MANUFACTURING PROCESS FOR NONCONTINUOUS GALVANIZATION WITH ZINC-ALUMINUM ALLOYS OVER METALLIC MANUFACTURED PRODUCTS

摘要

A process is disclosed for non-continuous galvanization of a metal object comprising pre-coating the surface with a protective metal by an electroless process with a uniform, continuous, thin coating of the metal, and then dipping the pre-coated metal into a hot Zn-Al alloy bath and controlling the temperature and dipping time such that the pre-coating substantially completely reacts with Al in the bath to form an interface compound layer, thereby causing the ZnAl alloy bath to react with the surface of the metal a nd form an adherent layer and produce a continuous galvanized coating of good morphology.