Oxidation behavior of Mg-Gd binary alloys at elevated temperatures and the effect on corrosion property

Abstract

Abstract The oxidation behavior of magnesium alloy in air at the temperature of 500 ° C to 650 ° C was evaluated abstractly. Increasing Gd content in the alloy is beneficial for the enhanced of oxidation resistance. After Mg-1.5Gd and Mg-3.5Gd alloys were oxidized in air at 500 °C for 6h, dense and smooth oxide films dominated by MgO and Gd2O3 were formed on their surfaces. Gd2O3 content in the oxide films increased with increasing Gd content in the alloy. The oxidized alloys with high content of Gd (1.5 wt.% and 3.5 wt. %) exhibited good corrosion resistance when immersed in salt solution for 100 h.