Open AccessPassivation of Cu-Rh Alloys
Author(s) -
Yusi Xie,
Swarnendu Chatterjee,
Lingzhi Liu,
Hai-Jun Jin,
Karl Sieradzki
Publication year - 2021
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ac0f60
Subject(s) - passivation , alloy , percolation theory , materials science , metal , composition (language) , percolation (cognitive psychology) , chemical physics , condensed matter physics , metallurgy , chemistry , nanotechnology , physics , layer (electronics) , conductivity , linguistics , philosophy , neuroscience , biology
Historically, there have been two general approaches for understanding alloy passivation behavior. One involves study of the composition and crystal structure of the passive film and the other is concerned with how the composition and structure of the metallic alloy dictates the formation of the film. Herein we describe a recently developed theory based on a conjecture of Sieradzki and Newman connected to percolation theory and use the theory to model the passivation behavior of a series of Cu-Rh alloys. Our results are in quantitative agreement with the predictions of this theory. We discuss how the theory elucidates the important role of short-range order in understanding how composition affects the details of the passivation process.