| abstract |
The object of the present invention is to provide a metal surface treatment that can provide a corrosion resistance comparable to chromate treatment or zinc phosphate treatment, and can form a coating with excellent adhesion to a coating formed by a coating process after treatment. Compositions and metal surface treatment methods are provided. A metal surface treatment composition comprising (A) a titanium compound and / or a zirconium compound, and (B) a condensation reaction product of an aminosilane (b1) and a polysilyl functional silane (b2). Content of titanium compound and / or zirconium compound (A) is 5 to 10,000 ppm in terms of metal element, and content of condensation reaction product (B) of aminosilane (b1) and polysilyl functional silane (b2) is solid. The partial concentration is 1 to 5,000 ppm. [Selection figure] None |