ÖNORM EN 12373-9

This Part of this European Standard specifies a method of test for determining the wem resistance and the wear index of anodic oxidation coatings on flat specimens of aluminium and its alloys by means of an abrasive wheel wear test apparatus. The wear resistance or the wear index of the layers of oxide near the surface, or of the whole oxidation coating thickness, or of any selected intermediate Zone, can be determined by the method described. For most purposes the wear index (see 7.3) or the mass wear index (see 7.4) will be the most appropriate characteristic to detemiine. The method is applicable to all anodic oxidation coatings of thickness not less than 5 Pm on flat alurninium specimens. This method is not applicable to concave or convex specimens; these may be examined using the abrasive jet test method (see EN 12373-10)) which will give an average value for the abrasion resistance of the coating. NOTE: Muiimurn test specimen dimensions of 50 rnm X 50 mm are normally required.