Performance detection device for inorganic coating
By designing an inorganic coating testing device with four-point contact between the support and the substrate, the problem of the perpendicularity between the spindle and the curved substrate was solved, thereby improving the accuracy and reliability of coating adhesion testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOUTH CHINA AGRICULTURAL UNIVERSITY
- Filing Date
- 2026-04-14
- Publication Date
- 2026-05-12
AI Technical Summary
In the prior art, when testing the adhesion of coatings on curved surfaces, the spindle cannot be perpendicular to the tangent plane of the test point on the substrate, resulting in low adhesion values and inaccurate results.
An inorganic coating performance testing device was designed. The device uses a support member to make four-point contact with the substrate at the test location. The perpendicular bisector theorem is used to ensure that the spindle is perpendicular to the tangent plane of the test point on the substrate. The device also uses structures such as an annular liquid bladder and elastic gaskets to reduce the lateral force, thereby improving the accuracy and reliability of the test.
It effectively reduces the probability of lateral force generation, improves the accuracy of adhesion measurement and the precision of test results, and ensures the true bonding strength assessment of curved coatings.
Smart Images
Figure CN122016642A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coating adhesion testing technology, and in particular to a performance testing device for inorganic coatings. Background Technology
[0002] Coating adhesion testing is a core method for evaluating the bonding effect between the coating and the substrate, directly affecting the coating's durability, protective life, and engineering safety. The pull-out method, as a quantitative testing method, requires the standard procedure of vertically attaching a test spindle to the coating surface using a special adhesive. After curing, the instrument pulls the spindle vertically at a uniform speed until the coating detaches, recording the maximum pull-out force. In many industrial fields (such as petrochemicals, shipbuilding, and marine engineering), the coating substrate (such as pipelines, storage tanks, and steel structures) often has complex curved surfaces. These areas experience uneven paint film thickness and concentrated curing stress. Problems such as these are often weak areas of adhesion, thus requiring targeted testing before construction. However, the standard drawing spindles currently used have a flat bottom surface. When bonding to curved surfaces, it is difficult to ensure that its axis is perpendicular to the local tangent plane of each test point. This deviation causes lateral force to be generated during the drawing process, resulting in a peeling effect on the coating, rather than an ideal pure drawing force. As a result, not only will the adhesion measurement value be lower, but the standardized testing conditions will also be violated, leading to distorted data that cannot accurately reflect the true bonding strength of the curved surface coating, thereby affecting the accurate assessment of project quality. Summary of the Invention
[0003] This invention provides a performance testing device for inorganic coatings to overcome the shortcomings of existing adhesion testing methods for coatings on curved surfaces, where the spindle cannot be guaranteed to be perpendicular to the tangential plane of the test point on the substrate, resulting in low adhesion test values.
[0004] The technical solution is as follows: A performance testing device for inorganic coatings, comprising: a reaction frame, a reset rod slidably connected inside the reaction frame, a piston slidably connected to the reset rod, a puller threadedly connected to the reset rod, the puller having annularly distributed through holes, each through hole containing a steel ball, a limiting cylinder slidably connected to the reaction frame for limiting the steel balls, an elastic element fixedly connected between the limiting cylinder and the puller, a spindle provided in the puller, the spindle being limited by the steel balls, and a support member provided in the spindle, the position of the spindle being determined by the support member abutting at four points with the test location.
[0005] Furthermore, the spindle is provided with four receiving grooves, and the support member consists of four vertical parts, two abutting parts and two connecting parts. The receiving grooves are used to accommodate the corresponding vertical parts, so that the vertical parts can slide along the receiving grooves.
[0006] Furthermore, the spindle is provided with a frustum portion, and both of the abutting portions are in contact with the frustum portion.
[0007] Furthermore, a removable component is provided on the spindle near the support member. The removable component has four limiting parts, and the receiving groove limits the removable component through the limiting parts.
[0008] Furthermore, the limiting part is provided with a limiting inclined surface, and the spindle is provided with a locking inclined surface that contacts the limiting inclined surface. The locking inclined surface and the limiting inclined surface are used to limit the orientation of the force component of the limiting part.
[0009] Furthermore, a guide slope is provided in the receiving groove, and the vertical part is located between the adjacent guide slope and the adjacent limiting part. The guide slope is used to limit the direction of the component force of the vertical part when it is squeezed.
