Describes 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.