Hydrochloric acid corrosion test box for coating corrosion resistance test

Abstract

The invention belongs to the technical field of corrosion tests, and particularly relates to a hydrochloric acid corrosion test box for a coating corrosion resistance test, the hydrochloric acid corrosion test box comprises a test box and an operation box arranged on one side of the test box, a spraying column is arranged in the test box, and a driving mechanism is arranged on the test box; the hydrochloric acid corrosion test box for the coating corrosion resistance test further comprises reciprocating installation mechanisms, the reciprocating installation mechanisms are symmetrically installed on the test box, each reciprocating installation mechanism comprises a spline shaft, a spline sleeve is arranged on each spline shaft in a sliding and sleeving mode, and polygonal frames are fixedly arranged at the two ends of each spline sleeve. A convex block on the extension rod slides along a zigzag guide groove of a guide assembly sleeve, so that the polygonal frame realizes rotation and translation combined motion; meanwhile, the gear of the material frame is movably meshed with the tooth protrusions on the arc-shaped plate of the toothed plate, the sample is driven to deflect, and the sample shakes slightly when the gear is separated from the toothed plate. By means of the multi-dimensional motion design, all the surfaces of the sample can make contact with a corrosion medium comprehensively and evenly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of corrosion test, and particularly relates to a hydrochloric acid corrosion test box for coating corrosion resistance test. BACKGROUND

[0002] The hydrochloric acid corrosion test box is a special experimental equipment designed to evaluate the tolerance performance of materials in a hydrochloric acid corrosion environment. Its core function is to accurately simulate the erosion of various materials in a hydrochloric acid environment. Through controllable experimental conditions, the physical properties and chemical stability of the materials in the environment are systematically analyzed to scientifically predict the durability and reliability of the materials in actual application scenarios. Whether it is to verify the corrosion resistance life of parts under specific working conditions or to provide key performance data support for new material research and development, it can help researchers and enterprises to clearly understand the specific behavior characteristics of materials in a hydrochloric acid corrosion environment, and provide important experimental basis for product design optimization, material selection and quality control.

[0003] The existing test box adopts a static sample placement method. After the sample is fixed, it cannot realize multi-dimensional motion, resulting in uneven contact between the coating sample and the corrosion medium, and easy occurrence of local insufficient corrosion or excessive corrosion, which seriously affects the accuracy of the test results. SUMMARY

[0004] The purpose of the present application is to provide a hydrochloric acid corrosion test box for coating corrosion resistance test for dynamic detection of coating workpieces to solve the above problems.

[0005] The application achieves the above-mentioned purposes through the following technical solutions: A hydrochloric acid corrosion test box for coating corrosion resistance test, comprising a test box and an operation box arranged on one side of the test box, a spray column arranged in the test box, and a driving mechanism arranged on the test box. Further comprising: A reciprocating mounting mechanism symmetrically mounted on the test box, comprising a spline shaft, a spline sleeve slidably sleeved on the spline shaft, and a polygonal frame fixedly arranged at both ends of the spline sleeve, and a guide assembly arranged on both sides of the test box. A rack, which is rotatably arranged at the vertex position of the polygonal frame, comprises a gear. A toothed plate fixedly arranged on the test box, which is in movable engagement with the gear.

[0006] As a further optimization scheme of the present application, the spline shaft is rotatably arranged on the test box, the polygonal frame is symmetrically fixedly arranged with an extension rod, and the extension rod is fixedly arranged with a protruding block.

[0007] As a further optimization scheme of the present application, the guide assembly comprises a sleeve fixedly arranged on the test box, the sleeve is sleeved on the spline shaft, a meandering guide groove is formed on the sleeve, and the protruding block is slidably arranged in the meandering guide groove.

[0008] As a further optimization scheme of the present application, the rack further comprises a cross rod rotatably arranged on the polygonal frame, gears are fixedly arranged at two ends of the cross rod, triangular frames are fixedly arranged at two ends of the cross rod, and V-shaped frames are symmetrically fixedly arranged on the triangular frames.

[0009] As a further optimization scheme of the present application, the toothed plate comprises an arc-shaped plate, the arc-shaped plate is arranged with the axis of the spline shaft as the center, tooth protrusions are formed on the arc-shaped plate, and the arc-shaped plate is movably engaged with the gear through the tooth protrusions.

