CN113514390B - Method for testing adhesive force of automobile plate electrophoresis paint film - Google Patents
Method for testing adhesive force of automobile plate electrophoresis paint film Download PDFInfo
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- CN113514390B CN113514390B CN202110262054.5A CN202110262054A CN113514390B CN 113514390 B CN113514390 B CN 113514390B CN 202110262054 A CN202110262054 A CN 202110262054A CN 113514390 B CN113514390 B CN 113514390B
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Abstract
The invention particularly relates to a method for testing adhesive force of an automobile plate electrophoresis paint film, which belongs to the technical field of paint surface testing, and comprises the following steps: obtaining a plate to be detected, wherein the plate to be detected is a metal plate covered with an electrophoresis paint film; immersing a plate to be measured in boiling solution, immersing in an ice-water mixture, taking out and drying to obtain a sample to be measured; carrying out adhesive force test on a sample to be tested to obtain a test result; the boiling solution-ice water alternate soaking is adopted to accelerate the coating failure, and the traditional hundred-cell test is combined to measure the adhesive force of the electrophoretic paint film of the automobile panel, so that the defects of poor differentiation degree, low upper limit of adhesive force detection and the like of the traditional hundred-cell test are avoided, the method is simple, the repeatability is good, and the measurement accuracy is high.
Description
Technical Field
The invention belongs to the technical field of paint surface testing, and particularly relates to a method for testing adhesive force of an electrophoretic paint film of an automobile panel.
Background
The automotive industry suffers from significant losses due to corrosion each year. How to improve the corrosion resistance of automobile products has become one of the important problems facing domestic and foreign enterprises. At present, pretreatment and cathode electrophoresis are main means for improving the corrosion resistance of a vehicle body, and a coating system on the surface of the vehicle body is one of main means for improving the corrosion resistance of an automobile product and prolonging the service life. As a result, the automotive industry has increasingly paid attention to the coating of automotive products, especially automotive bodies, as one of the core technologies in the automotive industry. Typical automotive body coating systems consist of a layer of electrocoat primer, basecoat, colorcoat and clearcoat. In order to ensure good decorative effect and corrosion resistance of the automobile coating, phosphating treatment is required to be carried out on the white automobile body before electrophoresis, and a phosphating film is formed between the coated substrate and the coating so as to improve the binding force and the overall coating performance between the coated substrate and the coating.
The adhesive force between the electrophoretic paint film and the automobile plate is a main influencing factor of the anti-corrosion performance of the automobile, and the traditional method is to measure the adhesive force of the paint film by adopting a hundred-cell dividing method at present, and the method is simple to operate, but the applicant finds that in the invention process: along with continuous optimization of pretreatment process and electrophoresis process, the adhesive force between the electrophoresis paint film and the automobile plate is beyond the detection range of the conventional hundred-grid method, so that the adhesive force of the paint film tested by the hundred-grid method is 0 level (the phenomenon that the cutting edge is completely smooth and no grid falls off) and the differentiation degree is poor.
Disclosure of Invention
The present invention has been made in view of the above problems, and has as its object to provide a method for testing the adhesion of an automotive on-board paint film which overcomes or at least partially solves the above problems.
The embodiment of the invention provides a method for testing the adhesive force of an automobile plate electrophoresis paint film, which comprises the following steps:
obtaining a plate to be detected, wherein the plate to be detected is a metal plate covered with an electrophoresis paint film;
immersing the plate to be measured into boiling solution, immersing into ice-water mixture, taking out and drying to obtain a sample to be measured;
and carrying out adhesive force test on the sample to be tested to obtain a test result.
Optionally, the board to be tested is immersed in boiling solution for 8-24 h.
Optionally, the boiling solution comprises alkali liquor and NaCl, wherein the concentration of the NaCl is 1% -10%, and the concentration of the alkali liquor is 1% -10%; the alkali liquor comprises NaOH and NaCO 3 At least one of them.
Optionally, the immersion time is 0.5h-2h in the ice-water mixture.
Optionally, the ice-water mixture is deionized water.
Optionally, the side edge of the board to be tested is provided with a sealing edge.
