PRODUCING METHOD TO PERFORM A CHEMICAL CONVERSION TREATMENT WHILE BARREL POLISHING A MOLDED PRODUCT MADE OF MAGNESIUM ALLOY

摘要

PROBLEM TO BE SOLVED: To shorten remarkably a surface treatment process to contribute to cost reduction, by performing surface treatment and simultaneously barrel polishing of a workpiece which is a compact of a magnesium alloy.SOLUTION: A particulate polishing material, a compound and water are putted into a barrel, and further oxalic acid or citric acid, or oxalic acid and citric acid are added thereto, to thereby adjust PH of aqueous solution in the range of 3-6. Thereafter, a workpiece is chemically treated and simultaneously polished.