| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a precoating metallic material, in which the precoating metallic material having excellent paint adhesion, chemical resistance, corrosion resistance, and coin scratch resistance, and cold bending adhesion is obtained, and a pretreatment method of the precoating metallic material, and a pretreatment method of the precoating metallic material, and an aqueous surface-treatment agent excellent in storage stability used for the same. Ž<P>SOLUTION: In the pretreatment method of the precoating metallic material, the aqueous surface-treatment agent containing a water-soluble compound (A) having an alkoxysilyl group, an aromatic ring, a hydroxyl group directly bonded to the aromatic ring, and at least one amino group selected from a group consisting of a primary amino group, a secondary amino group, a ternary amino group, and a quaternary amino group, and a compound (B) containing at least one element selected from a group consisting of boron, titanium, zirconium, and silicon, is applied on the surface of the metallic material, then dried without cleaning the surface with water, for forming a pretreatment layer of 0.01 to 1 g/m<SP>2</SP>. The method for manufacturing a precoating metallic material is provided with a coating step for forming a resin layer on the pretreatment layer. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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