Scanning microelectrode studies of early pitting corrosion of 18/8 stainless steel
- Xiamen Univ. (China). Dept. of Materials Science
- Univ. of Alberta, Edmonton, Alberta (Canada). Dept. of Chemical and Materials Engineering
The scanning microreference electrode (SMRE) technique was used to study the early stage of pitting corrosion of 18/8 stainless steel (SS) in solutions containing chloride (Cl{sup {minus}}) ions. Local breakdown of passivity and micropitting corrosion occurred in the potential region that was much more negative than the ordinary pitting potential (E{sub p}). A critical potential (E{sub r}) was measured by imaging the potential near the metal surface in solution to characterize the local rupture of passivity or micropitting initiation. The concept of metastable micropitting was adopted to discuss the mechanism of pitting corrosion in its early stage.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 644349
- Journal Information:
- Corrosion, Journal Name: Corrosion Journal Issue: 4 Vol. 54; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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