| abstract |
The present invention provides an anti-corrosive coating composition suitablenfor metal, particularly zinc-coated steel plates, which is free of chromium, is capable ofnconferring excellent corrosion resistance on the metal coated therewith, and is excellentnin storage stability, in which silane coupling agent and/or hydrolyzate condensatesnthereof is contained in water or an aqueous resin solution or suspension; in addition thencomposition may additionally contain phosphorus containing ions and/or sulfur-containingncompound or sulfur-containing ions; a method for anti-corrosive coating ofnmetal materials and metal materials coated with the composition. |