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Chemical Thermodynamics and Reaction Kinetics of Bayer Process Desilication Read chapter Read first chapter

2024 | OriginalPaper | Chapter

Electrowinning of Al-Sc Master Alloys in the LiF-AlF3-Sc2O3 Melts

Authors : Andrey Yasinskiy, Ilya Moiseenko, Dmitriy Varyukhin, Anastasia Saparova, Aleksandr Samoilo, Pavel Yuryev, Youjian Yang, Zhongning Shi, Zhaowen Wang, Peter Polyakov, Bernd Friedrich

Published in: Light Metals 2024

Publisher: Springer Nature Switzerland

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Abstract

Aluminum–scandium master alloys are highly demanded products used to create multi-functional aluminum alloys and composites. A high cost of Al-Sc master alloys stops the automotive industry from using them widely. This research investigates the possibility to produce Al-Sc master alloys via electrolysis of the LiF-AlF3-Sc2O3 melt. The kinetic parameters of the aluminum and scandium electrowinning were studied by means of voltammetry, stationary polarization, and electrolysis tests. The apparent limiting current density for co-deposition of Aluminum and Scandium on tungsten cathode was in the range from 1.28 to 1.97 A.cm–2 in the temperature range from 860 to 940 °C. Based on the electrochemical measurements, the parameters for galvanostatic electrolysis were selected and electrolysis tests were carried out to obtain Al-Sc master alloys. The microstructure of the obtained Al-Sc master alloys was studied. It was possible to obtain Al-Sc alloys with the concentration of Sc 0.68 wt.%.

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previous chapter Direct Production of Al-Mn Alloys During the Electrodeposition of Aluminum in a Laboratory Cell
next chapter Factors Affecting the Performance of Oxygen-Evolving Ni–Fe–Cu Anodes in Low-Temperature Molten Fluoride Electrolyte for Aluminium Electrowinning
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Metadata
Title
Electrowinning of Al-Sc Master Alloys in the LiF-AlF3-Sc2O3 Melts
Authors
Andrey Yasinskiy
Ilya Moiseenko
Dmitriy Varyukhin
Anastasia Saparova
Aleksandr Samoilo
Pavel Yuryev
Youjian Yang
Zhongning Shi
Zhaowen Wang
Peter Polyakov
Bernd Friedrich
Copyright Year
2024
Book
Light Metals 2024

Print ISBN: 978-3-031-50307-8

Electronic ISBN: 978-3-031-50308-5

Copyright Year: 2024

DOI
https://doi.org/10.1007/978-3-031-50308-5_78

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