[0010] Furthermore, a flexible cylinder is fitted onto the spindle near the easily detachable component, the flexible cylinder being used to block the flow of adhesive liquid.
[0011] Furthermore, the reaction frame is provided with a receiving annular groove on the side near the spindle, the reaction frame is fixedly connected to an annular liquid bladder and a limiting ring, the annular liquid bladder is fixedly connected to an elastic ring on the side near the limiting ring, the annular liquid bladder, the elastic ring and the limiting ring are placed in the receiving annular groove in sequence, and the limiting ring is slidably connected to annularly distributed abutment posts, the abutment posts being fixedly connected to the elastic ring.
[0012] Furthermore, the abutting post is slidably connected to a connecting post, and an elastic washer is fixed between the connecting post and the abutting post. The connecting post is fixedly connected to an abutting member that abuts against the adjacent abutting post. Two elastic strips are fixedly connected to each of the limiting rings near the abutting member. The abutting member limits the adjacent abutting post by embedding itself into the adjacent elastic strip.
[0013] Furthermore, the lower end of the connecting column is fixedly connected with a pad, and two adjacent connecting columns are connected together by a connecting member for limiting and sliding.
[0014] The present invention has at least the following beneficial effects: The present invention makes the spindle perpendicular to the tangent plane of the substrate test point by having the support member contact the four points next to the test point of the substrate according to the perpendicular bisector theorem. In this way, the probability of lateral force is reduced during the adhesion test, thereby improving the accuracy of the adhesion measurement.
[0015] By linking the movement of all circumferential abutment columns into a single unit through an annular liquid bladder, all abutment columns can abut against the substrate. Thus, when inspecting pipe-like substrates, the abutment columns can provide multi-point circumferential support for the reaction frame, reducing the probability of substrate deformation caused by local stress concentration, thereby improving the accuracy of coating adhesion test results.
[0016] The contact state between the connecting post and the substrate is determined by the deformation of the elastic washer. After all the connecting posts are in contact with the substrate, the pull-out force provides a reaction force to the reaction frame, causing the abutment post and the connecting post to move relative to each other. This causes the abutment part to deform and embed into the elastic strip, locking the position of the abutment post. In this way, the probability of the reaction frame shifting due to uneven deformation of adhesive, coating, etc., is reduced during the application of pull-out force. This reduces the probability of lateral force and improves the reliability of the test results. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the reset rod and limiting cylinder of the present invention; Figure 3 This is a three-dimensional structural cross-sectional view of the reaction frame and limiting cylinder of the present invention; Figure 4 This is a three-dimensional structural cross-sectional view of the drawing member and the limiting cylinder of the present invention; Figure 5 This is a three-dimensional structural diagram of the spindle and support of the present invention; Figure 6 This is an exploded view of the spindle, support member, and easy-to-disassemble part of the present invention; Figure 7 This is a three-dimensional structural diagram of the abutment post and elastic strip of the present invention; Figure 8 This is a three-dimensional structural diagram of the connecting column and the abutment of the present invention.
[0018] The following are the label names in the diagram: 1. Reaction frame, 2. Reset rod, 3. Piston, 4. Pulling component, 5. Steel ball, 6. Limiting cylinder, 7. Elastic component, 8. Spindle, 801. Receiving groove, 802. Frustum, 803. Locking ramp, 804. Guide ramp, 9. Support component, 901. Vertical part, 902. Abutting part, 903. Connecting part, 10. Easy-to-disassemble component, 101. Limiting part, 102. Limiting ramp, 11. Flexible cylinder, 12. Annular liquid bladder, 121. Receiving ring groove, 13. Elastic ring, 14. Limiting ring, 15. Abutting post, 16. Connecting post, 17. Elastic washer, 18. Abutting component, 19. Elastic strip, 20. Foot, 21. Connecting component. Detailed Implementation
[0019] To make the above features and advantages of the present invention more readily understood, specific embodiments are described below in conjunction with the accompanying drawings, but the present invention is not limited thereto. Example 1
[0020] This embodiment provides a performance testing device for inorganic coatings to solve the problem that the adhesion test of coatings on curved surfaces is often performed poorly because the spindle cannot be guaranteed to be perpendicular to the tangent plane of the test point on the substrate.
[0021] It should be noted that this article uses the pull-out force test of pipe-type substrates as an example for description.
