Process Characteristics and Experiment on Micro Arc Oxidation of Light Metals

摘要

Micro arc oxidation (MAO) is a relatively new method of surface treatments which has been used to improve the mechanical and tribological behavior of light metals. Due to the ceramic coating generated by MAO, light metals can be used more widely. The fundamental of MAO and the influence factors of MAO process are discussed here. The surface characteristics of aluminum, titanium, magnesium, Zirconium and stainless steels have been improved by MAO. Scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDS) were used to study the surface morphology and the elemental composition of the MAO coating. The EDS analysis of the coating shows the elements in the electrolyte and oxygen have incorporated into the coating.