Salt spray corrosion tester and use method thereof

Abstract

The invention discloses a salt spray corrosion tester and a use method thereof, and relates to the technical field of salt spray corrosion testers. The device comprises a tester body, a cover body, a control box and a spray tower, and further comprises a rotating shaft which is rotatably arranged in the tester body, a driving mechanism for driving the rotating shaft to rotate is arranged in the tester body, at least two groups of clamping assemblies are oppositely arranged on the rotating shaft, and each clamping assembly comprises a clamping plate which is slidably arranged on the rotating shaft through a sliding block; a sliding groove for the sliding block to slide is embedded in the rotating shaft, a clamping groove is embedded in the clamping plate, and the first spring is movably arranged in the sliding groove and abuts against the sliding block. The clamping assembly can adapt to samples of different sizes, manual adjustment is not needed, the operation convenience is improved, meanwhile, the clamping force on the samples is improved, the stability of the samples during rotation is enhanced, the phenomenon that the samples are loosened or fall off is avoided, and the test effect is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of salt spray corrosion testing instruments, specifically, it relates to a salt spray corrosion testing instrument and its usage method. Background Technology

[0002] In many fields such as industrial production, scientific research, and product quality testing, materials and products face various complex environmental factors during use. Among them, salt spray corrosion is a common and destructive form of corrosion. For materials and products used in environments with severe salt corrosion, it is essential to accurately assess their resistance to salt spray corrosion. In order to evaluate the salt spray corrosion resistance of materials and products, salt spray corrosion testing instruments have emerged. By simulating the salt spray environment, they provide an important testing method for studying the environmental adaptability and reliability of various materials and products in industries such as machinery, defense, light industry, electronics, and instrumentation. However, existing salt spray testing machines require manual flipping of metal samples one by one when flipping them, which is cumbersome. In addition, it requires opening the salt spray chamber, which disrupts the salt spray environment inside the chamber, resulting in the need to recreate the salt spray environment through equipment.

[0003] Chinese patent publication number CN218412216U discloses a salt spray corrosion testing machine. This device adds a horizontally arranged rotating shaft to the inner cavity of the salt spray chamber on the existing basis, and a clamping part is provided on the upper surface of the rotating shaft. The clamping part is adapted to the thickness of the steel sheet to be tested. By controlling the rotation angle of the rotating shaft, the tilt angle of the steel sheet can be changed to achieve flipping. No manual operation or opening of the salt spray chamber is required. However, the clamping force of the clamping part on the steel sheet is relatively small. When the rotating shaft rotates, the steel sheet may loosen or even fall off, affecting the test results.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a salt spray corrosion tester and its usage method, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A salt spray corrosion tester and its method of use, comprising: a tester body, a cover, a control box, and a spray tower, and a rotating shaft rotatably disposed inside the tester body. The tester body is provided with a drive mechanism for driving the rotating shaft to rotate. At least two sets of clamping assemblies are provided opposite to each other on the rotating shaft. Each clamping assembly includes a clamping plate, which is slidably disposed on the rotating shaft via a slider. The rotating shaft has a groove embedded therein for the slider to slide. The clamping plate has a clamping groove embedded therein. A first spring is movably disposed in the groove and abuts against the slider.

[0008] Optionally, a telescopic rod is movably provided on the clamping plate, a limiting plate is fixedly installed at the first end of the telescopic rod, a telescopic groove is provided in the clamping plate for the limiting plate and the telescopic rod to move, a second spring is sleeved on the telescopic rod and movably provided, the second spring is located in the telescopic groove and abuts against the limiting plate, and a fitting plate is fixedly installed at the second end of the telescopic rod extending to the outside of the clamping plate.

[0009] Optionally, the bonding plate has a guide end face that is inclined toward the clamping groove.

[0010] Optionally, the telescopic rod has a polygonal structure.

[0011] Optionally, two sets of corrugated sleeves are provided on the slide groove along the slider, with the two ends of the corrugated sleeves being fixedly connected to the slider and the inner wall of the slide groove, respectively.

