Research Progress on the Wear and Corrosion Resistant Plasma Electrolytic Oxidation Composite Coatings on Magnesium and Its Alloys

Plasma electrolytic oxidation (PEO), as a cost effective and environmentally friendly technology, has been applied on magnesium its alloys to improve wear corrosion resistance. Additionally, combining with particles addition in the electrolyte and/or various post-treatments could diminish intrinsic structural defects of PEO coatings provide multifunctionalities, including resistance, self-lubrication, self-healing. This paper reviews recent progress composite prepared by situ incorporation functional alloys. The focus is given microstructural changes coatings, particularly behaviors.