L'adhérence du revêtement est la force de liaison entre le revêtement et la mesure du substrat., pour évaluer les performances d'adhésion du revêtement. The following is a detailed description of the adhesion of the coating and a comparison of different test methods:

The definition of coating adhesion and impact factors
Film adhesion refers to the degree of bonding between the coating and the substrate, which is affected by physical and chemical factors. The wettability of the coating and substrate surface roughness can affect adhesion. The adhesion directly affects the durability and protective performance of the coating.

Traction adhesion meter

Test method for adhesion of coatings
The adhesion of the coating can be determined by a variety of test methods, including the circling method, the scratching method and the pulling method.

Circling method: Use the circling adhesion tester to draw a round rolling line on the coating, and evaluate the adhesion grade according to the integrity of the coating within the scratch range. It is easy to operate and suitable for measuring the adhesion of a single coating.

Scribing: Use a high alloy rigid scribing knife to cut the coating into cross grids. To evaluate the resistance of the coating from the substrate separation and apply to the determination of thicker coating.

Description détaillée de l'adhérence du revêtement et comparaison des différentes méthodes de test

Pull method: at the specified speed, apply a vertical uniform tensile force to determine the force required for the adhesion between the coating or between the coating and the substrate to break down. It is suitable for the determination of thicker coating.

Advantages and disadvantages of the three adhesion test methods
The scratching method and the scratching method are indirect measurement methods. The results obtained not only reflect the adhesion force, but also include the deformation and resistance of the coating when it is damaged, but the operation is simple and widely used.

The pulling method is a direct measurement method, which can represent the adhesion force of the coating with numbers. It is a method to investigate the compatibility of the coating and comprehensively evaluate the overall adhesion effect of the coating. Cependant, the operation process is complex, and the test can only be carried out after the adhesive is completely cured.

Description détaillée de l'adhérence du revêtement et comparaison des différentes méthodes de test

Scratched adhesion meter

Applicable standards for domestic adhesion tests
Domestic commonly used adhesion test standards include:

GB/T 5210-1985 “Determination of adhesion of coating”

GB/T 9286-1998 “Paint and varnish paint film marking test marking method”

GB/T 1720-1979 “Paint film adhesion determination method circle method”

Circle method adhesion meter

How to determine the adhesion of paint film
Different methods can be used to test the adhesion of paint films, such as the circling method, the scratching method and the pulling method. These methods select the appropriate test method according to the thickness of the coating, application environment and other factors.

Description détaillée de l'adhérence du revêtement et comparaison des différentes méthodes de test

Circle drawing method: Use the circle drawing adhesion tester to scratch the paint film on the sample and observe the position of the film falling off to determine the adhesion level.

Scratch method: Use high alloy just scratch knife, cut the coating into cross lattice, evaluate the resistance of the coating from the substrate separation, suitable for thicker coating.

Pull method: at the specified speed, apply uniform tensile force to determine the force required for the destruction of coating adhesion. Suitable for thicker coating, can also be used for adhesion measurement between coatings.

En bref, coating adhesion test is an important part of the evaluation of coating performance, and different test methods are suitable for different types of coating and application scenarios. Selecting the appropriate test method can accurately evaluate the adhesion properties of the coating, so as to ensure the quality and service life of the coating.