Localized corrosion of alloy 22 in the potential Yucca Mountain repository environment
Localized corrosion of alloy 22 in the potential Yucca Mountain repository environment
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DOI：
10.1007/s11837-008-0007-1
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发表时间：
2008-01
期刊：
影响因子：
2.6
通讯作者：
Xihua S. He;T. Mintz
中科院分区：
文献类型：
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作者：
Xihua S. He;T. Mintz
美国能源部(DOE)表示，它可能会使用合金22作为内华达州尤卡山潜在的高放射性废物储存库的废物包装外容器材料。此外，由7级钛和29级钛制成的滴护罩可以延长定位漂移的长度，以包围定位废物包装的顶部和侧面。以缝隙腐蚀形式出现的局部腐蚀可能是一种降解过程，可能会对废旧包装的性能产生不利影响。本文将总结所做的工作，以评估与潜在的尤卡山储存库相关的环境条件、冶金状态(例如，磨机退火态和焊接+固溶退火态)以及相似和不同的金属缝隙对22合金缝隙腐蚀敏感性的影响。这项工作还评估了因接触22号合金或7级钛而导致的缝隙腐蚀扩展行为。
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.