ISO 8251:2011 specifies the following three test methods:
a) abrasive-wheel-wear test method, determining the wear resistance and the wear index of anodic oxidation coatings on flat specimens of aluminium and its alloys;
b) abrasive jet test method, comparing the resistance to abrasion of anodic oxidation coatings on aluminium and its alloys with that of a standard specimen or, alternatively, a reference specimen, by use of a jet of abrasive particles;
c) falling sand abrasion method, determining the abrasion resistance with falling sand applied to thin anodic oxidation coatings.
