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

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 summarized 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 thickness of films on their corrosion resistance was emphasized. The performance of sliding wear, fretting 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.