Method for preventing filiform corrosion of aluminum wheels by powder coating with a thermosetting resin

摘要

Filiform corrosion of aluminum and of chrome-plated steel is prevented by covering the surface of the bare metal with a powder coating containing a major amount of a thermosetting resin selected from the group consisting of polyurethanes, polyesters, and acrylics; a minor, adhesion promoting amount of an epoxy resin; and either an ultra-violet light absorber or a hindered amine light stabilizer or a mixture of both, and baking the coated article to give a clear coating on the metal.