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Developing a Predictive Model of Near-Neutral pH Stress Corrosion Cracking of Underground Pipelines Open Access


Other title
Stress Corrosion Cracking
Type of item
Degree grantor
University of Alberta
Author or creator
Conrad, Brett M
Supervisor and department
Chen, Weixing (Chemical and Materials Engineering)
Examining committee member and department
Adeep, Samer (Civil and Environmental Engineering)
Chen, Weixing (Chemical and Materials Engineering)
Li, Dongyang (Chemical and Materials Engineering)
Li, Leijun (Chemical and Materials Engineering)
Department of Chemical and Materials Engineering
Materials Engineering
Date accepted
Graduation date
Master of Science
Degree level
Near neutral pH Stress Corrosion Cracking (NNpHSCC) on underground oil and gas pipelines is an issue facing industry today. Determining where NNpHSCC is likely to occur and grow is an important aspect to developing an Integrity Management Program. This work focused on developing a predictive model to capture the mechanisms involved with NNpHSCC growth utilizing actual field data. In order to better fit the field findings with the limited laboratory runs, different Hydrogen Enhancement Factors (HEF) were applied depending on the conditions of a given loading cycle. The predictive model generated results which demonstrated to distinct portions of NNpHSCC growth: a dissolution controlled phase and a mechanically activated phase. The output of the model was then compared to the field findings, with varied success. Further improvement and calibrations are required along with the gathering of additional field and laboratory data to fine-tune the field validation of the predictive model.
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.
Citation for previous publication
Developing a Predictive Model of Near Neutral pH Stress Corrosion Cracking of Underground Pipelines. Conrad, Brett, et al. Calgary : American Society of Mechanical Engineers, 2012. International Pipeline Conference.

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