METHOD FOR PERFORMING ELECTROPOLISHING TREATMENT ON ALUMINUM MATERIAL

摘要

Provided is a method of performing electropolishing treatment on an aluminum material, which is capable of easily producing an aluminum material having an excellent outer appearance with luster and uniformity on an industrial scale. The method of performing electropolishing treatment on an aluminum material includes immersing the aluminum material in an electrolytic treatment solution in an electrolytic treatment tank, and applying an electrolysis voltage through use of the aluminum material as an anode, to thereby perform electropolishing treatment on a surface of the aluminum material, the method including: performing, as pretreatment for the electropolishing treatment, anodic oxidation treatment; performing, during the electropolishing treatment, bubble-diffusion-preventing treatment; and performing, as post-treatment for the electropolishing treatment, film peeling treatment for an electropolishing film.

主权项

1. A method of performing electropolishing treatment on an aluminum material including immersing an aluminum material formed of aluminum or an aluminum alloy in an electrolytic treatment solution in an electrolytic treatment tank, and applying an electrolysis voltage through use of the aluminum material as an anode, to thereby perform electropolishing treatment on a surface of the aluminum material,
the method comprising, as pretreatment for the electropolishing treatment, performing anodic oxidation treatment including subjecting the aluminum material to anodic oxidation in a pretreatment tank arranged separately from the electrolytic treatment tank at a voltage lower than the electrolysis voltage during the electropolishing treatment through use of a pretreatment solution formed of a polybasic acid aqueous solution having a weak ability to dissolve the aluminum material as compared to the electrolytic treatment solution, to thereby form an anodic oxide film on the surface of the aluminum material.