[0012] Optionally, it also includes a connecting shaft, which is rotatably disposed within the body of the testing instrument. One end of the rotating shaft is rotatably disposed within the connecting shaft, and the other end is rotatably disposed on the body of the testing instrument. The driving mechanism is used to drive the connecting shaft to rotate. Multiple sets of clamping components are provided opposite to each other on the rotating shaft. Multiple limiting grooves are provided on the rotating shaft. Limiting components that limit the limiting grooves are provided on the connecting shaft.

[0013] Optionally, the limiting component includes:

[0014] A movable plate is movably disposed within the connecting shaft, and the connecting shaft is provided with a movable groove for the movable plate to move in. A limit rod is fixedly installed on the movable plate relative to the limit groove.

[0015] An L-shaped rod is fixedly installed on the end of the movable plate away from the limiting rod. A third spring is sleeved on the L-shaped rod and abuts against the movable plate. A second rack is vertically fixedly installed on the end of the L-shaped rod away from the movable plate.

[0016] A first rack is slidably disposed within the connecting shaft relative to the second rack, and a drive gear that meshes with the first rack and the second rack is rotatably connected within the connecting shaft.

[0017] Optionally, a pressure plate is fixedly connected to the drive end of the first rack.

[0018] Optionally, the pressure plate is an arc-shaped structure coaxial with the connecting shaft.

[0019] Optionally, a salt spray corrosion tester is used in a manner that includes the following steps:

[0020] S1. Open the cover, press the pressure plate to disengage the limiting rod from the limiting groove, then rotate the shaft to adjust the clamping component on the shaft to the specified position. After adjustment, release the pressure plate to allow the limiting rod to be inserted into the limiting groove to limit the shaft.

[0021] S2. Slide the sample into the clamping groove along the inclined surface. The top of the sample will press against the bonding plate, causing the telescopic rod and the limiting plate to move outward and compress the second spring. The elastic force of the second spring will keep the bonding plate in close contact with the sample surface.

[0022] S3. At the same time, the sample squeezes the clamping plate, causing the slider to slide in the groove and compress the first spring. The first spring generates a reaction force, which is transmitted to the clamping plate through the slider to clamp the sample.

[0023] S4. The drive mechanism is started by controlling the control box, which drives the rotating shaft to rotate, so that the clamping components and the sample rotate synchronously, and the spray tower sprays salt spray into the body of the test instrument.

[0024] S5. After the test, control the drive mechanism to stop running through the control box, open the rod to take out the sample, observe the surface corrosion and record the data.

[0025] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0026] 1. By setting up a clamping component, the sample is made to come into full contact with salt spray through the rotation of the shaft, simulating a more realistic corrosion environment and improving the reliability of the test results. The clamping component can adapt to samples of different sizes without manual adjustment, improving the convenience of operation. At the same time, it increases the clamping force on the sample, enhances the stability of the sample during rotation, avoids the sample from loosening or falling off, and ensures the test effect.

[0027] 2. By incorporating a telescopic rod, a bonding plate, and a second spring, the device can clamp samples of different widths, further enhancing its versatility.

[0028] 3. By setting up limiting components and limiting grooves, the rotation angle of the rotating shaft can be precisely controlled through the cooperation of the limiting components and limiting grooves, which improves the convenience of operation and makes it easier to control the clamping components to clamp the sample.

[0029] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 A structural diagram from another perspective;

[0033] Figure 3 This is a schematic diagram of the internal structure of the testing instrument body of the present invention;

[0034] Figure 4 This is a schematic diagram of the corrugated sleeve of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the clamping assembly of the present invention;

[0036] Figure 6 For the present invention Figure 5 A structural diagram from another perspective;

[0037] Figure 7 This is a schematic diagram of the connection between the connecting shaft and the rotating shaft of the present invention;

[0038] Figure 8 For the present invention Figure 7 A magnified structural diagram of point A in the middle.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Test instrument body; 2. Cover; 3. Control box; 4. Spray tower; 5. Rotating shaft; 6. Clamping assembly; 61. Clamping plate; 62. Clamping groove; 63. First spring; 64. Slide groove; 65. Slider; 7. Connecting shaft; 8. Pressure plate; 9. Limiting assembly; 91. First rack; 92. Drive gear; 93. Second rack; 94. L-shaped rod; 95. Movable plate; 96. Limiting rod; 97. Movable groove; 98. Third spring; 10. Guide end face; 11. Corrugated sleeve; 12. Adhesive plate; 13. Telescopic rod; 14. Second spring; 15. Telescopic groove; 16. Limiting plate; 17. Motor; 18. Chain and sprocket mechanism; 19. Limiting groove.

