Surface treatment agent for metal, process for surface treatment of metallic substances and surface-treated metallic substances

Abstract

A surface treatment for metal, prepared by adding a cationic or nonionic, urethane, acrylic, epoxy, polyester, or polyamide resin, a resin compound represented by the general formula (I), and a compound of Zr, Ti, V, Mo, W, Mn, or Ce to water; a process for surface treatment of metallic substances; and surface-treated metallic substances: (I) [wherein R1 is -CH2-, -CH2-NH-C H2- , or -CH=N-CH2-; Y is H or a group represented by the general formula (II): (II) Z is a residue of an aromatic compound or the like; W is H or a group ( P) selected from among -CH2X, -CH2NHCH2X, and -CH=NCH2X (wherein X is OH, OR4, halogeno, -N(R5)(R6), or -N+(R7)(R8)(R9)A-) , with the proviso that the degr ee of substitution with the group (P) satisfies the relationship: (number of Ps ) / (total number of benzene rings and Zs) = 0.2 to 4.0; n is 0 to 29; and m is 0 to 10]. The surface treatment is free from chromium and can impart excellent corrosion resistance, alkali resistance and fingerprinting resistance to metallic substances.

Description

technical field [0001] The present invention relates to a metal surface treatment agent and a metal surface treatment agent which can impart excellent corrosion resistance, alkali resistance, and fingerprint resistance to the surface of a sheet, coil, and molded product using metal as a material, and which can be used to form a chromium-free film Methods, surface treated metal materials. [0002] Furthermore, the present invention relates to imparting excellent corrosion resistance to molded products, cast products, sheet coils, and the like of automobile bodies, automobile parts, building materials, home appliance parts, and the like made of galvanized steel sheets, steel sheets, and aluminum-based metal materials. properties, alkali resistance, solvent resistance, and fingerprint resistance, surface treatment agents, surface treatment methods, and surface-treated metal materials that can be used to form chromium-free coatings. Background technique [0003] Metal materials...

AI Technical Summary

Problems solved by technology

[0006] However, in the metal surface treatment that does not use chromium, it is advantageous that the treatment liquid does not contain hexavalent chromium, but on the other hand, it has insufficient corrosion resistance, and the corrosion resistance of the damaged part and the processed part in particular is lower than that of chromate. The film is remarkably poor, and the fingerprint resistance, scratch resistance and lubricity are not sufficient

[0007] Therefore, currently, there is no non-chromate-based metal surface treatment agent that can form a film on the surface of a metal material that can simultaneously impart excellent corrosion resistance, alkali resistance, and fingerprint resistance.

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