[0010] As a further optimization scheme of the present application, the driving mechanism comprises a servo motor fixedly arranged on the test box, an output end of the servo motor is fixedly connected with one of the spline shafts, synchronous wheels are fixedly arranged on the spline shafts, and a synchronous belt is arranged between the synchronous wheels.

[0011] As a further optimization scheme of the present application, a reagent storage tank and a pressure barrel are fixedly arranged in the operation box, a liquid supplementing pipe is fixedly arranged on the pressure barrel, and an air valve connected with the pressure barrel is arranged on the operation box.

[0012] As a further optimization scheme of the present application, a spray seat is fixedly arranged in the test box, the spray seat is communicated with the reagent storage tank, a spray column is fixedly arranged on the spray seat, a glass spray head is fixedly arranged on the spray column, an upper port of the glass spray head is connected with the spray seat, and a lower port of the glass spray head is connected with the pressure barrel through a constant pressure valve.

[0013] As a further optimization scheme of the present application, a collector is fixedly arranged in the test box, a metering barrel is fixedly arranged on the outer wall of the test box, and the collector is connected with the metering barrel through the side wall of the test box.

[0014] As a further optimization scheme of the present application, a sealing groove is formed on the test box, a box cover is hingedly arranged on the test box, and the box cover is arranged on the sealing groove.

[0015] The present application has the following beneficial effects: Different from the prior art, in actual use, when the spline sleeve drives the polygon frame to rotate, the protrusion on the extension rod slides along the meandering guide groove of the sleeve in the guide assembly, so that the polygon frame realizes a rotation plus translation compound motion; meanwhile, the gear of the material frame and the teeth protrusions on the arc plate of the tooth plate are in active engagement, so as to drive the sample to deflect, and when the gear and the tooth plate are separated, the sample will slightly shake. Such multi-dimensional motion design enables the surfaces of the sample to be fully and uniformly contacted with the corrosion medium, and is closer to the actual working condition, so that the test result has more reference value, and through simulation of the dynamic change in the actual working condition, the corrosion resistance life and performance stability of the coating in the real use environment can be more accurately evaluated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the internal structure of the present application; Figure 3 is a schematic diagram of the overall structure of the present application Figure 2 is a schematic diagram of the overall structure of the present application; Figure 4 is a schematic diagram of the spray column structure of the present application; Figure 5 is a schematic diagram of the local structure of the operation box of the present application; Figure 6 is a schematic diagram of the connection structure of the reciprocating mounting mechanism of the present application; Figure 7 is a schematic diagram of the overall structure of the present application Figure 6 is a schematic diagram of the enlarged structure at A in the present application; Figure 8 is a schematic diagram of the overall structure of the present application Figure 6 is a schematic diagram of the overall structure of the present application; Figure 9 is a schematic diagram of the overall structure of the present application Figure 8 is a schematic diagram of the enlarged structure at B in the present application; Figure 10 is a schematic diagram of the guide assembly structure of the present application; Figure 11 is a schematic diagram of the tooth plate structure of the present application.

[0017] In the figure: 1, test box; 11, sealing groove; 12, box cover; 2, operation box; 21, agent storage tank; 22, pressure barrel; 221, liquid supplementing pipe; 23, gas valve; 3, driving mechanism; 31, servo motor; 32, synchronous wheel; 33, synchronous belt; 4, reciprocating mounting mechanism; 41, spline shaft; 42, spline sleeve; 43, polygon frame; 431, extension rod; 432, protrusion; 44, guide assembly; 441, sleeve; 442, meandering guide groove; 5, material frame; 51, cross rod; 52, triangular frame; 53, gear; 54, V-shaped frame; 6, tooth plate; 61, arc plate; 62, tooth protrusion; 7, spray column; 71, spray seat; 72, glass shower head; 8, collector; 81, metering barrel. Detailed Implementation

[0018] 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.

