Device and method for testing adhesive force between metal coating and organic coating

Abstract

The invention discloses a device and a method for testing adhesive force between a metal coating and an organic coating, wherein the device comprises a base and a power-on indicating device, wherein an X-direction sliding rail is arranged on the base, and an X-direction sliding base capable of sliding along the X-direction sliding rail is arranged on the X-direction sliding rail; a Y-direction sliding rail is further arranged on the base, a Y-direction sliding base capable of sliding along the Y-direction sliding rail is arranged on the Y-direction sliding rail, a supporting main beam hinged with the middle part of the Y-direction sliding base is arranged on the Y-direction sliding base, a scribing tool rest is arranged at one end of the supporting main beam, and a balance weight fine adjustment wheel is arranged at the other end of the supporting main beam; the top of the scribing knife rest is provided with a balance weight disc, the bottom of the scribing knife rest is provided witha scribing knife used for scribing a to-be-tested sample block, and two electrodes of the power-on indicating device are respectively connected with the to-be-tested sample block and the scribing knife rest. According to the device of the invention, through an indication principle of the power-on indicating device, the purpose that the balance weight of the scribing knife only cuts a surface coating layer without damaging the metal coating is realized, so that the adhesive force between the metal coating and the organic coating is accurately measured.

Description

technical field [0001] The invention belongs to the technical field of metal parts, and in particular relates to a device and a method for testing the adhesion between a metal coating and an organic coating. Background technique [0002] With the continuous improvement of the market's requirements for the anti-corrosion performance and appearance quality of metal parts of automobiles, more and more applications are combined with metal coatings and organic coatings. Coating a layer of organic top coatings on the metal coatings can not only The anti-corrosion performance has been greatly enhanced, and the matching degree of the appearance with the whole vehicle has also been improved. For such a composite surface treatment, the adhesion between the metal coating and the organic topcoat is an important performance indicator. [0003] At present, the main method for testing the adhesion of organic coatings in the industry is to use a hand-held grid knife or an electric grid mac...

AI Technical Summary

Problems solved by technology

For the interlayer adhesion test between the metal coating and the organic top coating, only the organic top coating should be scratched, and the metal coating below cannot be scratched. Break the surface coating without scratching the underlying metal coating, so the test results have large errors and cannot accurately reflect the interlayer adhesion

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