Dip-coating method for protecting chromatized or passivated zinc coatings on steel or the like

摘要

Chromated or passivated (phosphated) zinc and zinc alloy coatings on workpieces are provided with a protective coating which is largely inorganic and formed from titanium or zirconium chelate and/or titanium or zirconium acid ester and an organofunctional polysiloxane applied in solution form by a post-treatment dipping.