[0022] See Figures 1 to 6 An inorganic coating performance testing device includes: a reaction frame 1, a reset rod 2 sealed and slidably connected inside the reaction frame 1, a piston 3 fixedly connected to the reset rod 2 and sealed and slidably connected to the reaction frame 1, a pull member 4 threadedly connected to the reset rod 2, the pull member 4 having annularly distributed through holes, each through hole containing a steel ball 5, a limiting cylinder 6 slidably connected to the reaction frame 1 for limiting the steel balls 5, and an elastic element 7, selected as a tension spring, fixedly connected between the limiting cylinder 6 and the pull member 4; the reaction frame 1, reset rod 2, piston 3, and pull member 4 are all included. The pull-out component 4, steel ball 5, limiting cylinder 6, and elastic component 7 together constitute the pull-out force test head in the existing technology. The reaction frame 1 is connected to the air supply monitoring module through a conduit. The air supply monitoring module generates a pull-out force by pushing the piston 3 with air pressure. The air supply monitoring module can obtain the pull-out force corresponding to the coating being pulled off by monitoring the maximum air pressure value during the air supply process. The pull-out component 4 is equipped with a spindle 8. The pull-out component 4 limits the spindle 8 through the steel ball 5. The spindle 8 is equipped with a support component 9. The position of the spindle 8 is determined by the four points of contact between the support component 9 and the position to be tested.
[0023] The above setup enables the support member 9 to contact four points next to the test location on the substrate, and according to the perpendicular bisector theorem, the spindle 8 is made perpendicular to the tangent plane of the test point on the substrate. In this way, the probability of lateral force generation is reduced during the adhesion test, thereby improving the accuracy of the adhesion measurement.
[0024] See Figure 5 and Figure 6 The spindle 8 is provided with four receiving grooves 801, which are arranged in a rectangular shape. The support member 9 consists of four vertical parts 901, two abutting parts 902 and two connecting parts 903. The receiving grooves 801 are used to accommodate the corresponding vertical parts 901, so that the vertical parts 901 can slide along the receiving grooves 801.
[0025] The above setup enables the support member 9 to be limited by all the receiving grooves 801, and allows the support member 9 to slide along the axis of the spindle 8. Thus, for the detection of substrates of different specifications, the distance between the spindle 8 and the substrate can be adjusted while the auxiliary spindle 8 and the tangential plane of the substrate to be measured are kept perpendicular.
[0026] It should be noted that in this embodiment, the receiving groove 801 is only used and can just accommodate the vertical part 901.
[0027] See Figure 5 and Figure 6 The spindle 8 is provided with a frustum portion 802. The diameter of the frustum portion 802 gradually increases from bottom to top, and the angle between the generatrix of the frustum portion 802 and the vertical line is no greater than 3°. Both abutment portions 902 are in contact with the frustum portion 802. During the sliding of the support member 9 along the spindle 8, the abutment portion 902 is pressed by the frustum portion 802, causing the abutment portion 902 to be taut and deformed. With the help of the friction between the abutment portion 902 and the frustum portion 802, the relative position of the support member 9 and the spindle 8 is locked in real time during the sliding of the support member 9 along the spindle 8.
[0028] Testing Procedure: Place the pipe substrate to be tested flat, ensuring its axis is horizontal. Adjust the test point on the upper side of the substrate. Apply adhesive to the underside of spindle 8. Adjust the positions of spindle 8 and support 9 so that spindle 8 is directly above the test point, and the two connecting parts 903 of support 9 are positioned on either side of the vertical plane containing the substrate axis. Adjust the position of support 9 so that the lower ends of all four vertical parts 901 are in contact with the substrate surface. At this point, the axis of spindle 8 is perpendicular to and intersects the axis of the substrate. Press spindle 8 towards the substrate to reduce the distance between spindle 8 and the substrate until the adhesive on spindle 8 is in full contact with the substrate. Stop pressing spindle 8 and wait for the adhesive to solidify. Use a tool to cut and separate the coating below the horizontal projection of spindle 8 from the coating on the rest of the substrate surface. Begin adhesion testing.
