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A review of techniques for the monitoring of cathodic shielding and corrosion under disbonded coatings
conference contribution
posted on 2013-01-01, 00:00 authored by Bob VarelaBob Varela, Mike Yongjun TanMike Yongjun Tan, Maria ForsythMaria Forsyth, Bruce HintonBruce Hinton, C BonarThe mitigation of external corrosion of energy pipelines by a combination of barrier coatings and Cathodic Protection (CP) is not always effective. Even when design specifications are properly met, the shielding of cathodic protection current from reaching steel surface by disbonded barrier coatings, often referred to as cathodic shielding, may lead to severe corrosion problems such as deep pitting, high and near neutral pH Stress Corrosion Cracking (SCC) and Microbiologically Induced Corrosion (MIC). Unfortunately, current indirect assessment methods used in the pipeline industry have serious difficulties in detecting such corrosion problems. This paper provides a brief review of current techniques and their limitations when being applied under complex buried pipeline environmental conditions. The main purpose is to identify potential methods that could be utilised in the design of new monitoring probes specific for the monitoring of cathodic shielding and corrosion of disbonded coatings in the pipeline industry.
History
Event
Australasian Corrosion Association. Conference (2013 : Brisbane, Queensland)Pagination
522 - 530Publisher
Australasian Corrosion AssociationLocation
Brisbane, QueenslandPlace of publication
[Brisbane, Qld.]Start date
2013-11-10End date
2013-11-13ISBN-13
9781634394369Language
engPublication classification
E1.1 Full written paper - refereedCopyright notice
2013, Australasian Corrosion AssociationEditor/Contributor(s)
[Unknown]Title of proceedings
Corrosion and Prevention 2013 : Proceedings of the Annual Conference of the Australasian Corrosion AssociationUsage metrics
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