[0019] Example 1, such 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. The test box 1 serves as a core test space to provide a closed and stable environment for the coating corrosion test; the sealing groove 11 is built with the box cover 12, and a reliable water seal can be formed by injecting deionized water in the groove, which effectively prevents the leakage of hydrochloric acid solution during the test, ensuring the test accuracy and avoiding the corrosion hazards to the operating personnel and surrounding equipment caused by the volatilization of hydrochloric acid. The operation box 2 undertakes auxiliary control functions, the pressure barrel 22 is connected with the external gas supply system through the gas valve 23, and the "raw compressed air" is pretreated, the gas valve 23 is convenient for the staff to accurately adjust the air pressure in the pressure barrel 22, and provides stable power for the delivery of hydrochloric acid solution. The spray seat 71 is connected with the reagent tank 21, which ensures the stable delivery 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 easy to be corroded by hydrochloric acid, and can keep the nozzle structure intact for a long time, and the lower end of the nozzle is connected with the pressure barrel 22 through the constant pressure valve, which can strictly control the pressure at the nozzle, so that the hydrochloric acid solution atomization particles are uniform and consistent in size, and the corrosion environment meeting the standard is constructed; the collector 8 can efficiently collect the settled hydrochloric acid atomization particles and condensed liquid in the test, avoid the accumulation of liquid in the test box 1 to affect the test environment, and the collected liquid is delivered to the metering barrel 81 on the outer wall through the pipeline, the metering barrel 81 is transparent structure, and the scale is marked on it, the staff can observe the change of liquid volume in the metering barrel 81, real-time monitor the settlement amount of hydrochloric acid solution, and timely judge whether the test environment meets the preset standard, to provide intuitive basis for test process monitoring.

[0020] As Figure 6 Figure 9 ​As shown, the test box 1 is symmetrically provided with a reciprocating mounting mechanism 4, which comprises a spline shaft 41 rotatably arranged on the test box 1, a spline sleeve 42 slidably arranged on the spline shaft 41, and a polygon frame 43 fixedly arranged at both ends of the spline sleeve 42, and the polygon frame 43 is symmetrically provided with an extension rod 431, and the extension rod 431 is fixedly provided with a protrusion 432, and the test box 1 is fixedly provided with a sleeve 441, and the sleeve 441 is sleeved on the spline shaft 41, and the sleeve 441 is provided with a meandering guide groove 442, and the protrusion 432 is slidably arranged in the meandering guide groove 442; the reciprocating mounting mechanism 4 is symmetrically arranged on the test box 1, which can ensure that the power transmission and movement on both sides are synchronous, avoid structural deviation caused by unilateral stress, and ensure test stability. The spline shaft 41 and the spline sleeve 42 are connected by spline, which can realize synchronous rotation of the spline sleeve 42 driven by the spline shaft 41, and allow the spline sleeve 42 to slide along the spline shaft 41, providing a structural basis for the subsequent composite motion of the polygon frame 43. The polygon frame 43 is the core bearing structure for sample mounting, and the extension rod 431 fixedly arranged at both ends of the polygon frame 43 can make the protrusion 432 accurately match the meandering guide groove 442 on the sleeve 441; the protrusion 432 is slidably embedded in the meandering guide groove 442, and when the spline shaft 41 drives the polygon frame 43 to rotate, the protrusion 432 will move along the "reciprocating cycle" track of the meandering guide groove 442, thereby driving the polygon frame 43 to move uniformly and reciprocally along the spline shaft 41 while rotating, realizing the composite motion of rotation plus translation, and creating conditions for the sample to fully contact the corrosion environment. The sleeve 441 is sleeved on the spline shaft 41, which not only supports the spline shaft 41 and enhances its rotation stability, but also provides accurate guidance for the protrusion 432 through the meandering guide groove 442, ensuring that the motion track of the polygon frame 43 is controllable and regular, and avoiding the influence of motion deviation on test results.

[0021] As shown in Figure 6 and Figure 8 , a material rack 5 is rotatably arranged at the vertex position of the polygon frame 43, and the material rack 5 comprises a gear 53 and a cross rod 51, the cross rod 51 is rotatably arranged on the polygon frame 43, the gear 53 is fixedly arranged at both ends of the cross rod 51, triangular frames 52 are fixedly arranged at both ends of the cross rod 51, and V-shaped frames 54 are symmetrically fixedly arranged on the triangular frames 52; the material rack 5 is rotatably arranged at the vertex position of the polygon frame 43, and can reciprocate synchronously with the polygon frame 43, and always maintains a vertical ground state under the action of gravity, ensuring that the posture of the sample is stable during movement, and avoiding uneven local corrosion caused by an inclined posture. The cross rod 51 is the core support shaft of the material rack 5, and the V-shaped frames 54 fixedly arranged on the triangular frames 52 have a V-shaped structure that can effectively clamp and fix coating samples of different sizes and shapes, ensuring that the samples do not loosen or fall off during the test, and reducing the contact area between the samples and the rack body, so that the sample surface is exposed to the corrosion environment as much as possible, improving the test accuracy.