Optionally, the metal plate of the plate to be tested is one of a continuous annealing plate, a hot galvanized plate, an alloying hot galvanized plate, an electro galvanized plate or a zinc-aluminum-magnesium plating plate.
Optionally, the testing the sample to be tested specifically includes:
cutting the electrophoresis paint film of the sample to be tested to obtain a grid pattern area;
and (5) tightly attaching the adhesive tape to the grid pattern area for adhesion test to obtain a test result.
Optionally, the grid line spacing of the grid pattern area is 0.99mm-1.01mm.
Optionally, in the adhesion test of the adhesive tape tightly attached to the grid pattern area, the adhesive tape occupies 9N/25mm-11N/25mm, and the adhesion time of the adhesive tape is 10min-20min.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the method for testing the adhesive force of the automobile plate electrophoresis paint film provided by the embodiment of the invention comprises the following steps: obtaining a plate to be detected, wherein the plate to be detected is a metal plate covered with an electrophoresis paint film; immersing the plate to be measured into boiling solution, immersing into ice-water mixture, taking out and drying to obtain a sample to be measured; carrying out adhesive force test on the sample to be tested to obtain a test result; the boiling solution-ice water alternate soaking is adopted to accelerate the coating failure, and the traditional hundred-cell test is combined to measure the adhesive force of the electrophoretic paint film of the automobile panel, so that the defects of poor differentiation degree, low upper limit of adhesive force detection and the like of the traditional hundred-cell test are avoided, the method is simple, the repeatability is good, and the measurement accuracy is high.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a test method provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of measurement of a board to be measured according to an embodiment of the present invention;
in the figure: 1, an adhesive tape edge sealing area, 2-a board to be tested and 3-a grid pattern area;
Detailed Description
The advantages and various effects of the present invention will be more clearly apparent from the following detailed description and examples. It will be understood by those skilled in the art that these specific embodiments and examples are intended to illustrate the invention, not to limit the invention.
Throughout the specification, unless specifically indicated otherwise, the terms used herein should be understood as meaning as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification will control.
Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or may be prepared by existing methods.
The adhesive force between the electrophoretic paint film and the automobile plate is a main influencing factor of the anti-corrosion performance of the automobile, and the traditional method is to measure the adhesive force of the paint film by adopting a hundred-cell dividing method at present, and the method is simple to operate, but the applicant finds that in the invention process: along with the continuous optimization of the pretreatment process and the electrophoresis process, the adhesive force between an electrophoresis paint film and an automobile plate at present exceeds the detection range of a conventional hundred-cell method, so that the adhesive force of the paint film tested by the hundred-cell method is 0 level (the phenomenon that the cutting edge is completely smooth and no cell falls off is shown), and the differentiation is poor; for this reason, the embodiment of the application provides a method for testing the adhesive force of an automobile plate electrophoresis paint film.
According to an exemplary embodiment of the present invention, there is provided a method for testing adhesion of an automotive sheet electrophoretic paint film, the method comprising:
s1, obtaining a plate to be detected, wherein the plate to be detected is a metal plate covered with an electrophoretic paint film, in other words, the plate to be detected is a metal plate, a pretreatment film and an electrophoretic paint film coating system; in the embodiment, the length of the plate to be measured is 100mm-200mm, and the width is 50mm-120mm; optionally, the metal plate of the plate to be tested is one of common automobile metal substrates such as continuous annealing plate, hot galvanized plate, alloyed hot galvanized plate, electro-galvanized plate or zinc-aluminum-magnesium plating plate
S2, immersing the plate to be measured into boiling solution, immersing into ice-water mixture, taking out and drying to obtain a sample to be measured;
s3, carrying out adhesive force test on the sample to be tested to obtain a test result;
s3.1, cutting an electrophoresis paint film of a sample to be tested to obtain a grid pattern area; in this embodiment, the method specifically includes: forming a group of parallel cutting lines on the electrophoresis board by using a hundred-grid knife, scribing all the cutting lines to the metal board substrate, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel cutting lines to form a grid pattern; as the thickness of the electrophoretic paint film is usually 15-30 μm, the spacing between the edges of the selected hundred knives is 1mm (+0.01 mm). Slightly sweeping the residual paint film at the grid pattern by adopting a soft brush;
s3.2, tightly attaching the adhesive tape to the grid pattern area for adhesion test to obtain a test result; the samples were carefully inspected for the peeling of the coating in the cross-cut area and the adhesion of the paint film to the surface to be inspected was rated, the rating criteria being set forth in accordance with the rules of the cross-cut test for paint and varnish films of GB/T9286-1998.
