Abstract
The corrosion behavior of AM60 alloy with different Nd content (0%~1.2%, mass frac- tion) in 3.5%NaCl solution was studied by means of immersion test and potention dynamic polar- ization measurement, as well as scanning electronic microscopy (SEM), energy-dispersive spectros- copy (EDS) and X-ray diffractometry (XRD). The results show that the addition of rare earth Nd in AM60 alloy can refine grains and strengthen grain and phase boundaries of the alloy. The addition of rare earth Nd may play rolls in shifting positively the corrosion potential of the alloy, decreasing the contact area between the activated Mg and H + , and slowing down the effect of Mg17Al12 on the corrosion of α phase in the alloy. Therefore, the corrosion resistance of AM60 alloy is enhanced by the addition of Nb effectively.
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