Sodium-Aluminum Equilibria in Cryolite-Alumina Melts
- 1 January 1956
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 103 (4) , 231-236
- https://doi.org/10.1149/1.2430284
Abstract
A qualitative and quantitative study of sodium‐aluminum equilibria in cryolite‐alumina melts was undertaken to shed more light on the cathode reactions in the aluminum cell. Measurements were made in alumina crucibles from 940° to 1010°C. Lead was used as an auxiliary sodium “sink.” Results show that, while aluminum is more noble than sodium, their deposition potentials are not far apart (of the order of 0.1–0.2 v), and that, under the nonequilibrium conditions existing in an industrial cell, some sodium may be codeposited with aluminum at the cathode.Keywords
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