Localized corrosion behavior of a single-phase non-equimolar high entropy alloy
Abstract
In another work, a design method combining computational modeling and empirical knowledge has been reported to establish a more efficient paradigm for developing future corrosion resistant alloys. Using this approach, a single-phase non-equimolar high entropy alloy (HEA) was successfully designed and synthesized. In this work, a detailed experimental investigation of the localized corrosion behavior of this alloy is presented. The HEA was found to possess superior intrinsic pitting resistance and exhibit strong passivity, even in 6 M HCl. The ability of this HEA to initiate and propagate a pit has been studied. The pitting resistance was shown to result from the formation of a passive film with exceedingly strong resistance to breakdown and from a high resistance to pit propagation. Pitting was discovered to be significantly inhibited because of the extremely strong passivity, even in solutions with lower pH and higher chloride concentration than found in a typical local pit environment. The outstanding properties of the HEA validate the approach used for designing corrosion-resistant HEAs.
- Authors:
-
- The Ohio State Univ., Columbus, OH (United States)
- Univ. of Virginia, Charlottesville, VA (United States)
- QuesTek Innovations, LLC, Evanston, IL (United States)
- Publication Date:
- Research Org.:
- The Ohio State Univ., Columbus, OH (United States); Univ. of Virginia, Charlottesville, VA (United States); QuesTek Innovations, LLC, Evanston, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1601003
- Alternate Identifier(s):
- OSTI ID: 1547608
- Grant/Contract Number:
- SC0016584
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Electrochimica Acta
- Additional Journal Information:
- Journal Volume: 306; Journal Issue: C; Journal ID: ISSN 0013-4686
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; High entropy alloy; Corrosion resistant alloy; Pitting corrosion; Passivity; Computational design
Citation Formats
Li, Tianshu, Swanson, Orion J., Frankel, Gerald S., Gerard, Angela Y., Lu, Pin, Saal, James E., and Scully, J. R. Localized corrosion behavior of a single-phase non-equimolar high entropy alloy. United States: N. p., 2019.
Web. doi:10.1016/j.electacta.2019.03.104.
Li, Tianshu, Swanson, Orion J., Frankel, Gerald S., Gerard, Angela Y., Lu, Pin, Saal, James E., & Scully, J. R. Localized corrosion behavior of a single-phase non-equimolar high entropy alloy. United States. https://doi.org/10.1016/j.electacta.2019.03.104
Li, Tianshu, Swanson, Orion J., Frankel, Gerald S., Gerard, Angela Y., Lu, Pin, Saal, James E., and Scully, J. R. Mon .
"Localized corrosion behavior of a single-phase non-equimolar high entropy alloy". United States. https://doi.org/10.1016/j.electacta.2019.03.104. https://www.osti.gov/servlets/purl/1601003.
@article{osti_1601003,
title = {Localized corrosion behavior of a single-phase non-equimolar high entropy alloy},
author = {Li, Tianshu and Swanson, Orion J. and Frankel, Gerald S. and Gerard, Angela Y. and Lu, Pin and Saal, James E. and Scully, J. R.},
abstractNote = {In another work, a design method combining computational modeling and empirical knowledge has been reported to establish a more efficient paradigm for developing future corrosion resistant alloys. Using this approach, a single-phase non-equimolar high entropy alloy (HEA) was successfully designed and synthesized. In this work, a detailed experimental investigation of the localized corrosion behavior of this alloy is presented. The HEA was found to possess superior intrinsic pitting resistance and exhibit strong passivity, even in 6 M HCl. The ability of this HEA to initiate and propagate a pit has been studied. The pitting resistance was shown to result from the formation of a passive film with exceedingly strong resistance to breakdown and from a high resistance to pit propagation. Pitting was discovered to be significantly inhibited because of the extremely strong passivity, even in solutions with lower pH and higher chloride concentration than found in a typical local pit environment. The outstanding properties of the HEA validate the approach used for designing corrosion-resistant HEAs.},
doi = {10.1016/j.electacta.2019.03.104},
journal = {Electrochimica Acta},
number = C,
volume = 306,
place = {United States},
year = {Mon Mar 18 00:00:00 EDT 2019},
month = {Mon Mar 18 00:00:00 EDT 2019}
}
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