Electrolytically Galvanised 3-Cation Prephosphated Sheet in the Auto Industrie

The paper reports on the introduction of a tricationic prephosphating process for electrolytically galvanized steel strip (EZ sheet). The properties achieved by way of prephosphating are described. The aspects of corrosion protection, paint adhesion and formability are discussed, as well as questions concerning development and application, the practical worth of prephosphating from the point of view of the auto industry.