Hydrothermal ageing of X65 steel specimens coated with 100% solids epoxy

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dc.contributor.authorGamboa, E.
dc.contributor.authorConiglio, N.
dc.contributor.authorKurji, R.
dc.contributor.authorCallar, G.
dc.date.issued2013
dc.description.abstractIn some regions of Australia, epoxy-based coatings are commonly used to isolate the outer steel surface of a buried gas pipeline from the aggressive soil environment, but the rate at which the ability of the coating to exclude the environment deteriorates is unknown. The aim of this project was to investigate the accelerated ageing of a pipeline organic coating using a hydrothermal test as a proxy of pipeline's long-term exposure in the field. API-5L-X65 pipeline steel specimens were coated with a commercial 100% solids epoxy coating and immersed into an 80 C distilled water bath with traces of carbonate-bicarbonate salts whilst electrically connected to an aluminium sacrificial anode. A limited number of specimens were taken out at different predefined ageing times, providing data to evaluate the degradation rate of the coating. Samples aged for 28 weeks were found to have a lower Barcol hardness, greater electrical permeability, and lower dry adhesion strength than non-aged samples. © © 2013 Elsevier B.V. All rights reserved.
dc.description.statementofresponsibilityE. Gamboa, N. Coniglio, R. Kurji, G. Callar
dc.identifier.citationProgress in Organic Coatings, 2013; 76(10):1505-1510
dc.identifier.doi10.1016/j.porgcoat.2013.06.002
dc.identifier.issn0300-9440
dc.identifier.urihttp://hdl.handle.net/2440/78803
dc.language.isoen
dc.publisherElsevier Science SA
dc.rights© 2013 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.porgcoat.2013.06.002
dc.subject100% solids epoxy
dc.subjectHydrothermal ageing
dc.subjectX65 pipeline steel
dc.subjectAdhesion strength
dc.subjectElectrochemical behaviour
dc.titleHydrothermal ageing of X65 steel specimens coated with 100% solids epoxy
dc.typeJournal article
pubs.publication-statusPublished

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