[Film Properties and Measurements] - Determination of film hardness

Determination of coating hardness

There are many methods for measuring the hardness of coating films. At present, there are 4 commonly used methods, namely swing rod damping hardness method, pencil hardness method (the mainstream coating hardness test method is measured by pencil Hardness Tester), scratch hardness method and indentation hardness method. Adopt the national standard "GB1730-88 Determination of Paint Film Hardness Swing Rod Damping Test" and "GB6739-86 Coating Film Hardness Pencil Determination Method".

The measurement of coating hardness is a method to evaluate the hardness and wear resistance of the coating surface. It is mainly used to test the hardness and scratch resistance of the coating surface.

The determination of the hardness of the coating film is usually tested by methods such as pencil hardness test, scratch hardness test, Rockwell hardness test, and multi-functional hardness test. Among them, pencil hardness test is one of the commonly used methods. Pencil hardness test uses pencils of different hardness to perform a scratch test on the coating surface to judge the hardness and wear resistance of the coating surface. Scratch hardness test is a scratch test on the coated surface using tools engraved with scratches of different shapes and depths. Rockwell hardness test is a hardness test on the coated surface using a Hardness Tester with a standard drill. Multifunctional hardness test is to use a multifunctional testing machine to apply different loads to the coating surface to test the hardness and strength of the coating.

The determination of coating hardness can be used to evaluate the hardness and wear resistance of various types of coating surfaces, such as automotive paints, furniture paints, industrial coatings, etc. By measuring the hardness and wear resistance of coating surfaces, the durability and life of coating surfaces can be predicted, providing basic data for formulating coating maintenance and improvement programs.