Preparation and characterization of anticorrosive layers deposited by micro-arc oxidation on low carbon steel

The obtained layers contain aluminum oxide's polycrystalline phases (Al2O3-α and Al2O3-γ), are porous and have a thickness ranging from 3 to 11 μm. It also has been observed that increasing the layer thickness also increases the concentration of Al2O3-α polycrystalline phase and the occurrence time of red salt (rust). The anticorrosion properties of the deposited layers are limited because of their porosity.