 4 further drives the material rack 5 to move. The material rack 5 is hinged to the vertex of the polygonal frame 43 via a rotating shaft, allowing it to reciprocate synchronously with the polygonal frame 43. Under gravity, the material rack 5 remains perpendicular to the ground. Furthermore, gears 53 are fixed to both ends of the crossbar 51 of the material rack 5, and a toothed plate 6 is fixed inside the test chamber 1 at the corresponding positions of the gears 53. This toothed plate 6 is based on an arc-shaped plate 61, which is distributed in an arc shape with the axis of the spline shaft 41 as its center. Its inner sidewall is uniformly machined with toothed protrusions 62, and the gears 53 are in a movable meshing state with the toothed protrusions 62. When the material rack 5 rotates with the polygonal frame 43, the gears 53 roll along the toothed protrusions 62 of the arc-shaped plate 61, driving the crossbar 51 to rotate around its own axis through meshing transmission. This causes the triangular brackets 52 and V-shaped brackets 54 at both ends of the crossbar 51 to deflect at a certain angle. When gear 53 separates from tooth plate 6, the coating sample on V-shaped frame 54 will shake slightly, ensuring that all surfaces of the sample can fully and evenly contact the hydrochloric acid atomized particles in test chamber 1, thus completely avoiding test errors caused by uneven local contact of the sample.

[0046] Finally, the test process is monitored: A collector 8 is fixedly installed at the bottom of the test chamber 1. The collector 8 is funnel-shaped and can efficiently collect the hydrochloric acid atomized particles and condensed liquid that settle during the test. A pipe is connected to the bottom of the collector 8, which runs through the side wall of the test chamber 1. The other end of the pipe is connected to a metering tank 81 fixed to the outer wall of the test chamber 1. The collected liquid can flow into the metering tank 81 along the pipe. The staff can monitor the amount of hydrochloric acid solution settling in real time by observing the volume change of the liquid in the metering tank 81, and ensure that the test environment meets the preset standards. After the test reaches the preset time, the servo motor 31 and the air valve 23 are turned off, the chamber cover 12 is opened and the sample is taken out, and the entire coating corrosion resistance test process is completed.

[0047] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A hydrochloric acid corrosion test chamber for coating corrosion resistance test, comprising a test chamber (1) and an operation chamber (2) arranged on one side of the test chamber (1), a spray column (7) is arranged in the test chamber (1), characterized in that: The test box (1) is provided with a driving mechanism (3); Also includes: Reciprocating mounting mechanism (4), the reciprocating mounting mechanism (4) is symmetrically installed on the test box (1), the reciprocating mounting mechanism (4) includes a spline shaft (41), the spline shaft (41) is slidably sleeved with a spline sleeve (42), the spline sleeve (42) is fixedly provided with a polygonal frame (43) at both ends, and the test box (1) is provided with a guide assembly (44) on both sides. The rack (5) is rotatably arranged at the vertex position of the polygonal frame (43), and the rack (5) comprises a gear (53). The toothed plate (6) is fixedly arranged on the test box (1), and the toothed plate (6) is movably engaged with the gear (53). The spline shaft (41) is rotatably arranged on the test box (1), the polygonal frame (43) is fixedly provided with an extension rod (431) symmetrically, and the extension rod (431) is fixedly provided with a protrusion (432). The guide assembly (44) comprises a sleeve (441), the sleeve (441) is fixedly arranged on the test box (1), the sleeve (441) is sleeved on the spline shaft (41), the sleeve (441) is provided with a reverse guide groove (442), and the protrusion (432) is slidably arranged in the reverse guide groove (442). The rack (5) further comprises a cross bar (51), the cross bar (51) is rotatably arranged on the polygonal frame (43), the gear (53) is fixedly arranged at both ends of the cross bar (51), the cross bar (51) is fixedly provided with a triangular frame (52) at both ends, and the triangular frame (52) is fixedly provided with a V-shaped frame (54) symmetrically. The toothed plate (6) comprises an arc-shaped plate (61), the arc-shaped plate (61) is arranged with the spline shaft (41) as the center, the arc-shaped plate (61) is provided with a toothed protrusion (62), and the arc-shaped plate (61) is movably engaged with the gear (53) through the toothed protrusion (62).

2. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: The driving mechanism (3) comprises a servo motor (31), the servo motor (31) is fixedly arranged on the test box (1), the output end of the servo motor (31) is fixedly connected with one of the spline shafts (41), the spline shaft (41) is fixedly provided with a synchronous wheel (32), and the synchronous wheels (32) are provided with a synchronous belt (33) therebetween.

3. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: The operating box (2) is fixedly provided with a reagent storage tank (21) and a pressure bucket (22), the pressure bucket (22) is fixedly provided with a liquid supplementing pipe (221), and the operating box (2) is provided with an air valve (23) connected with the pressure bucket (22).

4. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 3, characterized in that: The test box (1) is fixedly provided with a spray seat (71), the spray seat (71) is communicated with the reagent storage tank (21), the spray column (7) is fixedly arranged on the spray seat (71), the spray column (7) is fixedly provided with a glass nozzle (72), the upper end of the glass nozzle (72) is connected with the spray seat (71), and the lower end of the glass nozzle (72) is connected with the pressure bucket (22) through a constant pressure valve.

5. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: The test box (1) is internally fixedly provided with a collector (8), an outer wall of the test box (1) is fixedly provided with a metering barrel (81), and the collector (8) is connected with the metering barrel (81) through the side wall of the test box (1).

6. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: The test box (1) is provided with a sealing groove (11), and the test box (1) is hingedly provided with a box cover (12), and the box cover (12) is arranged on the sealing groove (11).

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