Induction and pore-formed stages in Al2Au’s dealloying process in HCl solutions

Authors

Z. C. Yan
L. Y. Guo
Q. Chen
H. Zhang
X. Y. Chen
K. B. Kim
Lai-Chang Zhang, Edith Cowan UniversityFollow
W. M. Wang

Document Type

Journal Article

Publication Title

Corrosion Science

Volume

181

Publisher

Elsevier

School

School of Engineering

RAS ID

32748

Funders

National Natural Science Foundation of China

Comments

Yan, Z. C., Guo, L. Y., Chen, Q., Zhang, H., Chen, X. Y., Kim, K. B., ... Wang, W. M. (2021). Induction and pore-formed stages in Al2Au’s dealloying process in HCl solutions. Corrosion Science, 181, article 109220. https://doi.org/10.1016/j.corsci.2020.109220

Abstract

© 2020 Elsevier Ltd Two stages, induction stage and pore-formed stage, were distinguished in Al2Au's dealloying process in HCl solutions by OCP, SEM and XPS characterization. In induction stage, the Au state with binding energy 85.4 eV (labelled as Al2Au (I)) was transformed into the state 84.7 eV (Al2Au (II)); in pore-formed stage, nanoporous structure started to be formed, Al2Au (II) and residual Al2Au (I) were transformed into the state 83.7 eV (pure Au). Multi-resolution analysis on OCP noise revealed that the induction stage and pore-formed stage undergo different corrosion modes: the former is local corrosion and the latter is global corrosion.

DOI

10.1016/j.corsci.2020.109220

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