Application of Laser Removal Processing on Magnesium Alloy Anodized from Phosphate Solution

Abstract

Effects of the laser removal processing on corrosion resistance and conductivity for the magnesium alloy products anodized from the phosphate electrolytic solution were examined. The area where anodized coating was removed under the appropriate laser irradiated condition showed the excellent corrosion performance as well as good conductivity. This improvement of the conductivity is attributable to the removal of the anodized coatings whose conductivity is not good, and molten sputter then formed from the magnesium alloy substrate by means of the laser thermo processing becomes covered with the anodized coatings. Furthermore, this excellent corrosion resistance is based on the sacrifice corrosion protection by anodizing from the phosphate electrolytic solution.