This International Standard specifies test methods using following 3 kinds of abrasion apparatus:a) abrasive wheel wear test apparatus: determining the wear resistance and the wear index of anodicoxidation coatings on flat specimens of aluminium and its alloys;b) abrasive jet test apparatus: comparing the resistance to abrasion of anodic oxidation coatings onaluminium and its alloys with that of a standard specimen or, alternatively, a reference specimen, byuse of a jet of abrasive particles;c) falling sand abrasion apparatus: determining the abrasion resistance with falling sand applied to thinanodic oxidation coatings.The use of these methods for coatings