SURFACE TREATMENT METHOD FOR MAGNESIUM MATERIAL PRODUCT

PROBLEM TO BE SOLVED: To efficiently perform anodic oxidation treatment known as a means for increasing the corrosion resistance and wear resistance of a magnesium material product and the adhesion of a coating film, and to form a transparent film in which the polished face of metallic luster can be obtained. SOLUTION: Oxidation treatment is performed by energizing where on-off is repeated every several seconds under low voltage for a treatment time of about 10 s in an on time of about 1 to 2 s and an off time of ≥1 s using an anodic oxidation liquid obtained by adding a film formation smoothing agent to an alkali electrolytic liquid with a current stabilizer added. Thereafter, sealing treatment of the oxide film is performed with a transparent coating material. COPYRIGHT: (C)2004,JPO