As an alternative embodiment, the board to be tested is immersed in a boiling solution at a temperature of 100 ℃ for 8-24 hours, specifically, the boiling solution comprises NaOH and NaCl, wherein the concentration of the NaCl is 1% -10% and the concentration of the NaOH is 1% -10%.
The reason for the solution being boiling is that the paint film absorbs water and swells, and the paint film is accelerated to deteriorate; the reason for the immersion time of 8h-24h is determined by the failure degree of the combined paint film in boiling water, and the adverse effect of the too small time value is that the coating degradation is not obvious, the subsequent measurement result is not distinguished obviously, and the adverse effect of the too large time value is that the coating degradation is serious and is unfavorable for the subsequent measurement.
The NaCl environment has stronger paint film penetrability, the concentration of NaCl is 1% -10% because of the optimal coating degradation process, the adverse effect of too small concentration value is that the paint film is slower in failure, and the adverse effect of too large concentration value is that the solute in the solution is seriously precipitated.
NaOH provides an alkaline environment, while alkaliThe sexual environment can accelerate dissolution failure of pretreatment film, and the substances capable of replacing NaOH comprise NaCO 3 The reason why the concentration of NaOH is 1% -10% is to obtain the optimal coating degradation process, and an excessively large concentration adversely affects the coating failure to a relatively high extent and an excessively small concentration adversely affects the coating failure to a relatively low extent.
As an alternative embodiment, the sample is immersed in an ice-water mixture for 0.5-2 h, specifically, the ice-water mixture is deionized water, after the required time is reached, the sample is taken out, the surface is wiped dry, the water is left on the surface, and the sample is left for 24h in a dryer.
The reason for immersing in the ice water mixture is: because the thermal expansion coefficients of the electrophoresis paint film and the automobile plate are greatly different, certain thermal stress can be generated between the electrophoresis paint film and the automobile plate after the electrophoresis paint film passes through a high-low temperature alternating environment, the paint film adhesive force can be further deteriorated, the immersion time is 0.5h-2h, the adverse effect of the overlarge time value is that the test period is longer, and the adverse effect of the overlarge time value is that the coating layer is completely cooled. In the drying process, a small amount of water absorbed by the paint film in a swelling manner during the soaking process can volatilize, the external conditions of the dry-wet circulation can cause the expansion-contraction of the electrophoretic paint film and form internal stress, the adhesive force of the paint film can be deteriorated to a certain extent, the reason for the drying time of 24 hours is to fully volatilize the water in the coating, the adverse effect of the excessive time value is inconvenient for operators in time, the time is wasted, and the adverse effect of the insufficient volatilization of the water is caused.
As an alternative implementation mode, the side edge of the board to be tested is provided with an edge sealing, and specifically, the four sides of the board to be tested are sealed by adopting a high-temperature-resistant adhesive tape.
The purpose of banding is in order to protect the thinner car board incision of electrophoresis paint film and takes place the paint film and break in boiling solution boiling in-process, initiates the corruption, and then avoids influencing the accuracy of test.
As an alternative implementation mode, the adhesive tape is tightly attached to the grid pattern area for adhesion test, the adhesive tape occupies 9N/25mm-11N/25mm, and the adhesive time of the adhesive tape is 10min-20min. The adhesive force of the adhesive tape is (10+/-1) N/25mm, so as to ensure uniform and controllable adhesive force.
The method for testing the adhesion of the automotive sheet paint film of the present application will be described in detail with reference to examples, comparative examples and experimental data.
Example 1
The board to be measured: DC04 (200 mm x 100 mm) +pacarbophos+ppg cathodic electrophoresis;
s1, sealing four sides of a board to be tested by adopting a novel Hongshen brand golden finger high-temperature resistant adhesive tape, sealing edges, keeping a distance of 5mm from the edges, immersing the board to be tested in boiling solution for boiling for 8 hours, taking out a sample after the solution is 2% (wt) NaOH+2% (wt) NaCl and reaching the required time, immediately immersing the sample in an ice water mixture for 1 hour, taking out the sample after the required time is reached, wiping off residual water on the surface, and standing for 24 hours in a dryer.
