Summary on Corrosion Behavior and Micro-arc Oxidation for Magnesium Alloys

Abstract

Corrosion phenomena such as galvanic corrosion, pitting, stress corrosion cracking and corrosion fatigue as well as the relevant anti-corrosion measures for magnesium alloys were sum- marized and analyzed. The micro-arc oxidation (MAO) technology for Mg-alloys was introduced in the aspects of process technique, film structure, corrosion resistance, abrasion resistance, sealing treatment, film inspection and post-repair processing etc., while, the effect of structure and thick- ness of films on their corrosion resistance was emphasized. The performance of sliding wear, fret- ting wear and impact wear of the MAO films was also introduced. It is noted that a proper sealing treatment can effectively improved the entire film density, and thereby the corrosion resistance of the MAO films.