[0022] As shown in Figure 2 and Figure 11 The toothed plate 6 is fixedly arranged on the test box 1, the toothed plate 6 includes an arc-shaped plate 61, the arc-shaped plate 61 is arranged with the axis of the spline shaft 41 as the center, the arc-shaped plate 61 is provided with a toothed protrusion 62, the arc-shaped plate 61 is movably engaged with the gear 53 through the toothed protrusion 62, the toothed plate 6 is fixed on the test box 1, the position is stable and reliable, the arc-shaped plate 61 is arranged with the axis of the spline shaft 41 as the center, the arc-shaped track is matched with the movement track of the material rack 5 driven by the polygonal frame 43, so that when the gear 53 is in contact with the toothed protrusion 62, the gear 53 can keep a stable movable engagement state with the toothed protrusion 62, and the tooth disengagement phenomenon is avoided. The toothed protrusions 62 arranged on the arc-shaped plate 61 are uniformly distributed, and through the meshing transmission with the gear 53, the horizontal rod 51 can be driven to stably rotate around the axis thereof, and then the triangular frame 52 and the V-shaped frame 54 are deflected by a certain angle. When the gear 53 is separated from the toothed plate 6, the sample on the V-shaped frame 54 will produce a small amplitude of shaking, so that each surface of the sample can be fully and uniformly contacted with the hydrochloric acid atomized particles, and the test error caused by uneven local contact of the sample is completely eliminated.

[0023] As shown in Figure 2 - Figure 3 The driving mechanism 3 is arranged on the test box 1, the driving mechanism 3 includes 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. The driving mechanism 3 provides power for the movement of the spline shaft 41, the core component servo motor 31 of which is fixed on the test box 1, the installation is stable, and the servo motor 31 has the characteristics of precise controllable rotating speed and stable output torque, can provide stable and adjustable rotating speed for the spline shaft 41, and meets the requirements of the sample movement speed under different test conditions. The synchronous wheels 32 fixed on the spline shaft 41 are matched with the synchronous belt 33, can synchronously transmit the power of the driving spline shaft 41 to the other spline shaft 41, ensure that the two spline shafts 41 rotate synchronously, and then make the movements of the two-sided reciprocating installation mechanisms 4 completely consistent, avoid the uneven force or movement track deviation of the sample caused by the asynchronous movement of the two sides, and protect the stability and accuracy of the test process.

[0024] It should be noted that the salt acid corrosion test box for the corrosion resistance test of the coating has the following working process: Open the hinged box cover 12 of the test box 1, place the coating sample to be tested on the V-shaped frame 54 of the rack 5, and the V-shaped frame 54 is symmetrically fixed on the triangular frame 52, and the triangular frame 52 is fixed at both ends of the horizontal rod 51 to form a stable sample fixing structure; then deionized water is injected into the test box 1 and the sealing groove 11, the box cover 12 is closed, the box cover 12 is placed on the pre-set sealing groove 11 of the test box 1, and the deionized water in the sealing groove 11 ensures that the inside of the test box 1 forms a closed space, avoiding the leakage of subsequent hydrochloric acid solution affecting the test accuracy and safety. Then, the reagent tank 21 fixed inside the operation box 2 pre-stores a sufficient amount of hydrochloric acid solution prepared by deionized water, which is used to continuously supply the test; at the same time, the pressure barrel 22 in the operation box 2 is supplemented by the liquid supplementing pipe 221, after completing the liquid supplementing, the staff adjusts the air pressure in the pressure barrel 22 through the air valve 23 arranged on the surface of the operation box 2, so that the gas treated by the pressure barrel 22 enters the glass spray head 72, and the hydrochloric acid solution is transported to the spray seat 71 inside the test box 1 along the pipeline, then 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 spray head 72 on the spray column 7. It is worth noting that the lower port of the glass spray head 72 is directly connected with the pressure barrel 22 through the constant pressure valve, and the constant pressure valve can ensure that the pressure at the spray head is stable, so that the hydrochloric acid solution forms uniform and stable atomized particles, and a standard corrosion environment is constructed in the test box 1. At the same time of constructing the corrosion environment, the driving mechanism 3 is started to realize the dynamic contact corrosion of the sample: the core component servo motor 31 is fixed on the outer side wall of the test box 1, the output end of the servo motor 31 is fixedly connected with one of the spline shafts 41, when the servo motor 31 is powered on and started, it will directly drive the spline shaft 41 to rotate; since the spline shafts 41 are both fixedly sleeved with synchronous wheels 32, and the two synchronous wheels 32 are transmissionally connected through the synchronous belt 33, therefore, the spline shaft 41 driven to rotate will drive the other spline shaft 41 to synchronously rotate through the cooperation of the synchronous wheels 32 and the synchronous belt 33, ensuring the consistency of power transmission on both sides.

