Corrosion and wear properties of PEO coatings formed on AM60B alloy in NaAlO2 electrolytes

► The microstructure, phase constituents, corrosion and wear resistance of PEO coatings formed on AM60B alloy in electrolytes with different NaAlO2 concentrations were investigated. ► The main phases in the coating were revealed by X-ray diffraction to be MgAl2O4 and MgO, and the relative amount of MgAl2O4 in the coatings increased with increasing NaAlO2 concentration in the electrolyte. The coatings were relatively compact and provided significantly improved corrosion resistance for magnesium alloy. Pin-on-disk wear tests showed that the PEO treatment reduced the wear volume loss by a factor of 10.