Repassivation behaviour of stressed aluminium electrodes in aqueous chloride solutions

Changwen Mi, Nishant Lakhera, Demitris A. Kouris, Daniel Buttry

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)10-16
Number of pages7
JournalCorrosion Science
Volume54
Issue number1
DOIs
StatePublished - Jan 1 2012

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Keywords

  • A. Aluminium
  • C. Anodic dissolution
  • C. Repassivation
  • D. Modelling studies

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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