Device and method for measuring adhesive force of coating on surface of cylindrical base material

Abstract

The invention discloses a device and a method for measuring the adhesive force of a coating on the surface of a cylindrical base material. The device comprises a positioning ring, an annular cutting tool and a longitudinal cutting tool, and the positioning ring is connected with the annular cutting tool and the longitudinal cutting tool through two symmetrical and detachable connecting mechanisms; the circumferential cutting tool and the longitudinal cutting tool are used for testing the adhesive force of the surface coating of the cylindrical base material to be tested through a cross cutting method to obtain a cross cutting result of the surface coating of the cylindrical base material, and the cross cutting result is used for evaluating the adhesive force of the surface coating of the cylindrical base material.

Description

Technical Field

[0001] This invention relates to the field of semiconductive coating technology, and more specifically, to an adhesion measuring device and method for coatings applied to the surface of a cylindrical substrate. Background Technology

[0002] Coatings play a vital role in production and daily life, requiring coatings in numerous applications. Oil pipelines require coatings with high corrosion resistance, and voltage proportioning standard devices in DC power transmission projects require semi-conductive coatings to suppress resistive nonlinear effects. Currently, the production volume of coatings for pipeline substrates is substantial, and its market size continues to grow steadily due to the ongoing demands from global energy infrastructure, urban construction, and industrial development.

[0003] However, testing the adhesion of coatings on cylindrical substrates remains a challenge. Current standards only cover coating adhesion on planar substrates; there are no standards or testing equipment specifically for cylindrical substrates, making it difficult to determine adhesion. Poor adhesion leads to premature blistering and peeling, causing rapid corrosion of the metal substrate, thinning of pipe or tank walls, and increased risk of leakage. For oil or gas pipelines, this can result in leaks, resource waste, and in severe cases, explosions and fires causing casualties. For chemical pipelines, it can lead to leaks of toxic and harmful chemicals, polluting soil and groundwater, and threatening human health. For 1100kV voltage proportional standard devices, low adhesion causes coatings to easily detach, failing to effectively mitigate the nonlinear resistance of the external insulating bushing. The bushing's resistance will still decrease nonlinearly with increasing voltage, increasing measurement errors and triggering faults such as DC blockage and overload alarms. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device and method for measuring the adhesion of a coating applied to the surface of a cylindrical substrate.

[0005] According to one aspect of the present invention, an adhesion measuring device for coating on the surface of a cylindrical substrate is provided, comprising: a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool, wherein...

[0006] The positioning ring is connected to the circumferential cutting tool and the longitudinal cutting tool respectively through two symmetrical and detachable connecting mechanisms.

[0007] Circumferential and longitudinal cutting tools are used to perform cross-cut tests on the adhesion of the coating on the surface of the cylindrical substrate to be tested, and the cross-cut results of the coating on the surface of the cylindrical substrate are obtained. The cross-cut results are used to evaluate the adhesion of the coating on the surface of the cylindrical substrate.

[0008] Optionally, the connecting mechanism is a stud, which is connected by the threads that mate on the circumferential cutting tool and the longitudinal cutting tool.

[0009] Optionally, both the circumferential cutting tool and the longitudinal cutting tool are provided with a first preset number of guide blades and a second preset number of cutting blades.

[0010] Optionally, if the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a hard substrate, the spacing between the cutting edges is 1 mm; if the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a soft substrate, the spacing between the cutting edges is 2 mm; if the coating thickness on the surface of the cylindrical substrate is 61 μm to 120 μm and the substrate is a hard or soft substrate, the spacing between the cutting edges is 2 mm; if the coating thickness on the surface of the cylindrical substrate is 121 μm to 250 μm and the substrate is a hard or soft substrate, the spacing between the cutting edges is 3 mm.

[0011] Optionally, the guide blade and the cutting blade are on the same plane.

[0012] Optionally, the distance between the middle cutting edge of the circumferential or longitudinal cutting tool and the tool's central axis is equal to the outer radius of the coated cylindrical substrate.

[0013] Optionally, the circumferential cutting tool and the longitudinal cutting tool intersect at a 90° angle to form a grid pattern.

