| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for surface treatment of an aluminum alloy capable of forming a uniform and dense zinc phosphate coating which has excellent corrosion resistance properties, on the surface of the aluminum alloy. SOLUTION: The surface of the aluminum alloy adjusted by a surface adjustor containing a predetermined volume of zinc phosphate particles, copolymer containing carboxylic acid group, and natural hectorite and/or synthetic hectorite respectively, and then the surface of the resultant aluminum alloy is subjected to chemical processing by a zinc phosphate treating agent containing a predetermined volume of chelating agent that can chelate bond with iron ion, thereby the uniform and dense zinc phosphate coating can be formed on the surface of the aluminum alloy. COPYRIGHT: (C)2006,JPO&NCIPI
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