| abstract |
PROBLEM TO BE SOLVED: To provide a magnesium alloy surface treatment method for obtaining a magnesium alloy having a surface excellent in corrosion resistance and paint adhesion. SOLUTION: The surface of a magnesium alloy is composed of 3 to 15 g / L phosphate ions, 1 to 6 g / L aluminate ions, 1 to 10 g / L fluoride ions, 1 to 8 g / L alkali metal hydroxide (sodium hydroxide). Soaked in an electrolytic solution containing (in conversion), anodized, then pyrophosphate ions 1-100 g / L, phosphate ions 1-60 g / L, fluoride ions 0.1-10 g / L, stannate ions A surface treatment method for a magnesium alloy comprising chemical conversion treatment with a chemical conversion treatment solution containing 0.1 to 10 g / L and metavanadate ions 0.1 to 10 g / L. [Selection figure] None |