[0014] According to another aspect of the present invention, a method for measuring the adhesion of a coating applied to the surface of a cylindrical substrate is provided, comprising:

[0015] Align the stud of the positioning ring with the thread of the circumferential cutting tool and tighten it. Then rotate the device clockwise at a constant speed to make a second preset number of obvious circumferential scratches on the coating on the surface of the cylindrical substrate. Stop rotating and remove the circumferential cutting tool.

[0016] Align the stud of the positioning ring with the thread of the longitudinal cutting tool and tighten it. Then move the device at a constant speed from top to bottom to scratch the coating on the surface of the cylindrical substrate with a second preset number of obvious longitudinal scratches and stop moving. Remove the longitudinal cutting tool, wherein the circumferential scratches and the longitudinal scratches intersect at a 90° angle to form a grid pattern.

[0017] The coating powder generated during the cutting process was wiped away using cleaning tools, and the grid pattern cut out on the surface of the cylindrical substrate was adhered with transparent tape to obtain the coating peeled off on the tape.

[0018] The adhesion level of the coating on the surface of the cylindrical substrate is determined based on the coating condition and the preset grading standard.

[0019] Optionally, the grading criteria include:

[0020] Level 0: The cut edges are completely smooth, with no chips falling off;

[0021] Level 1: A small amount of coating peels off at the intersection of the cuts, but the area affected by the cross-cutting is not significantly greater than 5%;

[0022] Level 2: Coating peeling occurs at the intersection of cuts and / or along the edges of cuts, with the affected cross-cut area significantly greater than 5%, but not significantly greater than 15%.

[0023] Level 3: The coating is partially or completely peeled off in large fragments along the cut edge, and / or partially or completely peeled off in different grid locations, with the affected cross-cut area significantly greater than 15% but not significantly greater than 35%.

[0024] Level 4: The coating peels off in large fragments along the cut edge, and / or some squares are partially or completely detached, with the affected cross-cut area significantly greater than 35%, but not significantly greater than 65%.

[0025] Level 5: The degree of peeling exceeds Level 4.

[0026] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing the methods described in any of the above aspects of the present invention.

[0027] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: a processor; a memory for storing executable instructions of the processor; the processor being configured to read the executable instructions from the memory and execute the instructions to implement the method described in any of the preceding aspects of the present invention.

[0028] Therefore, the adhesion measuring device for coatings on the surface of a cylindrical substrate provided by this invention includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut test on the adhesion of the coating on the surface of the cylindrical substrate. This enables accurate determination of the adhesion of the coating on the surface of the cylindrical substrate. Attached Figure Description

[0029] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures: Figure 1 and Figure 2These are top and front views of a positioning ring structure provided in an exemplary embodiment of the present invention; Figure 3 and Figure 4 These are top and front views of a circumferential cutting tool of an exemplary embodiment of the present invention; Figure 5 and Figure 6 These are top and front views of a longitudinal cutting tool of an exemplary embodiment of the present invention; Figure 7 These are top and front views of a schematic diagram of the cutting edge and guide edge of a cutting tool provided in an exemplary embodiment of the present invention. Figure 8 This is a flowchart illustrating a method for measuring the adhesion of a coating on the surface of a cylindrical substrate, provided in an exemplary embodiment of the present invention. Figure 9 This is a schematic diagram of an adhesion test standard provided by an exemplary embodiment of the present invention. Detailed Implementation

[0035] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0036] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0037] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0038] It should also be understood that in the embodiments of the present invention, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0039] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more unless explicitly defined or given contrary instructions in the context.

[0040] Furthermore, the term "and / or" in this invention is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this invention generally indicates that the preceding and following related objects have an "or" relationship.

[0041] It should also be understood that the description of the various embodiments in this invention emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0042] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0043] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0044] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0046] Figure 1 This invention provides an exemplary embodiment of an adhesion measuring device for coatings applied to the surface of a cylindrical substrate, comprising: a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool, wherein...

[0047] The positioning ring is connected to the circumferential cutting tool and the longitudinal cutting tool respectively through two symmetrical and detachable connecting mechanisms.