[0041] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0042] The invention will now be described in further detail with reference to the accompanying drawings.

[0043] Please see Figure 1-8 As shown, this embodiment provides a salt spray corrosion tester and its usage method, including a tester body 1, a cover 2, a control box 3, and a spray tower 4, and also includes a rotating shaft 5, which is rotatably disposed inside the tester body 1. The tester body 1 is provided with a drive mechanism for driving the rotating shaft 5 to rotate. At least two sets of clamping components 6 are provided opposite to each other on the rotating shaft 5. The clamping components 6 include a clamping plate 61, which is slidably disposed on the rotating shaft 5 by a slider 65. The rotating shaft 5 is embedded with a groove 64 for the slider 65 to slide. The clamping plate 61 is embedded with a clamping groove 62. A first spring 63 is movably disposed in the groove 64 and abuts against the slider 65.

[0044] Specifically, during the experiment, the sample to be tested is placed in the clamping grooves 62 of two sets of clamping plates 61 arranged opposite to each other. The sample squeezes the clamping plates 61, causing the slider 65 to slide in the groove 64 and compress the first spring 63. The first spring 63 generates a reaction force, which is transmitted to the clamping plates 61 through the slider 65, clamping the sample. The drive mechanism is activated, driving the rotating shaft 5 to rotate, so that the clamping assembly 6 and the sample rotate synchronously. The spray tower 4 sprays salt mist into the test instrument body 1. During the rotation, the sample is fully exposed to the salt mist environment. The control box 3 adjusts the test parameters (such as temperature, salt mist concentration, spraying time, etc.). The rotating shaft 5 continues to rotate, so that all areas of the sample surface are evenly contacted with the salt mist. This device simulates multi-angle corrosion scenarios in actual use. The rotation speed and time can be adjusted according to the test standards to ensure the consistency and repeatability of the corrosion effect. After the test, the drive mechanism stops, the rotating shaft 5 stops, the sample is taken out, the surface corrosion is observed and the data is recorded. The overall structure and operation steps are simple. The rotation of the rotating shaft 5 allows the sample to come into full contact with the salt spray, simulating a more realistic corrosion environment and improving the reliability of the test results. The elastic force of the first spring 63 can adapt to samples of different sizes without manual adjustment, improving the convenience of operation. At the same time, it increases the clamping force on the sample, enhances the stability of the sample during rotation, avoids the sample from loosening or falling off, and ensures the test effect.

[0045] It should be noted that in this embodiment, the installation positions, connection relationships, and working principles of the test instrument body 1, cover 2, control box 3, and spray tower 4 are all existing technologies and will not be described here.

[0046] In this embodiment, as Figures 4 to 6 As shown, a telescopic rod 13 is movably mounted on the clamping plate 61. A limiting plate 16 is fixedly installed at the first end of the telescopic rod 13. The clamping plate 61 has a telescopic groove 15 that allows the limiting plate 16 and the telescopic rod 13 to move. A second spring 14 is sleeved on and movably mounted on the telescopic rod 13. The second spring 14 is located in the telescopic groove 15 and abuts against the limiting plate 16. The second end of the telescopic rod 13 extends to the outside of the clamping plate 61 and is fixedly mounted with a fitting plate 12. The fitting plate 12 has a guide end face 10 that is inclined toward the clamping groove 62. The telescopic rod 13 has a polygonal structure. Specifically, when the sample is placed into the clamping groove 62, the inclined surface guides the sample to slide smoothly into the clamping groove 62. The top of the sample will press against the bonding plate 12, causing the telescopic rod 13 and the limiting plate 16 to move outward and compress the second spring 14. The elastic force of the second spring 14 keeps the bonding plate 12 in close contact with the sample surface, forming a dynamic clamping force and maintaining clamping stability. By setting the bonding plate 12 and the second spring 14, samples of different widths can be clamped, further improving the versatility of the device.

