| abstract |
A chromium-free agent for treating metallic surface comprising the following (i)-(iv):(i) at least one of (A) a mixture of an aluminum salt and an inorganic oxide particle and (B) an aluminum-containing inorganic oxide particle comprising aluminum, oxygen and at least one element other than these two(ii) a salt of a metal other than aluminum(iii) a phosphorus compound(iv) a resin and/or a precursor thereof provided that when (i) is a mixture of an aluminum salt and an inorganic oxide particle, the equivalent ratio of phosphorus/aluminum is not less than 0.1.The agent for treating metallic surface is applied to the surface of a metal material such as steel plate, plated steel plate, alloy-plated steel plate, alloy plate, silicon steel plate, stainless steel plate,shape steel, pipe, wire material and the like, and dried to form a film superior in corrosion resistance, adhesion to a metal material and adhesion to a paint. The present invention is further relates to a metal material which has been subjected to a surface treatment with said agent for treating metallic surface, and to a metal material obtained by applying a resin to said metal material. |