A Review Corrosion of TI Grade 7 and Other TI Alloys in Nuclear Waste Repository Environments

Hua, F. ; Mon, K. ; Pasupathi, P. ; Gordon, G.

United States. Department of Energy. Yucca Mountain Project Office.

关键词: 08 Hydrogen;    Corrosion;    Alloys;    36 Materials Science;    Positioning;   

DOI  :  10.2172/837505
RP-ID  :  NONE
RP-ID  :  NONE
RP-ID  :  837505

美国|英语

来源: UNT Digital Library

【 摘 要 】

Titanium alloy degradation modes are reviewed in relation to their performance in repository environments. General corrosion, localized corrosion, stress corrosion cracking, hydrogen induced cracking, microbially influenced corrosion, and radiation-assisted corrosion of Ti alloys are considered. With respect to the Ti Grade 7 drip shields selected for emplacement in the repository at Yucca Mountain, general corrosion, hydrogen induced cracking, and radiation-assisted corrosion will not lead to failure within the 10,000 year regulatory period; stress corrosion cracking (in the absence of disruptive events) is of no consequence to barrier performance; and localized corrosion and microbially influenced corrosion are not expected to occur. To facilitate the discussion, Ti Grades 2, 5, 7, 9, 11, 12, 16, 17, 18, and 24 are included in this review.