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An overview of recent progresses in probing and understanding corrosion under disbonded coatings
journal contribution
posted on 2023-03-22, 03:17 authored by Mike Yongjun TanMike Yongjun Tan, F Bob Varela, Ying HuoYing HuoCorrosion under disbonded coatings (CUDC) remains a major unsolved issue and a prime risk to underground steel structures such as buried gas pipelines. CUDC could not be effectively mitigated by conventional cathodic protection (CP) or be detected through usual inspection and survey technologies due to CP shielding. This article provides a brief review of recent progresses made through laboratory and field probing of CUDC and its influence factors. Discussions on CUDC processes and mechanisms are made based on results from an extensive laboratory and field-testing program using electrode array-based corrosion probes. It is shown that CUDC is affected not only by well-known factors such as the CP level, but also by coating disbondment geometry and soil conditions especially the seasonal dry-wet changes in soil saturation status. These findings have led to improved understanding of CUDC, and could lead to the development of better CUDC mitigation and control methods.
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Journal
Corrosion Engineering Science and TechnologyVolume
ahead-of-printPagination
1-10Location
London, Eng.Publisher DOI
ISSN
1478-422XeISSN
1743-2782Language
enPublication classification
C1 Refereed article in a scholarly journalIssue
ahead-of-printPublisher
Informa UK LimitedUsage metrics
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