Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry

Li, Xuejie; Han, Junsoo; Lu, Pin; Saal, James E.; Olson, Gregory B.; Frankel, Gerald S.; Scully, John R.; Ogle, Kevin

doi:10.1149/1945-7111/ab7f86

Title: Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry

Journal Article · Mon Mar 23 00:00:00 EDT 2020 · Journal of the Electrochemical Society (Online)

DOI:https://doi.org/10.1149/1945-7111/ab7f86· OSTI ID:1666930

Li, Xuejie ^[1]; Han, Junsoo ^[2]; Lu, Pin ^[3]; Saal, James E. ^[3]; Olson, Gregory B. ^[3]; Frankel, Gerald S. ^[4]; Scully, John R. ^[2];

^[1]

Centre National de la Recherche Scientifique (CNRS), Paris (France)
Univ. of Virginia, Charlottesville, VA (United States)
QuesTek Innovations, LLC, Evanston, IL (United States)
The Ohio State Univ., Columbus, OH (United States)

The formation and dissolution of the passive film on a novel NiCrFeRuMoW high entropy alloy in H₂SO₄ was measured with atomic emission spectroelectrochemistry. Passivation involved Cr and Ru enrichment, whether passivation was achieved spontaneously at open circuit or by potentiostatic step into the passive domain. The other elements, Ni, Fe, Mo, and W, dissolved at rates approximately proportional to their bulk concentrations. The air formed film showed only a Cr enrichment. Excellent corrosion resistance properties were indicated by spontaneous passivation, the low passive current in the polarization curve, and the absence of detectable elemental dissolution during the active peak.

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Research Organization:: Univ. of Virginia, Charlottesville, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Contributing Organization:: Chimie Paristech, PSL University, CNRS, France

Grant/Contract Number:: SC0016584

OSTI ID:: 1666930

Journal Information:: Journal of the Electrochemical Society (Online), Vol. 167, Issue 6; ISSN 1945-7111

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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