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Journal article
A percolation theory for designing corrosion-resistant alloys
NATURE MATERIALS, v 20(6), pp 789-+
Jun 2021
PMID: 33526878
Abstract
Iron-chromium and nickel-chromium binary alloys containing sufficient quantities of chromium serve as the prototypical corrosion-resistant metals owing to the presence of a nanometre-thick protective passive oxide film(1-8). Should this film be compromised by a scratch or abrasive wear, it reforms with little accompanying metal dissolution, a key criterion for good passive behaviour. This is a principal reason that stainless steels and other chromium-containing alloys are used in critical applications ranging from biomedical implants to nuclear reactor components(9,10). Unravelling the compositional dependence of this electrochemical behaviour is a long-standing unanswered question in corrosion science. Herein, we develop a percolation theory of alloy passivation based on two-dimensional to three-dimensional crossover effects that accounts for selective dissolution and the quantity of metal dissolved during the initial stage of passive film formation. We validate this theory both experimentally and by kinetic Monte Carlo simulation. Our results reveal a path forward for the design of corrosion-resistant metallic alloys. A percolation theory of alloy passivation is developed accounting for selective dissolution and the quantity of metal dissolved during the primary passivation process, which provides a quantitative way for designing corrosion-resistant alloy compositions.
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Details
- Title
- A percolation theory for designing corrosion-resistant alloys
- Publication Details
- NATURE MATERIALS, v 20(6), pp 789-+
- Publisher
- NATURE RESEARCH; BERLIN
- Grant note
- K.S., A.A. and Y.X. acknowledge funding from the National Science Foundation under award DMR-1708459. M.L.T. and K.S. acknowledge funding in part from the Office of Naval Research, Multidisciplinary University Research Initiative programme under award N00014-20-1-2368. D.M.A. and R.C.N. were funded by NSERC (Canada) and UNENE, the University Network of Excellence in Nuclear Engineering. P.P.L. acknowledges support by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:000613590700001
- Scopus ID
- 2-s2.0-85100300643
- Other Identifier
- 991021860761304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter