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2020 | OriginalPaper | Buchkapitel

Electrochemical Behaviour of Cu-Al Oxygen-Evolving Anodes in Low-Temperature Fluoride Melts and Suspensions

verfasst von : Andrey S. Yasinskiy, Sai Krishna Padamata, Peter V. Polyakov, Aleksandr S. Samoilo, Andrey V. Suzdaltsev, Andrey Yu. Nikolaev

Erschienen in: Light Metals 2020

Verlag: Springer International Publishing

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Abstract

Cu-based alloys have been considered as promising candidates (along with the Fe-Ni alloys) for the inert anodes material in aluminium reduction cells with low-temperature electrolytes. However, low purity of aluminium due to the contamination by anode corrosion products is a problem yet to be solved. Introduction of alumina suspension as an electrolyte has been presented recently as a possible solution for providing commercial purity aluminium produced with the metallic anode. An attempt to characterize the CuAl-based anodes electrochemical performance in KF-AlF₃-Al₂O₃ melts and suspensions has been made and presented. The effects of the suspension (or melt) properties, the anode composition and the temperature on the electrochemical behaviour of the anode and the kinetics of the oxide layer formation during polarization are studied. The 90Cu-10Al anode in the KF-AlF₃-Al₂O₃ suspension with the cryolite ratio 1.3 and the dispersed phase volume fraction not more than 0.12 is found to be the good option for further investigations.

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Titel: Electrochemical Behaviour of Cu-Al Oxygen-Evolving Anodes in Low-Temperature Fluoride Melts and Suspensions
verfasst von: Andrey S. Yasinskiy
Sai Krishna Padamata
Peter V. Polyakov
Aleksandr S. Samoilo
Andrey V. Suzdaltsev
Andrey Yu. Nikolaev
Verlag: Springer International Publishing
Buch: Light Metals 2020
Print ISBN: 978-3-030-36407-6

Electronic ISBN: 978-3-030-36408-3

Copyright-Jahr: 2020
DOI: https://doi.org/10.1007/978-3-030-36408-3_81

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