[0048] Circumferential and longitudinal cutting tools are used to perform cross-cut tests on the adhesion of the coating on the surface of the cylindrical substrate to be tested, and the cross-cut results of the coating on the surface of the cylindrical substrate are obtained. The cross-cut results are used to evaluate the adhesion of the coating on the surface of the cylindrical substrate.

[0049] Optionally, the connecting mechanism is a stud, which is connected by the threads that mate on the circumferential cutting tool and the longitudinal cutting tool.

[0050] Optionally, both the circumferential cutting tool and the longitudinal cutting tool are provided with a first preset number of guide blades and a second preset number of cutting blades.

[0051] Optionally, if the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a hard substrate, the spacing between the cutting edges is 1 mm; if the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a soft substrate, the spacing between the cutting edges is 2 mm; if the coating thickness on the surface of the cylindrical substrate is 61 μm to 120 μm and the substrate is a hard or soft substrate, the spacing between the cutting edges is 2 mm; if the coating thickness on the surface of the cylindrical substrate is 121 μm to 250 μm and the substrate is a hard or soft substrate, the spacing between the cutting edges is 3 mm.

[0052] Optionally, the guide blade and the cutting blade are on the same plane.

[0053] Optionally, the distance between the middle cutting edge of the circumferential or longitudinal cutting tool and the tool's central axis is equal to the outer radius of the coated cylindrical substrate.

[0054] Optionally, the circumferential cutting tool and the longitudinal cutting tool intersect at a 90° angle to form a grid pattern.

[0055] Specifically, the purpose of this invention is to overcome the shortcomings of the prior art and solve the problem that the adhesion of cylindrical substrates cannot be tested. It proposes a device for testing the adhesion of coatings on the surface of cylindrical substrates. This device is based on the cross-cut method and can accurately measure the adhesion of coatings on the surface of cylindrical substrates.

[0056] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate.

[0057] Specifically, the positioning ring has two symmetrical, detachable studs, and the cutting tool also has threads that can cooperate with it to fix the cutting tool. The studs can also be used to move the positioning ring to assist the cutting tool in making grids.

[0058] Specifically, refer to Figure 1 and Figure 2 As shown, the positioning ring has two symmetrical, detachable studs that engage with the threads on the cutting tool to secure it. The studs can also be used to move the positioning ring, assisting the cutting tool in marking. The positioning ring can be fixed at the cutting position on the cylindrical coating and ensures consistent cutting force during the cutting process, reducing the demands on the operator.

[0059] Both circumferential and longitudinal cutting tools have two guide edges and six cutting edges. The spacing between the cutting edges depends on the coating thickness and the type of substrate. For coating thicknesses of 60 μm or less and hard substrates such as metals and plastics, the spacing is 1 mm; for coating thicknesses of 60 μm or less and soft substrates such as wood and plaster, the spacing is 2 mm; for coating thicknesses of 61 μm to 120 μm and hard or soft substrates, the spacing is 2 mm; for coating thicknesses of 121 μm to 250 μm and hard or soft substrates, the spacing is 3 mm. The guide edges and cutting edges should be on the same plane.

[0060] The distance between the cutting edge of a circumferential (longitudinal) cutting tool and the tool's central axis should be equal to the outer radius of the coated cylindrical substrate.

[0061] Specifically, refer to Figure 3 and Figure 4 As shown, the circumferential cutting tool has two guide edges and six cutting edges. The distance between the cutting edges of the circumferential cutting tool and the tool's central axis should be equal to the outer radius R of the coated cylindrical substrate. The circumferential cutting tool is installed on the positioning ring, the stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to create six distinct scratches on the coating surface of the cylindrical substrate before rotation is stopped. This operation method is simple and fast.

[0062] Specifically, refer to Figure 5 and Figure 6 As shown, the longitudinal cutting tool also has two guide blades and six cutting blades. The longitudinal cutting tool is installed on the positioning ring, the stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping. The operation method is simple, and its application to cylindrical coatings allows for accurate testing of their adhesion.

