Journal
CORROSION SCIENCE
Volume 54, Issue -, Pages 10-16Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.08.053
Keywords
Aluminium; Anodic dissolution; Repassivation; Modelling studies
Funding
- United States Department of Defense [DODAF41611]
- Jiangsu Higher Education Institutions (PAPD)
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The combined influence of mechanical stress and chemical environment on the pitting susceptibility of aluminium electrodes was studied by integrating open circuit potential measurements and electrochemical repassivation modelling. The transient degradation of aluminium oxide owing to a tensile stress field and its subsequent repasSivation are observed as an abrupt negative potential excursion followed by a slow decay of the corrosion potential back towards its initial value prior to the mechanical loading. Experiments were performed and an electrochemical repassivation model was established to quantitatively describe the dependence of oxide dissolution rate and the reciprocal of cathodic Tafel slope on chloride concentration. (C) 2011 Elsevier Ltd. All rights reserved.
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