Corrosion Properties of Al2O3-TiO2 Ceramic Coatings Deposited by Plasma Spraying on AZ91 Magnesium Alloy in Different Environment

Magnesium and its alloys are used in many industrial fields and are the lightest material group among green materials, but it limits the usage area due to its low corrosion resistance. Surface coating methods are used to improve the corrosion properties. In this study, it was aimed to determine the corrosion behavior of AZ91 magnesium alloy in different corrosive environments (0.3 M H2SO4 and 3.5% NaCl). For this purpose, different ratios of Al2O3 and TiO2 were coated on AZ91 Mg alloy using the Atmospheric Plasma Spray (APS) method. At the end of the study, the highest corrosion resistance was obtained in the 100% Al2O3 coated samples, and the corrosion rate in the 3.5% NaCl corrosive environment was higher than that of the 0.3 M H2SO4.