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

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 Gd 2 O 3 were formed on their surfaces. Gd 2 O 3 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.