[0029] During testing, the spindle 8 is fixed to the puller 4 using the puller 4, steel ball 5, and limiting cylinder 6. Then, air is injected into the reaction frame 1 through the air supply monitoring module, causing the reaction frame 1 to slide downward relative to the spindle 8 until the lower side of the reaction frame 1 contacts the substrate. By continuously injecting air into the reaction frame 1, the pressure inside the reaction frame 1 gradually increases. Under the action of air pressure, the pull force applied to the spindle 8 gradually increases until the spindle 8 and the adhesive together detach the coating from the substrate surface. Then, the injection of air into the reaction frame 1 is stopped. During this process, the air supply monitoring module monitors the air pressure inside the reaction frame 1 in real time, and the pull force corresponding to the maximum air pressure value inside the reaction frame 1 is the maximum pull force corresponding to the coating. Example 2
[0030] This embodiment is a further optimization based on Embodiment 1.
[0031] See Figure 5 and Figure 6 The lower part of the spindle 8 is provided with a removable part 10, which is provided with four limiting parts 101. The receiving groove 801 limits the removable part 10 through the limiting parts 101. The support member 9 is made of elastic material.
[0032] The above setup enables the easy-to-remove part 10 to directly contact the adhesive liquid. After the adhesion test is completed, the easy-to-remove part 10 can be directly removed from the spindle 8 and discarded. For large-scale testing, this can save time cleaning the adhesive liquid and improve testing efficiency.
[0033] It should be noted that in this embodiment, the receiving groove 801 is used not only to receive the vertical part 901, but also to limit the limiting part 101.
[0034] See Figure 6 The limiting part 101 is provided with a limiting inclined surface 102, and the spindle 8 is provided with a locking inclined surface 803 that contacts the limiting inclined surface 102. The locking inclined surface 803 and the limiting inclined surface 102 are used to limit the direction of the force component of the limiting part 101. In the direction from the outside to the inside of the spindle 8, the height of each point on the limiting inclined surface 102 and the locking inclined surface 803 gradually decreases, so that when the spindle 8 transmits the pulling force to the easy-to-remove part 10, the probability of the limiting part 101 being deformed by the tensile force and disengaging from the receiving groove 801 is reduced, thereby enhancing the stability of the connection between the spindle 8 and the easy-to-remove part 10.
[0035] See Figure 6 A guide slope 804 is provided in the receiving groove 801. The vertical part 901 is located between the adjacent guide slope 804 and the adjacent limiting part 101. The guide slope 804 is used to limit the direction of the component force of the vertical part 901 when it is squeezed, so as to attach Figure 6 Taking the guide slope 804 on the front side as an example, the guide slope 804 gradually tilts to the left in the direction from front to back. During the process of the spindle 8 transmitting the pulling force to the easy-to-remove part 10, when the easy-to-remove part 10 has a tendency to rotate relative to the spindle 8, the vertical part 901 can be used to restrict the rotation of the easy-to-remove part 10 relative to the spindle 8. In this process, when the vertical part 901 is subjected to the compressive force, the guide slope 804 provides the support force for the vertical part 901, and this support force has a component force toward the inside of the spindle 8, thus improving the stability of the spindle 8, the support part 9 and the easy-to-remove part 10.
[0036] When removing the removable part 10, first move the two connecting parts 903 away from each other, swing the vertical part 901 and move it out of the adjacent receiving groove 801, then move the two abutting parts 902 away from each other, so that the support member 9 can be removed from the spindle 8; keep the spindle 8 stationary and rotate the removable part 10 so that the limiting inclined surface 102 loses contact with the locking inclined surface 803, releasing the spindle 8 from limiting the removable part 10, then pull the removable part 10 downward so that the limiting inclined surface 102 slides out of the receiving groove 801, thus removing the removable part 10; the steps for installing a new removable part 10 are the reverse of the above steps. Example 3
[0037] This embodiment is a further optimization based on embodiment 2.
[0038] See Figure 3 and Figure 4 A flexible cylinder 11 is fitted on the lower part of the spindle 8. The flexible cylinder 11 is used to block the flow of adhesive. The outer side of the flexible cylinder 11 is bonded to the support member 9, so that when the support member 9 moves relative to the spindle 8, it can drive the flexible cylinder 11 to move together relative to the spindle 8.
