Electrochemical behaviour of manganese in the aluminium electrorefining bath |
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| Authors: | J. Chryssoulakis J. Bouteillon D. Inman |
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| Affiliation: | (1) Laboratoire d'Energétique Electrochimique Associé au CNRS (LA 265)E.N.S.d'Electrochimie et d'Electrométallurgie B.P. 44, Domaine Universitaire, 38401 St-Martin D'Heres, France;(2) Department of Metallurgy and Materials Science, Imperial College, London SW7, UK |
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| Abstract: | The study of the mechanism of the electrode reaction Mn(II)/Mn in the aluminium electrorefining bath free of aluminium fluoride (1·48 NaF-1·05 BaCl2) has been carried out by chronopotentiometry with an inert graphite electrode, a manganese electrode and a platinum electrode; this study was supplemented by utilizing anodic chronopotentiometry with current reversal from a stationary state. The tests carried out at 800° C show that the exchange mechanism of Mn(II)/Mn is reversible, involves the exchange of two electrons and that the diffusion coefficient DMn(II)=(1·9±0·5)×10–5 cm2 s–1. |
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