S2, forming a group of parallel cutting lines on the board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, scribing all the cutting lines to the metal board substrate, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S3, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After the adhesive tape was attached for 10 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Example 2
The board to be measured: DP980 (200 mm x 100 mm) +paclcarbafos+ppg cathodic electrophoresis;
s1, sealing four sides of a board to be tested by adopting a novel Hongshen brand golden finger high-temperature resistant adhesive tape, sealing edges, keeping a distance of 5mm from the edges, immersing the board to be tested in boiling solution for boiling for 8 hours, taking out a sample after the solution is 2% (wt) NaOH+2% (wt) NaCl and reaching the required time, immediately immersing the sample in an ice water mixture for 1 hour, taking out the sample after the required time is reached, wiping off residual water on the surface, and standing for 24 hours in a dryer.
S2, forming a group of parallel cutting lines on the board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, scribing all the cutting lines to the metal board substrate, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S3, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After the adhesive tape was attached for 10 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Example 3
The board to be measured: DC04 (200 mm x 100 mm) +hawk film+basf cathode electrophoresis;
s1, sealing four sides of a board to be tested by adopting a novel Hongshen brand golden finger high-temperature resistant adhesive tape, sealing edges, keeping a distance of 5mm from the edges, immersing the board to be tested in boiling solution for boiling for 16 hours, taking out a sample after the solution reaches the required time, immediately immersing the sample in an ice-water mixture for 1 hour, taking out the sample after the required time is reached, wiping off residual water on the surface, and standing for 24 hours in a dryer.
S2, forming a group of parallel cutting lines on the board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, scribing all the cutting lines to the metal board substrate, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S3, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After attaching the adhesive tape for 20 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Example 4
The board to be measured: DX54d+zf (200 mm x 100 mm) +hawk thin film+basf cathode electrophoresis;
s1, sealing four sides of a board to be tested by adopting a novel Hongshen brand golden finger high-temperature resistant adhesive tape, sealing edges, keeping a distance of 5mm from the edges, immersing the board to be tested in boiling solution for boiling for 16 hours, taking out a sample after the solution reaches the required time, immediately immersing the sample in an ice-water mixture for 1 hour, taking out the sample after the required time is reached, wiping off residual water on the surface, and standing for 24 hours in a dryer.
S2, forming a group of parallel cutting lines on the board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, scribing all the cutting lines to the metal board substrate, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S3, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After attaching the adhesive tape for 20 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Comparative example 1
The board to be measured: DC04 (200 mm x 100 mm) +pacarbophos+ppg cathodic electrophoresis;
s1, forming a group of parallel cutting lines on a board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, wherein all the cutting lines are cut through to a metal board substrate, repeating the operation, and cutting a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S2, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After the adhesive tape was attached for 10 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Comparative example 2
The board to be measured: DP980 (200 mm x 100 mm) +paclcarbafos+ppg cathodic electrophoresis;
s1, forming a group of parallel cutting lines on a board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, wherein all the cutting lines are cut through to a metal board substrate, repeating the operation, and cutting a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S2, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After the adhesive tape was attached for 10 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Comparative example 3
The board to be measured: DC04 (200 mm x 100 mm) +hawk film+basf cathode electrophoresis;
s1, forming a group of parallel cutting lines on a board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, wherein all the cutting lines are cut through to a metal board substrate, repeating the operation, and cutting a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S2, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After attaching the adhesive tape for 20 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
Comparative example 4
The board to be measured: DX54d+zf (200 mm x 100 mm) +hawk thin film+basf cathode electrophoresis;
s1, forming a group of parallel cutting lines on a board to be tested by adopting a QFH-A (quad flat no-lead) hundred grid cutters, scribing all the cutting lines to the metal matrix, repeating the operation, and scribing a group of intersecting parallel lines in the direction forming an angle of 90 degrees with the original group of parallel lines to form a grid pattern.
