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 language | English (US) |
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Pages (from-to) | 1001-1007 |
Number of pages | 7 |
Journal | Journal of the Electrochemical Society |
Volume | 130 |
Issue number | 5 |
DOIs | |
State | Published - 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