AGENT FOR SEALING METALLIC GROUND COATS, ESPECIALLY GROUND COATS CONSISTING OF ZINC OR ZINC ALLOYS

摘要

Agent for sealing metallic substrates, in particular zinc or zinc alloy substrates, characterized in that it consists of an aqueous dispersion ofa) at least one silane derivative andb) a colloidal silica and/or colloidal silicate.This agent may be used for a direct coating of metallic substrates without chromatation.