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Electrochemical behaviour of Mg–Ce–Zn system

Abstract In the present work, the electrochemical behaviour of Mg–xCe–1Zn (x = 3, 8 and 13 wt-%) alloys has been investigated. The alloys were fabricated using an induction melting method under an argon atmosphere. Potentiodynamic polarisation was carried out in 3·5%NaCl solution of pH 7·2 at room temperature to evaluate the corrosion properties of Mg–xCe–1Zn (x = 3, 8 and 13 wt-%) alloys. The microstructure of the Mg–(3, 8 and 13 wt-%)Ce–1Zn alloys mainly consisted of α-Mg and eutectic Mg12Ce phase. With the increase in Ce contents, the volume per cent and size of the eutectic Mg12Ce phase were increased. Results indicated that the corrosion rate of Mg–xCe–Zn alloy was increased by excessive Ce addition.