Corrosion Resistance of GdTbDyHoSc and GdTbDyHoY High-Entropy Rare-Earth Alloys with Protective Coatings
- Authors: Gelchinskiy B.R.1, Ignatieva E.V.1, Petrova S.A.2, Korolev O.A.1, Varaksin A.V.3, Sipatov I.S.1, Ilinykh N.I.2, Rempel A.A.4
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Affiliations:
- Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences
- Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
- Institute of Metallurgy of the Ural Branch of the RAS
- Institute of Metallurgy, Ural Branch of the Russian Academy of Sciences
- Issue: Vol 59, No 7 (2023)
- Pages: 750-758
- Section: Articles
- URL: https://journals.rcsi.science/0002-337X/article/view/231877
- DOI: https://doi.org/10.31857/S0002337X23070059
- EDN: https://elibrary.ru/VFCNXS
- ID: 231877
Cite item
Abstract
We have studied for the first time the feasibility of using Al2O3 and Al : Zn (1 : 1) coatings produced by supersonic plasma spraying for protecting GdTbDyHoSc and GdTbDyHoY high-entropy rare-earth (RE) alloys from corrosion in a salt-fog chamber. The results demonstrate that, under salt fog conditions, Al2O3 coatings break down through local surface activation, resulting in pitting corrosion, with a considerable fraction of the coating on the main material remaining intact. The alloys coated with Al : Zn (1 : 1) exhibit lower corrosion resistance under salt fog conditions as a consequence of electrochemical corrosion. Interaction of Al2O3 with NaCl limits the suitability of such coatings for protecting high-entropy RE alloys under salt fog conditions. Limitations refer to the specimen test time and coating thickness.
About the authors
B. R. Gelchinskiy
Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences
Email: ivan.sipatov@gmail.com
Russia, 620016, Ekaterinburg
E. V. Ignatieva
Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences
Email: ivan.sipatov@gmail.com
Russia, 620016, Ekaterinburg
S. A. Petrova
Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
Email: grig@solid.nsc.ru
Ekaterinburg, 620016 Russia
O. A. Korolev
Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences
Email: ivan.sipatov@gmail.com
Russia, 620016, Ekaterinburg
A. V. Varaksin
Institute of Metallurgy of the Ural Branch of the RAS
Email: vorax@yandex.ru
Russia, Yekaterinburg
I. S. Sipatov
Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences
Email: ivan.sipatov@gmail.com
Russia, 620016, Ekaterinburg
N. I. Ilinykh
Institute of Metallurgy, Ural Branch, Russian Academy of Sciences
Email: ninail@bk.ru
620016, Yekaterinburg, Russia
A. A. Rempel
Institute of Metallurgy, Ural Branch of the Russian Academy of Sciences
Author for correspondence.
Email: rempel.imet@mail.ru
Academician of the RAS
Russian Federation, 620016, Yekaterinburg, RussiaReferences
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