[0063] Specifically, refer to Figure 7 As shown, the cutting tools are divided into three specifications according to the spacing between the cutting edges. The first type is used for coating thickness of 60μm and below, with hard substrates such as metal and plastic, and the spacing between the cutting edges is 1mm. The second type is used for coating thickness of 60μm and below, with soft substrates such as wood and plaster, as well as hard or soft substrates with coating thickness of 61μm to 120μm, and the spacing between the cutting edges is 2mm. The third type is used for coating thickness of 121μm to 250μm, with hard or soft substrates, and the spacing between the cutting edges is 3mm.

[0064] This device is not suitable for coatings with a total thickness greater than 250 μm.

[0065] When using this device, first install the circumferential cutting tool on the positioning ring, align the stud of the positioning ring with the thread of the cutting tool and tighten it, so that the circumferential cutting tool and the positioning ring are stably matched. Then rotate the device clockwise at a constant speed to scratch six obvious scratches on the coating on the surface of the cylindrical substrate, then stop rotating and remove the circumferential cutting tool.

[0066] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0067] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0068] After the powder has been completely removed, use transparent tape to adhere the grid pattern cut by the cutting tool, then carefully peel it off. Observe the condition of the peeled coating on the tape and proceed accordingly. Figure 9 Assess the adhesion rating of the coating.

[0071] This invention provides an apparatus for testing the adhesion of coatings on the surface of cylindrical substrates, which has the following advantages compared to the prior art:

[0072] 1. To address the current inability to effectively test the adhesion of coatings applied to the surface of cylindrical substrates, this technical solution enables qualitative testing of the adhesion of cylindrical substrates. The adhesion level of the coating on the cylindrical substrate is obtained through a cross-cut test, and the magnitude of the adhesion of the coating on the cylindrical substrate is determined based on the adhesion level.

[0073] 2. This device is a ring-shaped device. A positioning ring secures the ring-shaped cutting tool or longitudinal cutting tool to the cylindrical sample. The positioning ring is as follows: Figure 1 As shown. The circumferential cutting tool, by rotating clockwise, creates six distinct scratches on the coating of the cylindrical substrate surface. The circumferential cutting tool, as shown... Figure 2 As shown, the cutting blade is as follows Figure 4 As shown. The longitudinal cutting tool, moving at a constant speed from top to bottom, scratches six distinct lines into the coating on the surface of the cylindrical substrate. The longitudinal cutting tool is as follows: Figure 3 As shown.

[0074] 3. This technical solution can be used for adhesion testing of coatings on cylindrical substrates. It is simple to operate and easy to use. It is suitable not only for the laboratory but also for construction sites under various conditions.

[0075] 4. The ring-shaped cutting tool and the longitudinal cutting tool of this technical solution can maintain the same stress on the coating during the cutting process, and the test results are not affected by human factors.

[0076] Example 1

[0077] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of an epoxy sleeve coating with a diameter of 22 mm and a length of 128 mm.

[0078] The epoxy resin sleeve is a rigid substrate with an outer surface coating thickness of 60μm. The spacing between the cutting blades is adjusted to 1mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six distinct marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0079] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0080] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0081] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0082] Example 2

[0083] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of an epoxy sleeve coating with a diameter of 22 mm and a length of 128 mm.

[0084] The epoxy resin sleeve is a rigid substrate with an outer surface coating thickness of 100μm. The spacing between the cutting blades is adjusted to 2mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six obvious marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0085] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0086] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0087] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0088] Example 3

[0089] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of an epoxy sleeve coating with a diameter of 22 mm and a length of 128 mm.

[0090] The epoxy resin sleeve is a rigid substrate with an outer surface coating thickness of 150μm. The spacing between the cutting blades is adjusted to 3mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six obvious marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0091] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0092] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0093] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0094] Example 4

[0095] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of a coating on the outer surface of a wooden cylindrical substrate with a diameter of 50 mm and a length of 200 mm.