[0039] The above configuration enables the flexible cylinder 11, the easy-to-disassemble part 10, and the substrate to form a chamber for containing the adhesive. As the spindle 8 moves closer to the substrate, the adhesive fully fills the chamber. This reduces the probability of low adhesion between the easy-to-disassemble part 10 and the substrate due to insufficient adhesive filling (if the adhesion is low, it is easy to break at the adhesive during pulling, leading to test failure). It also keeps the adhesive between the easy-to-disassemble part 10 and the substrate, reducing the probability of the adhesive flowing out between the easy-to-disassemble part 10 and the substrate due to gravity while waiting for the adhesive to solidify, thereby maintaining the adhesion strength between the easy-to-disassemble part 10 and the substrate. Example 4
[0040] This embodiment is a further optimization based on embodiment 3.
[0041] In existing adhesion testing techniques, when a reaction frame applies a pulling force to the spindle, the contact between the reaction frame and the substrate is required to provide a force point for the spindle's movement. However, when testing pipe-like substrates, since the pipe has an arc surface while the bottom surface of the reaction frame is flat, the reaction frame can only achieve line contact with the substrate. This causes stress concentration at the contact point between the reaction frame and the substrate during the spindle pulling process. For substrates with low strength or elastic materials, stress concentration can lead to deformation at the contact point between the substrate and the reaction frame, thereby damaging the coating on the substrate surface and affecting the adhesion test results.
[0042] See Figure 3 , Figure 4 , Figure 7and Figure 8 The lower part of the reaction frame 1 is provided with a receiving annular groove 121. The reaction frame 1 is fixedly connected to an annular liquid bladder 12 and a limiting ring 14. An elastic ring 13 is fixedly connected to the lower side of the annular liquid bladder 12. The annular liquid bladder 12, the elastic ring 13 and the limiting ring 14 are placed in the receiving annular groove 121 from top to bottom. The limiting ring 14 is slidably connected to annularly distributed abutment posts 15. The abutment posts 15 are fixedly connected to the elastic ring 13. The elastic ring 13 is used to disperse the local stress when the abutment posts 15 squeeze the annular liquid bladder 12.
[0043] The above configuration enables the movement of all the circumferential abutment columns 15 to be integrated through the annular liquid bladder 12, so that all the abutment columns 15 can abut against the substrate. Thus, when testing pipe-type substrates, the abutment columns 15 can provide multi-point circumferential support for the reaction frame 1, thereby reducing the probability of substrate deformation caused by local stress concentration and improving the accuracy of coating adhesion test results.
[0044] See Figure 7 and Figure 8 A connecting post 16 is slidably connected to the lower part of the abutment post 15. An elastic washer 17 is fixed between the connecting post 16 and the abutment post 15. The elastic coefficient of the elastic washer 17 is greater than that of the elastic ring 13, causing the elastic ring 13 to deform first under the compression of the abutment post 15. After all the connecting posts 16 are in contact with the base, as the reaction frame 1 continues to move downward and is compressed by the annular liquid bladder 12 and the elastic ring 13, the elastic washer 17 deforms, causing the abutment post 15 to move downward relative to the adjacent connecting post 16. The upper and lower sides of 17 are fixedly connected to the abutment post 15 and the connecting post 16 respectively. The elastic washer 17 is used to connect the abutment post 15 and the connecting post 16, and the elasticity of the elastic washer 17 provides space for relative movement between the abutment post 15 and the connecting post 16. The connecting post 16 is fixedly connected to the abutment member 18 that abuts against the adjacent abutment post 15. The limiting ring 14 is fixedly connected to two elastic strips 19 near the abutment member 18. The elastic strips 19 are made of elastic rubber. The abutment member 18 limits the adjacent abutment post 15 by embedding into the adjacent elastic strips 19.
[0045] The above setup enables the determination of the contact state between the connecting post 16 and the substrate by the deformation of the elastic washer 17. After all the connecting posts 16 are in contact with the substrate, the pull-out force provides a reaction force to the reaction frame 1, causing the abutment post 15 and the connecting post 16 to move relative to each other. This causes the abutment member 18 to deform and embed into the elastic strip 19, locking the position of the abutment post 15. In this way, during the application of the pull-out force, the probability of the reaction frame 1 shifting due to uneven deformation of adhesive, coating, etc. is reduced, thus reducing the probability of lateral force and improving the reliability of the test results. Example 5
[0046] This embodiment is a further optimization based on embodiment 4.
