| abstract |
[Object] To provide a pollution-free surface treatment composition having rust-preventing power comparable to chromate treatment and phosphate treatment and excellent in storage stability. Based on (A) 100 parts by weight of a solid content of a nonionic aqueous resin dispersion, (B) a hydrolyzable titanium compound, a low-condensate of the hydrolyzable titanium compound, titanium hydroxide and titanium hydroxide. A titanium-containing aqueous liquid obtained by mixing at least one titanium compound selected from the group consisting of low-condensate with hydrogen peroxide solution is used in an amount of 4 to 100 parts by weight in terms of solid content, and (C) the organic phosphoric acid compound is used in an amount of 4 to 100 parts by weight. A surface treatment composition comprising 100 parts by weight and 4 to 100 parts by weight of a vanadium compound (D). [Selection diagram] None |