[0096] The wooden cylindrical substrate is a soft base material with an outer surface coating thickness of 60μm. The spacing between the cutting blades is adjusted to 2mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six obvious marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0097] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0098] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0099] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0100] Example 5

[0101] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of a coating on the outer surface of a wooden cylindrical substrate with a diameter of 50 mm and a length of 200 mm.

[0102] The wooden cylindrical substrate is a soft base material with an outer surface coating thickness of 100μm. The spacing between the cutting blades is adjusted to 2mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six obvious marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0103] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0104] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0105] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0106] Example 6

[0107] An apparatus for testing the adhesion of a coating on the surface of a cylindrical substrate includes a positioning ring, a circumferential cutting tool, and a longitudinal cutting tool. The positioning ring is used to mount the circumferential and longitudinal cutting tools, which are used to perform a cross-cut adhesion test on the coating on the surface of the cylindrical substrate. This embodiment tests the adhesion of a coating on the outer surface of a wooden cylindrical substrate with a diameter of 50 mm and a length of 200 mm.

[0108] The wooden cylindrical substrate is a soft base material with an outer surface coating thickness of 150μm. The spacing between the cutting blades is adjusted to 3mm. The circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened to ensure a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to scratch six obvious marks on the coating of the cylindrical substrate surface. Rotation is then stopped, and the circumferential cutting tool is removed.

[0109] Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved at a constant speed from top to bottom, scratching six distinct lines on the coating surface of the cylindrical substrate before stopping and removing the longitudinal cutting tool. The scratches produced in this step should intersect the scratches produced in the previous step at a 90° angle to form a grid pattern.

[0110] Then, carefully wipe away the coating powder generated during the cutting process with a soft, clean brush to prevent the coating powder from affecting the test results.

[0111] After the powder is removed, use transparent tape to stick the grid pattern cut by the cutting tool, and carefully peel it off. Observe the condition of the peeled coating on the tape, and evaluate the adhesion level of the coating according to Table 1.

[0112] Comparative Example 1

[0113] The commonly used adhesion testing device is the cross-cut adhesion tester. This instrument is mainly suitable for determining the adhesion of organic coatings using the cross-cut adhesion test. Its working principle and operation method are as follows:

[0114] A cross-cutting tool is used to cut and penetrate the coating into a grid pattern using a tool of a certain size. The completed grid pattern is classified into six levels to evaluate the adhesion effect of the coating from the substrate.

[0115] Operating instructions:

[0116] Place the test piece on a sufficiently hard flat surface. Hold the scribing tool handle, keeping the multi-blade cutter perpendicular to the test piece's surface. Apply even pressure, use a steady, non-shaking motion, and cut at a speed of 20–50 mm / s. Rotate the test piece 90 degrees and repeat the above operation on the cut surfaces to create a grid pattern. Then, use a soft brush to gently brush the test piece along the diagonal sides of the grid pattern, moving backward 5 times and forward 5 times. Once the powder is removed, use transparent tape to adhere the grid pattern created by the cutter. Peel off the tape and observe the peeled coating. Evaluate the coating's adhesion level according to Table 1.

[0117] The device in Comparative Example 1 can only test planar coatings and cannot test cylindrical coatings; moreover, the testing process in Comparative Example 1 requires the operator to use uniform pressure, a stable and vibration-free operating method, and a certain cutting speed, which has high requirements.

[0118] Comparative Example 2

[0119] The commonly used pull-out adhesion tester uses a hydraulic system to detach a coating of a certain diameter from the surface of the substrate to measure the adhesion of the coating. The tester's multi-functional digital display shows the magnitude of the adhesion.