[0025] When the spline shaft 41 rotates, the polygon frame 43 is driven to rotate synchronously by the spline sleeve 42. The extension rods 431 are symmetrically fixed on both sides of the polygon frame 43, and the protrusions 432 are integrally formed at the ends of the extension rods 431. Correspondingly, the guide assemblies 44 are fixed at the specified positions of the two side walls of the test box 1. The assemblies have sleeve 441s that are sleeved on the spline shaft 41, and the side walls of the sleeve 441s are provided with meandering guide grooves 442. The protrusions 432 are slidably embedded in the meandering guide grooves 442. When the polygon frame 43 rotates with the spline shaft 41, the protrusions 432 slide along the "reciprocating cycle" track of the meandering guide grooves 442. Due to the track limitation, the polygon frame 43 can move at a constant speed along the spline shaft 41 while rotating with the spline shaft 41, realizing the composite motion of rotation and translation. The composite motion of the reciprocating mounting mechanism 4 further drives the material frame 5 to move. The material frame 5 is hingedly connected to the top point of the polygon frame 43 through a rotating shaft, and can reciprocate synchronously with the polygon frame 43. In addition, the material frame 5 always maintains a vertical state to the ground under the action of gravity. Furthermore, the gear 53 is fixed at the ends of the cross rod 51 of the material frame 5, and the toothed plate 6 is fixed at the corresponding position inside the test box 1. The toothed plate 6 has an arc-shaped plate 61 as the main body, which is arranged in an arc shape with the spline shaft 41 as the center, and the inner side wall is uniformly processed with tooth protrusions 62. The gear 53 and the tooth protrusions 62 are in an active engagement state. When the material frame 5 rotates with the polygon frame 43, the gear 53 rolls along the tooth protrusions 62 of the arc-shaped plate 61, drives the cross rod 51 to rotate around its own axis through meshing transmission, and further makes the triangular frame 52 and the V-shaped frame 54 at the ends of the cross rod 51 deflect by a certain angle. When the gear 53 is separated from the toothed plate 6, the coating sample on the V-shaped frame 54 will produce a small amplitude of shaking, ensuring that all surfaces of the sample can fully and uniformly contact the hydrochloric acid atomized particles in the test box 1, and completely avoiding the test error caused by uneven local contact of the sample.

[0026] Finally, the test process is monitored. The collector 8 is fixedly arranged at the bottom of the test box 1, and has a funnel shape, which can efficiently collect the hydrochloric acid atomized particles and condensed liquid that are deposited during the test process. The bottom of the collector 8 is connected with a pipeline that penetrates through the side wall of the test box 1, and the other end of the pipeline is in communication with the metering barrel 81 fixed on the outer wall of the test box 1. The collected liquid can flow into the metering barrel 81 along the pipeline. The staff can monitor the deposition amount of the hydrochloric acid solution in real time by observing the volume change of the liquid in the metering barrel 81, so as to ensure that the test environment meets the preset standard. After the test reaches the preset time, the servo motor 31 and the air valve 23 are closed, the box cover 12 is opened, and the sample is taken out, so that the whole coating corrosion resistance test process is completed.

[0027] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

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 of the polygonal frame (43), and the rack (5) comprises a gear (53). The tooth plate (6) is fixedly arranged on the test box (1), and the tooth plate (6) is movably engaged with the gear (53).

2. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: 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).

3. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 2, characterized in that: 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).

4. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: 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.

5. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 1, characterized in that: The tooth 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 tooth protrusion (62), and the arc-shaped plate (61) is movably engaged with the gear (53) through the tooth protrusion (62).

6. 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.

7. 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).

8. The salt spray corrosion test chamber for coating corrosion resistance test according to claim 7, 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 port of the glass nozzle (72) is connected with the spray seat (71), and the lower port of the glass nozzle (72) is connected with the pressure bucket (22) through a constant pressure valve.

9. 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).

10. The salt spray corrosion test chamber for coating corrosion resistance testing 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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