| abstract |
Disclosed is a pollution-free aqueous metal surface treatment composition that does not contain chromium or fluorine compounds and can form a film having excellent workability, corrosion resistance, alkali resistance, lubricity, and the like, and is suitable for top coating. To do. SOLUTION: (A) Based on 100 parts by mass of resin solid content of an aqueous organic resin dispersion containing an anionic aqueous polyurethane resin, (B) 0.1 to 5.0 mass of organic phosphate compound in solid content Parts, (C) colloidal silica 5.0-50 parts by mass, (D) vanadium compound 0.5-15 parts by mass, (E) zirconium carbonate compound 1.0-20 parts by mass, (F) silane coupling agent 0 An aqueous metal surface treatment composition containing 1 to 5.0 parts by mass and (G) 5.0 to 30 parts by mass of a polyolefin wax and not containing a fluorine compound. [Selection figure] None |