| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment method and a corrosion-resistant structure of an aluminum-based material, wherein sufficient corrosion resistance is given, reduction in wall thickness of the material is prevented, the need for performing any complicated control is eliminated, and the treatment cost is reduced. SOLUTION: The surface treatment method of the aluminum-based material comprises a degreasing step of degreasing a surface of a base material mainly consisting of aluminum, an oxide film forming step of forming an oxide film on the surface of the base material through hot water treatment, and a chemical conversion step of performing the chemical conversion on an upper layer of the oxide film by using a metallic salt. COPYRIGHT: (C)2008,JPO&INPIT
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