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

Abstract

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.

Authors:
 [1];  [2];  [3];  [3];  [3];  [4];  [2]; ORCiD logo [1]
  1. Centre National de la Recherche Scientifique (CNRS), Paris (France)
  2. Univ. of Virginia, Charlottesville, VA (United States)
  3. QuesTek Innovations, LLC, Evanston, IL (United States)
  4. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
Univ. of Virginia, Charlottesville, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Contributing Org.:
Chimie Paristech, PSL University, CNRS, France
OSTI Identifier:
1666930
Grant/Contract Number:  
SC0016584
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Electrochemical Society (Online)
Additional Journal Information:
Journal Name: Journal of the Electrochemical Society (Online); Journal Volume: 167; Journal Issue: 6; Journal ID: ISSN 1945-7111
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

Citation Formats

Li, Xuejie, Han, Junsoo, Lu, Pin, Saal, James E., Olson, Gregory B., Frankel, Gerald S., Scully, John R., and Ogle, Kevin. Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry. United States: N. p., 2020. Web. doi:10.1149/1945-7111/ab7f86.
Li, Xuejie, Han, Junsoo, Lu, Pin, Saal, James E., Olson, Gregory B., Frankel, Gerald S., Scully, John R., & Ogle, Kevin. Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry. United States. doi:10.1149/1945-7111/ab7f86.
Li, Xuejie, Han, Junsoo, Lu, Pin, Saal, James E., Olson, Gregory B., Frankel, Gerald S., Scully, John R., and Ogle, Kevin. Mon . "Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry". United States. doi:10.1149/1945-7111/ab7f86. https://www.osti.gov/servlets/purl/1666930.
@article{osti_1666930,
title = {Communication—Dissolution and Passivation of a Ni-Cr-Fe-Ru-Mo-W High Entropy Alloy by Elementally Resolved Electrochemistry},
author = {Li, Xuejie and Han, Junsoo and Lu, Pin and Saal, James E. and Olson, Gregory B. and Frankel, Gerald S. and Scully, John R. and Ogle, Kevin},
abstractNote = {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.},
doi = {10.1149/1945-7111/ab7f86},
journal = {Journal of the Electrochemical Society (Online)},
number = 6,
volume = 167,
place = {United States},
year = {2020},
month = {3}
}

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