Influence of surface characteristics on the stress corrosion cracking resistance of steel gas piplines /
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(Published version)
Date
2007
Authors
Kentish, Peter James,
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Type:
thesis
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Abstract
Stress corrosion cracking is a form of environmental cracking that occurs in various types of materials. Failure due to stress corrosion cracking can be catastrophic in that it may result in failure with little or no warning. It is a particular problem with metals subjected to simultaneous mechanical stress/strain and specific environments, which may not be particularly aggressive on their own. Stress corrosion cracking is a potential problem with high pressure steel gas pipelines, which commonly use protective coatings and cathodic protection to mitigate corrosion. Surface preparation of the steel surface is critical for protective coating systems as it affects coating adhesion. The level of grit blasting usually specified is that of a minimum 2½ class grit blast, or near “white” grit blasted surface. If the coating develops breaks (“holidays”) the cathodic protection system protects the exposed steel substrate. However cathodic protection can result in disbondment of the coating and produce alkaline conditions, an environment known to be conducive to stress corrosion cracking of steel. The research described in this thesis explored the effect of surface roughness resulting from grit blasting on the stress corrosion cracking susceptibility of API X70 pipeline steel.
School/Discipline
University of South Australia. School of Natural and Built Environments.
School of Natural and Built Environments.
School of Natural and Built Environments.
Dissertation Note
Thesis (PhD(Metallurgy)--University of South Australia, 2007.
Provenance
Copyright 2007 Peter Kentish.
Description
EN-AUS
1 ethesis (xxxii, 266 pages) :
illustrations (some colour), charts.
Includes bibliographical references (pages 213-225)
1 ethesis (xxxii, 266 pages) :
illustrations (some colour), charts.
Includes bibliographical references (pages 213-225)
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506 0#$fstar $2Unrestricted online access