Abstract
Rapidly solidified Al–0.5Mg–0.1Sn–0.02In (0.02Ga)–0.1Si (wt. %) alloys were prepared as anode alloys for Al–air battery by the single roller melt-spinning method. The corrosion behavior of the alloys and the Al–air battery performance were investigated in both 2 M NaCl and 4 M NaOH solutions. Results obtained have shown that the Al–0.5Mg–0.1Sn–0.02Ga–0.1Si alloy has a better electrochemical performance in the 2 M NaCl solution, while Al–0.5Mg–0.1Sn–0.02In–0.1Si alloy shows a better electrochemical performance in the 4 M NaOH solution. In the 2 M NaCl solution, both alloys suffer from a uniform corrosion. In the 4 M NaOH solution, the corrosion morphology of the alloys evolves from an intergranular corrosion to a uniform corrosion. SEM and EIS results are in good agreement with electrochemical characteristics.
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