METHOD FOR PROCESSING SURFACES OF ALUMINIUM ALLOY SHEETS AND STRIPS

摘要

The invention relates to a method for processing the surface of a strip, sheet or a shaped part made of an aluminium alloy which involves the preparation of a surface with the aid of an atmospheric pressure plasma and a by chemical conversion treatment using at least the following elements Si, Ti, Zr, Ce, Co, Mn, Mo or V for producing a conversion coating on said strip, sheet or part. The inventive processing is more rapid and less costly than previous conversion treatments and is applied, in particular for strips and sheets which are used for a car body and assembled by welding or gluing.