Corrosion Resistance of as-rolled Mg-Li-AlSi Alloys

摘要

In this paper, single α-phase alloys (Mg-4Li, Mg-4Li-3AlSi) and single β-phase alloys (Mg-12Li, Mg-12Li-3AlSi) were used as the research object. The corrosion behaviors of four alloys in 3.5wt% NaClsolution are investigated. The influence of elemental Al and Si on the corrosion resistance of the alloyis revealed. The corrosion resistances of α-phase alloy Mg-4Li and Mg-4Li-3AlSi are obviously betterthan that of β-phase alloy Mg-12Li and Mg-12Li-3AlSi. The addition of Al-Si master alloy couldincrease the rate of hydrogen evolution and decrease the corrosion resistance of the alloy. The surfacephase of the Mg-Li-AlSi is mainly consist of α-Mg, β-Li, Mg(OH)2, Al2O3 and Mg2Si.