High-Temperature Oxidation Behavior and Corrosion Behavior of High Strength Mg-xGd Alloys with High Gd Content

Abstract Three alloys of Mg-0Gd, Mg-13Gd-0.5Zr and Mg-20Gd-0.6Zr (wt.%) are smelted to study the effect of high Gd content on the high-temperature oxidation and corrosion behavior. Results show that with the increasing content of Gd, the high-temperature oxidation resistance and corrosion resistance increase. Oxide film is divided into three layers. The outermost layer is Gd2O3 and a small amount of ZrO2, the middle layer is MgO and the bottom layer is the cubic phases (Gd, Zr)H2. The pitting depth of Mg-20Gd is 1/6 that of Mg-0Gd, forming a sacrificial anode and playing a cathodic protection role. Data availability The raw/processed data required to reproduce these findings cannot be shared at this time due to legal or ethical reasons.