Transition metal-based high entropy alloy microfiber electrodes: Corrosion behavior and hydrogen activity

Baran Sarac, Vladislav Zadorozhnyy, Yurii P. Ivanov, Florian Spieckermann, Semen Klyamkin, Elena Berdonosova, Mikhail Serov, Sergey Kaloshkin, A. Lindsay Greer, A. Sezai Sarac, Jürgen Eckert

Research output: Contribution to journalArticleResearchpeer-review


This contribution reveals ultra-high corrosion resistance of high entropy alloys (HEAs), i.e. Ti20Zr20Nb15V15Hf15Ta15 of 1.85 µm yr–1 in alkaline environment, adverting their use for battery/fuel cell components. Formation of several nanometers passive oxide layer confirmed by scanning transmission electron microscopy accounts for corrosion resistance which increases with TiOx content. Cathodic Tafel slope of 67 mV dec–1 and large transfer coefficient of 0.82 obtained for Ti20Zr20Nb20V20Ta20 suggest its use for hydrogen electrocatalysis. High amounts of hydrogen storage, 1.7 wt% in Ti25Zr25Nb15V15Ta20, were confirmed by gas-solid reactions. This HEA also has high corrosion resistance in acidic and saline environments ideal for coatings and surgical tools/implants.
Original languageEnglish
Article number109880
Number of pages10
JournalCorrosion science
Issue numberDecember
Early online date12 Oct 2021
Publication statusPublished - Dec 2021

Bibliographical note

Publisher Copyright: © 2021 Elsevier Ltd


  • Alkaline corrosion
  • EIS
  • gas-solid reactions
  • High entropy alloy
  • Passive film
  • STEM

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