This standard document describes a micro-abrasion testing method specifically designed for fine ceramic coatings. Its core principle is based on the "ball cratering" technique, which involves using a rotating spherical indenter (typically a steel or carbide ball) to scratch the coating surface under a specific load, thereby creating tiny spherical wear craters. The method requires a dedicated micro-abrasion tester, an instrument capable of precisely controlling load, speed, and the motion trajectory of the indenter. By measuring the dimensions (diameter and depth) of the wear crater, the wear rate of the coating can be calculated, thereby accurately quantifying its micro-scale wear resistance.