A percolation theory for designing corrosion-resistant alloys

Yusi Xie, Dorota M. Artymowicz, Pietro P. Lopes, Ashlee Aiello, Duo Wang, James L. Hart, Elaf Anber, Mitra L. Taheri, Houlong Zhuang, Roger C. Newman, Karl Sieradzki

研究成果: Article同行評審

60 引文 斯高帕斯(Scopus)

摘要

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 film1–8. 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 components9,10. 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.

原文English
頁(從 - 到)789-793
頁數5
期刊Nature Materials
20
發行號6
DOIs
出版狀態Published - 6月 2021
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