Effects of Er2(SO4)3 doping on characteristics of MAO coating

Abstract

To research the impact of various Er2(SO4)3 additions on the TC11 alloy's micro-arc oxidation (MAO) coating, the MAO coating was tested and examined using scanning electron microscopes (SEM), X-ray diffractometers (XRD), X-ray photoelectron spectroscopy (XPS), and electrochemical workstations. The findings demonstrate that the addition of Er2(SO4)3 raises the oxidation voltage, improves the uniformity of the discharge, reduces the dimension of the discharge micropores on the surface, and increases the density and thickness of the coating. The coatings contain the Er element, which appears as Er2O3, and it helps to refine the grain size, which encourages the formation of hard phases like anatase TiO2 and rutile TiO2 and enhances the coatings’ hardness, wear resistance, and corrosion resistance. At an amount of 1.5 g L−1, the Er2(SO4)3 enhanced the overall performance of the coating.