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Localized corrosion of alloy 22 in the potential Yucca Mountain repository environment

Authors
  • He, Xihua1
  • Mintz, Todd1
  • 1 Southwest Research Institute, 6220 Culebra Road, San Antonio, TX, 78238, USA , San Antonio (United States)
Type
Published Article
Journal
JOM
Publisher
Springer US
Publication Date
Jan 12, 2008
Volume
60
Issue
1
Pages
44–51
Identifiers
DOI: 10.1007/s11837-008-0007-1
Source
Springer Nature
Keywords
License
Yellow

Abstract

The U.S. Department of Energy (DOE) has indicated that it may use Alloy 22 as the waste package outer container material for the potential high-level waste repository at Yucca Mountain, Nevada. Additionally, a drip shield, made of titanium grade 7 and titanium grade 29, may extend the length of the emplacement drifts to enclose the top and sides of the emplaced waste package. Localized corrosion in the form of crevice corrosion could be one degradation process that may adversely affect the waste package performance. This paper will summarize the work conducted to evaluate the effects of environmental conditions relevant to the potential Yucca Mountain repository, metallurgical states (e.g., mill-annealed and welded plus solution annealed), and similar and dissimilar metal crevices on the crevice corrosion susceptibility of Alloy 22. This work also evaluates crevice corrosion propagation behavior resulting from contact with Alloy 22 or titanium grade 7.

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