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http://dx.doi.org/10.14773/cst.2011.10.2.071

Corrosion Properties of Al-(Ga, Sn, Mn) Alloy Anodes for an Al-air Battery in 4 M KOH Aqueous and Ethanol Solutions  

Lee, Han-Ok (Department of Metallurgy and Materials Engineering)
Park, Chan-Jin (Department of Materials Science and Engineering, Chonnam National University)
Jang, HeeJin (Department of Metallurgy and Materials Engineering)
Publication Information
Corrosion Science and Technology / v.10, no.2, 2011 , pp. 71-75 More about this Journal
Abstract
Corrosion properties of Al-0.3Ga-0.3Sn, Al-0.3Mn-0.3Ga, and Al-0.3Mn-0.3Sn alloys were examined to develop an anode material for Al-air battery with alkaline aqueous or ethanol electrolyte. The results of potentiodynamic polarization tests showed that the electrode potential of the Al alloys were lower than the pure Al, implying the cell voltage can be increased by using one of these alloys for an anode in 4 M KOH aqueous solution. The corrosion rate appeared to be increased by alloying Ga but to be reduced by Sn and Mn in the aqueous solution. The ethanol solution is expected to improve the cell performance in that the electrode potential and the corrosion rate of Al were lower in ethanol solution than in aqueous solution. However the Al-(Ga, Sn, Mn) alloys are not favorable in ethanol solution because of the high potential and corrosion rate.
Keywords
aluminum-air battery; anode; alkaline electrolyte; ethanol-based electrolyte; aluminum alloy;
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