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

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Light Metals 2024 (TMS 2024)

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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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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Acknowledgements

The work was performed by the Laboratory of Low-Carbon Metallurgy and Energy under the state assignment of the FSAEI HE “Siberian Federal University”, a participating organization of the REC “Yenisei Siberia”, as part of the national project “Science and Universities”, project number FSRZ-2024-0004. The results presented in the paper were obtained in 2021.

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Authors and Affiliations

  1. Laboratory of Physics and Chemistry of Metallurgical Processes and Materials, Siberian Federal University, 660025, Krasnoyarsk, Russia

    Andrey Yasinskiy, Ilya Moiseenko, Dmitriy Varyukhin, Anastasia Saparova, Aleksandr Samoilo, Pavel Yuryev & Peter Polyakov

  2. IME Process Metallurgy and Metal Recycling, RWTH Aachen University, 52056, Aachen, Germany

    Andrey Yasinskiy & Bernd Friedrich

  3. Key Laboratory for Ecological Metallurgy of Multimetallic Minerals (Ministry of Education), Northeastern University, Shenyang, 110819, China

    Andrey Yasinskiy, Youjian Yang, Zhongning Shi & Zhaowen Wang

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  1. Andrey Yasinskiy
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  2. Ilya Moiseenko
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  3. Dmitriy Varyukhin
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  4. Anastasia Saparova
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  5. Aleksandr Samoilo
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  6. Pavel Yuryev
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  7. Youjian Yang
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  8. Zhongning Shi
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  9. Zhaowen Wang
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  10. Peter Polyakov
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  11. Bernd Friedrich
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Correspondence to Andrey Yasinskiy .

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  1. Oculatus Consulting, Marietta, GA, USA

    Samuel Wagstaff

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Yasinskiy, A. et al. (2024). Electrowinning of Al-Sc Master Alloys in the LiF-AlF3-Sc2O3 Melts. In: Wagstaff, S. (eds) Light Metals 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50308-5_78

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