[0120] Operating instructions:

[0121] Polish the coating of the pre-bonded spindle with a polishing pad, then clean the spindle and the surface of the coating to be tested with a suitable solvent to remove oil and other contaminants, and wait for it to dry; open the two-component adhesive provided in the instrument, mix them in a 1:1 ratio, spread them thinly and evenly on the bottom of the drawn spindle, press the spindle firmly onto the prepared test surface, apply pressure to squeeze out the excess adhesive, then wipe the overflowing adhesive clean, and wait for the adhesive to fully cure before preparing to conduct the adhesion test;

[0122] Rotate the white protruding rotating plug on the right side of the instrument counterclockwise until it cannot be rotated further, while keeping the pressure handle pressed all the way down. In this state, press the pull ring on the retaining ring to the bottom, then pull the retaining ring onto the spindle and pull it slightly to ensure a tight fit. Press the power button on the instrument display to turn on the power. Select the size of the spindle to be pulled. The standard spindle size of the instrument is generally 20mm, so when you switch to size 20, you can select the unit for the instrument test, which is usually the strength value unit MPa. Then, zero the instrument and rotate the rotating plug on the right side clockwise to the bottom. Now you can slowly crank the handle, and the reading on the display will slowly rise. Gradually, to obtain a more accurate result, you must carefully control the speed of pressing down. When you hear a sound, the spindle has been pulled off the coating. The fixed reading on the display at this time is the adhesion of the coating.

[0123] Comparative Example 2 uses a pull-out method for adhesion testing. From an operational perspective, this device is relatively complex to operate; the method used in this embodiment is simpler. However, the testing method in Comparative Example 2 still cannot test cylindrical coatings.

[0124] According to another aspect of the invention, such as Figure 8 The diagram shows a flowchart illustrating a method for measuring the adhesion of a coating applied to the surface of a cylindrical substrate. (Refer to...) Figure 8 As shown, the adhesion measurement method 800 for coatings applied to the surface of a cylindrical substrate includes:

[0125] Step 801: Align the stud of the positioning ring with the thread of the circumferential cutting tool and tighten it. Then rotate the device clockwise at a constant speed to make a second preset number of obvious circumferential scratches on the coating on the surface of the cylindrical substrate. Stop rotating and remove the circumferential cutting tool.

[0126] Step 802: Align the stud of the positioning ring with the thread of the longitudinal cutting tool and tighten it. Then move the device at a constant speed from top to bottom to scratch the coating on the surface of the cylindrical substrate with a second preset number of obvious longitudinal scratches and stop moving. Remove the longitudinal cutting tool, wherein the circumferential scratches and the longitudinal scratches intersect at a 90° angle to form a grid pattern.

[0127] Step 803: Use a cleaning tool to wipe away the coating powder generated during the cutting process, and use transparent tape to stick the grid pattern cut out on the surface of the cylindrical substrate to obtain the coating peeled off on the tape;

[0128] Step 804: Determine the adhesion level of the coating on the surface of the cylindrical substrate according to the coating condition and the preset grading standard.

[0129] Specifically, first, the circumferential cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the circumferential cutting tool and the positioning ring. Then, the device is rotated clockwise at a uniform speed to create six distinct scratches on the coating surface of the cylindrical substrate. Rotation is then stopped, and the circumferential cutting tool is removed. Next, the longitudinal cutting tool is installed on the positioning ring. The stud of the positioning ring is aligned with the thread of the cutting tool and tightened, thus ensuring a stable fit between the longitudinal cutting tool and the positioning ring. Then, the device is moved from top to bottom at a uniform speed to create six distinct scratches on the coating surface of the cylindrical substrate. Movement is then stopped, and the longitudinal cutting tool is removed. The scratches created in this step should intersect the scratches created in the previous step at a 90° angle to form a grid pattern.

[0130] Optionally, the grading criteria include:

[0131] Level 0: The cut edges are completely smooth, with no chips falling off;

[0132] Level 1: A small amount of coating peels off at the intersection of the cuts, but the area affected by the cross-cutting is not significantly greater than 5%;

[0133] Level 2: Coating peeling occurs at the intersection of cuts and / or along the edges of cuts, with the affected cross-cut area significantly greater than 5%, but not significantly greater than 15%.

[0134] Level 3: The coating is partially or completely peeled off in large fragments along the cut edge, and / or partially or completely peeled off in different grid locations, with the affected cross-cut area significantly greater than 15% but not significantly greater than 35%.

[0135] Level 4: Large fragments of coating peel off along the cut edge, and / or some squares partially or completely peel off, with the affected cross-cut area significantly greater than 35% but not significantly greater than 65%; Level 5: The degree of peeling exceeds Level 4.