[0047] In this embodiment, as Figures 4 to 6 As shown, two sets of corrugated sleeves 11 are slidably provided on the slide groove 64 along the slider 65. The two ends of the corrugated sleeves 11 are fixedly connected to the slider 65 and the inner wall of the slide groove 64, respectively. Specifically, in this embodiment, two sets of corrugated sleeves 11 are slidably provided on each slide groove 64 along the slider 65. The corrugated sleeves 11 shield the slide groove 64 and are slidably provided on the rotating shaft 5. The sliding structure of the corrugated sleeves 11 is the prior art. The two ends of the corrugated sleeves 11 are fixedly connected to the slider 65 and the inner wall of the slide groove 64 on the side opposite to the slider 65. The corrugated sleeves 11 can form a sealing structure when the slider 65 slides, preventing salt spray and water vapor from entering the interior of the slide groove 64, isolating the salt spray environment, avoiding jamming or wear of the slide groove 64 and slider 65 due to corrosion, and extending the service life of the equipment. It should be noted that the material of the corrugated sleeves 11 can be rubber (such as fluororubber, silicone rubber, etc.).

[0048] In this embodiment, as shown in the figure, a connecting shaft 7 is also included, which is rotatably disposed within the testing instrument body 1. One end of a rotating shaft 5 is rotatably disposed within the connecting shaft 7, and the other end is rotatably disposed on the testing instrument body 1. A driving mechanism is used to drive the connecting shaft 7 to rotate. Multiple sets of clamping components 6 are provided on the rotating shaft 5, and multiple limiting grooves 19 are provided on the rotating shaft 5. The connecting shaft 7 is provided with limiting components 9 that limit the limiting grooves 19. The limiting components 9 include a movable plate 95, which is movably disposed within the connecting shaft 7. The connecting shaft 7 is provided with a movable groove 97 that allows the movable plate 95 to move. Limiting rods 96 and L-shaped rods 94 are fixedly installed on the movable plate 95 relative to the limiting grooves 19. A third spring 98, which abuts against the movable plate 95, is fixedly installed on one end of the movable plate 95 away from the limiting rod 96. A second rack 93 and a first rack 91 are vertically fixedly installed on the end of the L-shaped rod 94 away from the movable plate 95. The first rack 91 is slidably disposed within the connecting shaft 7 relative to the second rack 93. A drive gear 92, which meshes with the first rack 91 and the second rack 93, is rotatably connected within the connecting shaft 7. A pressure plate 8 is fixedly connected to the drive end of the first rack 91. The pressure plate 8 is an arc-shaped structure coaxial with the connecting shaft 7. Specifically, in this embodiment, a plurality of limiting grooves 19 are spaced along the circumference of the rotating shaft 5. A third spring 98 is provided on the connecting shaft 7 relative to the limiting rod 96. Two sets of limiting components 9 are provided. Furthermore, four sets of clamping components 6 are provided on the rotating shaft 5, arranged symmetrically in pairs (this can be adjusted according to actual conditions in other embodiments). Since the angles of the multiple clamping components 6 are different, when fixing the sample using the clamping components 6, the orientation of the multiple clamping components 6 can be adjusted by rotating the rotating shaft 5 to facilitate sample fixation. Specifically, in the initial state, the limiting rod 96 is inserted into the limiting groove 19 to position the rotating shaft 5. At this time, the rotating shaft 5 can rotate with the rotation of the connecting shaft 7. When adjusting the position of the clamping components 6 on the rotating shaft 5, the arc-shaped pressure plate 8 is manually pressed to drive... The first rack 91 moves inward, driving the drive gear 92 to rotate. The drive gear 92 meshes with the second rack 93, causing the second rack 93 to pull the movable plate 95 through the L-shaped rod 94, compressing the third spring 98. This causes the limiting rod 96 to retract into the movable groove 97, releasing the restriction on the rotating shaft 5. The rotating shaft 5 can then rotate within the connecting shaft 7 to adjust the orientation of the clamping assembly 6. After the orientation is adjusted, the pressure plate 8 is released, and the third spring 98 returns to its original position, allowing the limiting rod 96 to be inserted into the limiting groove 19 for positioning. Through the cooperation between the limiting groove 19 and the limiting assembly 9, the rotation angle of the rotating shaft 5 can be precisely controlled, improving the convenience of operation.