[0047] See Figure 3 and Figure 4 A pad 20 is fixed to the lower end of the connecting post 16, and a connector 21 is slidably connected to two adjacent connecting posts 16 for mutual limiting. The pad 20 is made of elastic rubber, which serves to increase the contact area with the substrate and to limit the adjacent connector 21 to prevent it from detaching from the connecting post 16. The connector 21 is used to enhance the strength of the connecting post 16 and to share the horizontal force generated by the connecting post 16 being guided by the side of the substrate.
[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.
Claims
1. A performance testing device for inorganic coatings, comprising: A reaction frame (1) is provided with a reset rod (2) which is sealed and slidably connected inside the reaction frame (1). The reset rod (2) is fixedly connected to a piston (3) which is sealed and slidably connected to the reaction frame (1). The reset rod (2) is threadedly connected to a puller (4). The puller (4) is provided with annularly distributed through holes. A steel ball (5) is placed in each of the through holes of the puller (4). The reaction frame (1) is slidably connected to a limit cylinder (6). The limit cylinder (6) is used to limit the steel ball (5). An elastic element (7) is fixedly connected between the limit cylinder (6) and the puller (4). The puller (4) is provided with a spindle (8). The puller (4) limits the spindle (8) through the steel ball (5). The spindle (8) is provided with a support (9). The position of the spindle (8) is determined by the support (9) abutting against the four points of the position to be measured.
2. The performance testing device for inorganic coatings according to claim 1, characterized in that: The spindle (8) is provided with four receiving grooves (801), and the support member (9) is composed of four vertical parts (901), two abutting parts (902) and two connecting parts (903). The receiving grooves (801) are used to accommodate the corresponding vertical parts (901) so that the vertical parts (901) can slide along the receiving grooves (801).
3. The performance testing device for inorganic coatings according to claim 2, characterized in that: The spindle (8) is provided with a frustum (802), and both of the abutting portions (902) are in contact with the frustum (802).
4. The performance testing device for inorganic coatings according to claim 3, characterized in that: The spindle (8) is provided with a removable part (10) near the support member (9). The removable part (10) is provided with four limiting parts (101). The receiving groove (801) limits the removable part (10) through the limiting parts (101).
5. The performance testing device for inorganic coatings according to claim 4, characterized in that: The limiting part (101) is provided with a limiting inclined surface (102), and the spindle (8) is provided with a locking inclined surface (803) that contacts the limiting inclined surface (102). The locking inclined surface (803) and the limiting inclined surface (102) are used to limit the direction of the force component of the limiting part (101).
6. The performance testing device for inorganic coatings according to claim 5, characterized in that: The receiving groove (801) is provided with a guide slope (804), and the vertical part (901) is located between the adjacent guide slope (804) and the adjacent limiting part (101). The guide slope (804) is used to limit the direction of the component force of the vertical part (901) when it is squeezed.
7. The performance testing device for inorganic coatings according to claim 5, characterized in that: The spindle (8) is fitted with a flexible cylinder (11) near the disassembly part (10), and the flexible cylinder (11) is used to block the flow of adhesive liquid.
8. The performance testing device for inorganic coatings according to claim 7, characterized in that: The reaction frame (1) is provided with a receiving annular groove (121) on the side near the spindle (8). The reaction frame (1) is fixedly connected to an annular liquid bladder (12) and a limiting ring (14). An elastic ring (13) is fixedly connected to the side of the annular liquid bladder (12) near the limiting ring (14). The annular liquid bladder (12), the elastic ring (13) and the limiting ring (14) are placed in the receiving annular groove (121) in sequence. The limiting ring (14) is slidably connected to annularly distributed abutment posts (15). The abutment posts (15) are fixedly connected to the elastic ring (13).
9. The performance testing device for inorganic coatings according to claim 8, characterized in that: The abutment post (15) is slidably connected to a connecting post (16), and an elastic washer (17) is fixed between the connecting post (16) and the abutment post (15). The connecting post (16) is fixedly connected to an abutment member (18) that abuts against the adjacent abutment post (15). The limiting ring (14) is fixedly connected to two elastic strips (19) near the abutment member (18). The abutment member (18) limits the adjacent abutment post (15) by embedding itself into the adjacent elastic strip (19).
10. The performance testing device for inorganic coatings according to claim 9, characterized in that: The lower end of the connecting column (16) is fixedly connected to a pad (20), and two adjacent connecting columns (16) are connected together by a connector (21) for limiting sliding.