[0136] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A device for measuring the adhesion of a coating on the surface of a cylindrical substrate, characterized in that, include: Positioning ring, circumferential cutting tool and longitudinal cutting tool, among which The positioning ring is connected to the circumferential cutting tool and the longitudinal cutting tool respectively through two symmetrical and detachable connecting mechanisms. The circumferential cutting tool and the longitudinal cutting tool are used to perform a cross-cut test on the adhesion of the coating on the surface of the cylindrical substrate to be tested, and to obtain the cross-cut results of the coating on the surface of the cylindrical substrate, wherein the cross-cut results are used to evaluate the adhesion of the coating on the surface of the cylindrical substrate.

2. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 1, characterized in that, The connecting mechanism is a stud, which is connected by the threads that mate on the circumferential cutting tool and the longitudinal cutting tool.

3. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 1, characterized in that, Both the circumferential cutting tool and the longitudinal cutting tool are provided with a first preset number of guide blades and a second preset number of cutting blades.

4. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 3, characterized in that, If the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a hard substrate, the spacing between the cutting blades is 1 mm; if the coating thickness on the surface of the cylindrical substrate is 60 μm or less and the substrate is a soft substrate, the spacing between the cutting blades is 2 mm. If the coating thickness on the surface of the cylindrical substrate is 61μm to 120μm, and the substrate is a hard or soft substrate, then the spacing between the cutting blades is 2mm. If the coating thickness on the surface of the cylindrical substrate is 121μm to 250μm, and the substrate is a hard or soft substrate, then the spacing between the cutting blades is 3mm.

5. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 3, characterized in that, The guide blade and the cutting blade are on the same plane.

6. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 3, characterized in that, The distance between the middle cutting edge of the circumferential cutting tool or the longitudinal cutting tool and the tool's central axis is equal to the outer radius of the coated cylindrical substrate.

7. The adhesion measuring device for coatings on the surface of a cylindrical substrate according to claim 1, characterized in that, The scratches of the circumferential cutting tool and the longitudinal cutting tool intersect at a 90° angle, forming a grid pattern.

8. A method for measuring the adhesion of a coating on a cylindrical substrate surface using the adhesion measuring device described in any one of claims 1-7, characterized in that, include: Align the stud of the positioning ring with the thread of the circumferential cutting tool and tighten it. Then rotate the device clockwise at a constant speed to scratch the coating on the surface of the cylindrical substrate with a second preset number of obvious circumferential scratches, and then stop rotating and remove the circumferential cutting tool. Align the stud of the positioning ring with the thread of the longitudinal cutting tool and tighten it. Then move the device at a constant speed from top to bottom to scratch the coating on the surface of the cylindrical substrate with a second preset number of obvious longitudinal scratches and stop moving. Remove the longitudinal cutting tool, wherein the circumferential scratches intersect the longitudinal scratches at a 90° angle to form a grid pattern. The coating powder generated during the cutting process was wiped away using cleaning tools, and the grid pattern cut out on the surface of the cylindrical substrate was adhered with transparent tape to obtain the coating peeled off on the tape. The adhesion level of the coating on the surface of the cylindrical substrate is determined based on the coating condition and the preset grading standard.

9. The method according to claim 8, characterized in that, The grading criteria include: Level 0: The cut edges are completely smooth, with no chips falling off; Level 1: A small amount of coating peels off at the intersection of the cuts, but the area affected by the cross-cuts cannot be significantly greater than 5%; Level 2: Coating peeling occurs at the intersection of cuts and / or along the edges of cuts, with the affected cross-cut area significantly greater than 5%, but not significantly greater than 15%. Level 3: The coating is partially or completely peeled off in large fragments along the cut edge, and / or partially or completely peeled off in different grid locations, with the affected cross-cut area significantly greater than 15% but not significantly greater than 35%. Level 4: The coating peels off in large fragments along the cut edge, and / or some squares are partially or completely detached, with the affected cross-cut area significantly greater than 35%, but not significantly greater than 65%. Level 5: The degree of peeling exceeds Level 4.

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