[0049] It should be noted that in this embodiment, there are multiple rotating shafts 5, which are spaced apart inside the main body 1 of the testing instrument. The connecting shafts 7 are arranged in equal numbers to the rotating shafts 5. The driving mechanism is used to drive the multiple connecting shafts 7 to rotate and thus rotate the rotating shafts 5. (Refer to...) Figure 7As shown, multiple sets of connecting shafts 7 are connected by a chain and sprocket mechanism 18. A motor 17 for driving the rotation of multiple connecting shafts 7 is fixedly installed inside the main body 1 of the testing instrument. The motor 17 is connected to the control system signal in the control box. The motor 17 is preferably a servo motor. The advantage of this is that it can accurately control the opening and closing of the shafts, and can adjust one of the shafts 5 individually through the limit component 9 according to the actual situation, thereby improving the effectiveness and flexibility of the device.

[0050] Furthermore, in this embodiment, the material of each spring can be a salt spray resistant material, such as stainless steel. Of course, the springs can also be zinc-plated, nickel-plated, chromium-plated, or coated with anti-corrosion coatings (such as epoxy paint or polyurethane coating) to isolate the salt spray from contact with the metal. The specific method can be adjusted according to the actual situation.

[0051] Working principle:

[0052] S1. Open the cover 2, press the pressure plate 8 to make the limiting rod 96 disengage from the limiting groove 19, then rotate the rotating shaft 5 to adjust the clamping component 6 on the rotating shaft 5 to the specified position, and after adjustment, release the pressure plate 8 so that the limiting rod 96 is inserted into the limiting groove 19 to limit the rotating shaft 5.

[0053] S2. Slide the sample into the clamping groove 62 along the inclined surface. The top of the sample will press against the bonding plate 12, causing the telescopic rod 13 and the limiting plate 16 to move outward and compress the second spring 14. The elastic force of the second spring 14 will keep the bonding plate 12 in close contact with the sample surface.

[0054] S3. At the same time, the sample squeezes the clamping plate 61, causing the slider 65 to slide in the groove 64 and compress the first spring 63. The first spring 63 generates a reaction force, which is transmitted to the clamping plate 61 through the slider 65 to clamp the sample.

[0055] S4. The drive mechanism is started by controlling the control box 3, which drives the rotating shaft 5 to rotate, so that the clamping assembly 6 and the sample rotate synchronously, and the spray tower 4 sprays salt spray into the test instrument body 1.

[0056] S5. After the test, control the drive mechanism to stop running through control box 3, open the rod to take out the sample, observe the surface corrosion and record the data.

[0057] This invention is not limited to the embodiments described above. Anyone should understand that structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention. Technical aspects, shapes, and structures not described in detail in this invention are all publicly known technologies.

Claims

1. A salt spray corrosion tester, comprising a tester body (1), a cover (2), a control box (3), and a spray tower (4), characterized in that, Also includes: A rotating shaft (5) is rotatably disposed inside the test instrument body (1). The test instrument body (1) is provided with a drive mechanism for driving the rotating shaft (5) to rotate. At least two sets of clamping assemblies (6) are provided opposite to each other on the rotating shaft (5). The clamping assemblies (6) include: A clamping plate (61) is slidably mounted on the rotating shaft (5) via a slider (65). The rotating shaft (5) has a groove (64) embedded in it for the slider (65) to slide. The clamping plate (61) has a clamping groove (62) embedded in it. A first spring (63) is movably disposed within the groove (64) and abuts against the slider (65).

