Localized corrosion initiation, propagation, and repassivation of corrosion resistant high-level nuclear waste container materials
- Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses
The initiation and repassivation of pitting and crevice corrosion of two candidate high-level nuclear waste container materials, type 316L stainless steel and alloy 825, were examined under a range of environmental conditions possible in a repository. The initiation and repassivation potentials for localized corrosion in short-term tests were determined to be a function of temperature, chloride concentration, and potential. Under long-term potentiostatic conditions, pitting and crevice corrosion were initiated at potentials much lower than those measured in short-term tests. Crevice corrosion occurred preferentially over pitting corrosion. Similar results were obtained when creviced specimens were connected through a zero resistance ammeter to a boldly exposed cathode of the same material. Localized corrosion was only observed when the potential of the creviced specimen was higher than the repassivation potential.
- OSTI ID:
- 367705
- Report Number(s):
- CONF-960389-; TRN: IM9640%%451
- Resource Relation:
- Conference: National Association of Corrosion Engineers (NACE) annual corrosion conference and exposition: water and waste water industries, Denver, CO (United States), 24-29 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of Corrosion/96 conference papers; PB: [6615] p.
- Country of Publication:
- United States
- Language:
- English
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