S2, placing the center point of the adhesive tape for test above the grid, enabling the direction of the center point to be parallel to one group of cutting lines, and then flattening the adhesive tape above the grid area by using fingers. In order to ensure that the adhesive tape is well contacted with the coating, the adhesive tape is gently rubbed by a card, so that the adhesive tape is tightly attached to the surface of the electrophoretic paint film. After attaching the adhesive tape for 20 minutes, the sample was fixed with one hand and one end of the adhesive tape was held by the other hand, and the adhesive tape was peeled off smoothly within 1.0s at an angle as close to 60 ° as possible, to obtain a test result.
The test results of examples 1 to 4 and comparative examples 1 to 4 are shown in the following table.
| Paint film adhesion rating | |
| Example 1 | |
| Example 2 | |
| Example 3 | 3 grade |
| Example 4 | |
| Comparative example 1 | Level 0 |
| Comparative example 2 | Level 0 |
| Comparative example 3 | Level 0 |
| Comparative example 4 | Level 0 |
From the data in examples 1-4, it can be seen that: the test method provided by the embodiment of the invention is used for testing the board to be tested, and has obvious distinction degree. The data from the examples and comparative examples show that: the testing method provided by the embodiment of the invention obviously improves the upper limit of the adhesive force detection, can be suitable for testing the current electrophoresis paint film automobile plate, has good differentiation and high testing precision.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
in the embodiment of the invention, the boiling solution-ice water alternate soaking is adopted to accelerate the failure of the coating, the traditional hundred-grid test is combined to measure the adhesive force of the electrophoretic paint film of the automobile panel, the defects of poor differentiation degree, low upper limit of adhesive force detection and the like of the traditional hundred-grid test are avoided, and the method is simple, good in repeatability and high in measurement precision.
Finally, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. An automobile plate electrophoresis paint film adhesion test method is characterized by comprising the following steps:
obtaining a plate to be detected, wherein the plate to be detected is a metal plate, a pretreatment film and an electrophoresis paint film coating system;
immersing the plate to be measured in boiling solution for 8-24 h, immersing in ice-water mixture for 0.5-2 h, taking out and drying to obtain a sample to be measured;
carrying out adhesive force test on the sample to be tested to obtain a test result;
the boiling solution comprises alkali liquor and NaCl, wherein the concentration of the NaCl is 1-10%, and the concentration of the alkali liquor is 1-10%; the alkali liquor is NaOH;
the metal plate of the plate to be tested is one of a continuous annealing plate, a hot galvanized plate, an alloying hot galvanized plate, an electro-galvanized plate or a zinc-aluminum-magnesium plating plate.
2. The method for testing the adhesion of an automotive sheet electrophoretic paint film according to claim 1, wherein the ice-water mixture is deionized water.
3. The method for testing the adhesion of an electrophoretic paint film on an automobile panel according to claim 1, wherein the side edge of the panel to be tested is provided with a sealing edge.
4. The method for testing the adhesion of an automotive sheet electrophoretic paint film according to claim 1, wherein the step of testing the adhesion of the test specimen comprises:
cutting the electrophoresis paint film of the sample to be tested to obtain a grid pattern area;
and (5) tightly attaching the adhesive tape to the grid pattern area for adhesion test to obtain a test result.
5. The method for testing the adhesion of an automotive sheet electrophoretic paint film according to claim 4, wherein the grid line pitch of the grid pattern area is 0.99mm to 1.01mm.
6. The method for testing the adhesive force of the electrophoretic paint film of the automobile panel according to claim 4, wherein in the adhesive force test, the adhesive tape is attached to the grid pattern area, the adhesive force is 9N/25mm-11N/25mm, and the adhesive time of the adhesive tape is 10min-20min.
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| MX2017000559A (en) * | 2014-07-17 | 2017-04-27 | Henkel Ag & Co Kgaa | Electroceramic coating for magnesium alloys. |
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| US5763191A (en) * | 1990-12-12 | 1998-06-09 | Boehringer Mannheim Gmbh | Universal binding film |
| CN101504403A (en) * | 2009-03-23 | 2009-08-12 | 西南铝业（集团）有限责任公司 | Detection of roller coat chromizing membrane evenness by water cooking method |
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