2. The salt spray corrosion tester according to claim 1, characterized in that, The clamping plate (61) is movably provided with a telescopic rod (13). A limiting plate (16) is fixedly installed at the first end of the telescopic rod (13). The clamping plate (61) is provided with a telescopic groove (15) that allows the limiting plate (16) and the telescopic rod (13) to move. A second spring (14) is sleeved on the telescopic rod (13) and movably provided. The second spring (14) is located in the telescopic groove (15) and abuts against the limiting plate (16). The second end of the telescopic rod (13) extends to the outside of the clamping plate (61) and is fixedly installed with a fitting plate (12).

3. The salt spray corrosion tester according to claim 2, characterized in that, The bonding plate (12) has a guide end face (10) that is inclined toward the clamping groove (62).

4. A salt spray corrosion tester according to claim 3, characterized in that, The telescopic rod (13) has a polygonal structure.

5. A salt spray corrosion tester according to claim 1, characterized in that, Two sets of corrugated sleeves (11) are provided on the groove (64) and slide relative to the slider (65). The two ends of the corrugated sleeves (11) are fixedly connected to the slider (65) and the inner wall of the groove (64) respectively.

6. The salt spray corrosion tester according to claim 1, characterized in that, It also includes a connecting shaft (7), which is rotatably disposed within the test instrument body (1). One end of the rotating shaft (5) is rotatably disposed within the connecting shaft (7), and the other end is rotatably disposed on the test instrument body (1). The driving mechanism is used to drive the connecting shaft (7) to rotate. Multiple sets of clamping components (6) are provided on the rotating shaft (5) respectively. Multiple limiting grooves (19) are provided on the rotating shaft (5). Limiting components (9) that limit the limiting grooves (19) are provided on the connecting shaft (7).

7. A salt spray corrosion tester according to claim 6, characterized in that, The limiting component (9) includes: The movable plate (95) is movably disposed within the connecting shaft (7), and the connecting shaft (7) is provided with a movable groove (97) for the movable plate (95) to move within it. A limiting rod (96) is fixedly installed on the movable plate (95) relative to the limiting groove (19). An L-shaped rod (94) is fixedly installed on one end of the movable plate (95) away from the limiting rod (96). A third spring (98) is sleeved on the L-shaped rod (94) and abuts against the movable plate (95). A second rack (93) is vertically fixedly installed on one end of the L-shaped rod (94) away from the movable plate (95). The first rack (91) is slidably disposed in the connecting shaft (7) relative to the second rack (93), and the connecting shaft (7) is rotatably connected to a drive gear (92) that meshes with the first rack (91) and the second rack (93).

8. A salt spray corrosion tester according to claim 7, characterized in that, A pressure plate (8) is fixedly connected to the driving end of the first rack (91).

9. A salt spray corrosion tester according to claim 8, characterized in that, The pressure plate (8) is an arc-shaped structure coaxial with the connecting shaft (7).

10. A salt spray corrosion tester according to claims 1 to 9, the method of using it includes the following steps: S1. Open the cover (2), press the pressure plate (8) to make the limiting rod (96) disengage from the limiting groove (19), then rotate the rotating shaft (5) to adjust the clamping component (6) on the rotating shaft (5) to the specified position, and after adjustment, release the pressure plate (8) so that the limiting rod (96) is inserted into the limiting groove (19) to limit the rotating shaft (5); S2. Slide the sample into the clamping groove (62) along the inclined surface. The top of the sample will press the bonding plate (12), which will drive the telescopic rod (13) and the limiting plate (16) to move outward and compress the second spring (14). The elastic force of the second spring (14) will keep the bonding plate (12) in close contact with the sample surface. S3. At the same time, the sample squeezes the clamping plate (61), causing the slider (65) to slide in the groove (64) and compress the first spring (63). The first spring (63) generates a reaction force, which is transmitted to the clamping plate (61) through the slider (65) to clamp the sample. S4. The drive mechanism is started by controlling the control box (3), which drives the rotating shaft (5) to rotate, so that the clamping assembly (6) and the sample rotate synchronously, and the spray tower (4) sprays salt spray into the test instrument body (1); S5. After the test, control the drive mechanism to stop running through the control box (3), open the rod to take out the sample, observe the surface corrosion and record the data.

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