Dissolved Metal Species Mechanism for Initiation of Crevice Corrosion of Aluminum: I. Experimental Investigations in Chloride Solutions

Kurt Hebert, Richard Alkire

Research output: Contribution to journalArticlepeer-review

Abstract

Experiments on initiation of crevice corrosion were carried out on A1 specimens in dilute aqueous NaCI solutions at ambient temperature. Transient current distributions within crevices were measured by a sectioned electrode technique, and microsampling was used to monitor dissolved aluminum, pH, and [Cl] composition changes within the crevice prior to breakdown. Auxiliary (noncrevice) experiments were carried out in solutions having various pH, [Cl], and dissolved aluminum concentration. Initiation was found to occur upon exceeding a minimum concentration of dissolved aluminum inside the crevice. Mechanisms for initiation based on acidification within the crevice were excluded.

Original languageEnglish (US)
Pages (from-to)1001-1007
Number of pages7
JournalJournal of the Electrochemical Society
Volume130
Issue number5
DOIs
StatePublished - May 1983

Keywords

  • aluminum
  • chloride
  • corrosion
  • crevice

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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