Corrosion Behavior of Mg-14-1A1-0.1Ce Alloy in NaX(X=F,CI,Br and I)Solutions

The corrosion behavior of Mg-14Li-lAl-0.1Ce in sodium halide KaX(X=F,Cl,Br and I) solutions was investigated by immersion test and electrochemical methods.Its corrosion rate in various solutions was accessed by mass loss method.The phase constituent.chemical composition and morphologies of corroded surface after 48 h immersed in different solutions were characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM).The results revealed that the corrosion resistance of Mg-14Li-lAl-0.1Ce in sodium halide solutions decreased in the order: NaFNaINaBrNaCl.After immersed in Nal,NaBr.NaCl solution respectively,the corrosion products consisted of Mg(OH)2.Li3Mg7 and Li0.92Mg4.08.but for NaF solution,only Li3Mg7 and Li0.92Mg4.08 were found.Mg-Li-Al-Ce alloy showed passivation behavior in NaF solution.EIS results indicated that the corrosion product layer could not prevent the Mg-Li-Al-Ce alloy from further corrosion.