Hydrogen absorption and the lifetime performance of titanium nuclear waste containers

TitleHydrogen absorption and the lifetime performance of titanium nuclear waste containers
Publication TypeJournal Article
Year of Publication2000
AuthorsShoesmith DW, Noël JJ, Hardie D, Ikeda BM
JournalCorrosion Reviews
Volume18
Pagination331 - 359
Date Published2000///
ISBN Number0048-7538
AbstractFor the conditions expected in a Canadian nuclear waste vault, the two corrosion processes most likely to lead to the failure of titanium waste containers are crevice corrosion and/or hydrogen induced cracking (HIC). In this report the processes likely to lead to hydrogen absorption by titanium alloys (Grades-2, -12, -16), and hence to lender them susceptible to HIC are discussed. The possible paths to container failure via a combination of crevice corrosion, general passive corrosion and HIC are described and a criterion for container failure by HIC is defined. The modelling procedures developed to predict the consequences of hydrogen absorption are described, and the experimental methods used to measure required modelling parameters are discussed and the results summarized. The predictions of these models show that for alloys on which crevice corrosion either does not occur or is limited in extent (Ti-16 and Ti-12), container lifetimes of >10(5) a are achievable. As a result only those containers assumed to fail prematurely due to the presence of manufacturing defects need be included in assessment calculations
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