polymer-containing prewash before a conversion treatment

摘要

The present invention relates to a multistage process for corrosion protection pretreatment of components made from metallic materials, in which, after a wet chemical treatment with an aqueous composition (a) containing a dissolved p-polymer and / or dispersion, which is substituted with heterocycles containing at least one quaternary nitrogen heteroatom, is followed by a conversion treatment based on water soluble compounds of the zr, ti and / or elements, before optionally applying other protective coatings. against corrosion.