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Permanent link (DOI): https://doi.org/10.7939/R3B65X

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The Studies of Thiosulfate and Lead-induced Stress Corrosion Cracking of Alloy 800 Open Access

Descriptions

Other title
Subject/Keyword
Alloys -- Stress corrosion
Heat resistant alloys
Stress corrosion
Metals -- Stress corrosion
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Yu, Liang
Supervisor and department
Dr. Jingli Luo, Chemical and Materials Engineering, University of Alberta
Examining committee member and department
Dr. Thomas H. Etsell, Chemical and Materials Engineering, University of Alberta
Dr. Xiaodong Wang, Mechanical Engineering, University of Alberta
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2011-01-27T18:00:50Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
Scratch test and scanning electrochemical microscopy (SECM) were applied to study the effects of thiosulfate on stress corrosion cracking (SCC) of Alloy 800 in simulated crevice solutions. The results showed that thiosulfate cathodically shifted the pitting potential of Alloy 800 significantly and the pitting morphology on the electrode surface was also different from that formed in the absence of thiosulfate. The synergistic effect between thiosulfate and stress was also observed, which was mainly promoting enhanced anodic dissolution at active sites. In the lead-induced stress corrosion crackings (PbSCC) work, the crack propagation rate (CPR) of Alloy 800 double cantilever specimen were estimated in neutral crevice chemistries solutions at 300 degree Celsius. The PbSCCof alloy 800 at high temperature were investigated by comparing the CPR rate of Pb-contaminated and Pb-free conditions. A repetitive behavior of crack advance was observed from the measurement. This observation is consistent with the film rupture model.
Language
English
DOI
doi:10.7939/R3B65X
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File title: Chapter 6
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