Effect of quasicrystalline phase on improving the corrosion resistance of a duplex structured Mg-Li alloy

The in situ formation of I-phase improves the corrosion resistance of the duplex structured Mg-6% Li alloy. Corrosion attack on the surfaces of Mg-6% Li alloy is very inhomogeneous and severe pits and filiform corrosion clearly occur on the surfaces after immersion in 0.1 M NaCl solution. For the I-phase-containing Mg-6% Li-6% Zn-1.2% Y alloy, the corrosion attack is homogeneous and no severe pits and filiform corrosion can be observed. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.