Show simple item record

dc.contributor.authorDe Marco, Roland
dc.contributor.authorJIang, Zhong-tao
dc.contributor.authorJohn, Doug
dc.contributor.authorSercombe, Matthew
dc.contributor.authorKinsella, Brian
dc.date.accessioned2017-01-30T13:21:31Z
dc.date.available2017-01-30T13:21:31Z
dc.date.created2008-11-12T23:32:25Z
dc.date.issued2007
dc.identifier.citationDe Marco, Roland and JIang, Zhong-tao and John, Doug and Sercombe, Matthew and Kinsella, Brian. 2007. An in situ electrochemical impedance spectroscopy/synchrotron radiation grazing incidence X-ray diffraction study of the influence of acetate on the carbon dioxide corrosion of mild steel. Electrochimica Acta 52: 3746-3750.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/30786
dc.identifier.doi10.1016/j.electacta.2006.10.048
dc.description.abstract

A combination of electrochemical impedance spectroscopy (EIS) and in situ synchrotron radiation grazing incidence X-ray diffraction (SRGIXRD) has been used to study the influence of acetate on the carbon dioxide corrosion of mild steel. The SR-GIXRD data demonstrated that normal corrosion - in a carbon dioxide saturated brine - induced the formation of a thick corrosion scale of Fe2(OH)2CO3 and Fe2O2CO3, and this totally obscured the -Fe diffraction peaks of the underlying steel substrate after 24 h. On the other hand, the carbon dioxide corrosion of mild steel in the presence of acetate also detected the Bragg diffraction peaks for Fe2(OH)2CO3 and Fe2O2CO3; however, the -Fe diffraction peaks of the underlying steel substrate were not extinguished with time, and there was a reversal in the pattern of evolution of the intensities of the Fe2(OH)2CO3 and Fe2O2CO3 phases in acetate. Accordingly, the EIS data showed a poorly defined medium frequency time constant for the corroded steel specimen in brine spiked with acetate, and this medium frequency time constant was extinguished as a function of time. Alternatively, EIS of the corroded specimen also revealed a medium frequency time constant after 24 h. In addition, EIS complex?plane impedance plots showed that the corroded electrode had become passivated in an acetate-spiked brine, as evidenced by a three-fold enhancement in the charge transfer resistance at low frequency. These EIS/SR-GIXRD outcomes suggest that acetate affects the crystallization chemistry of the Fe2(OH)2CO3/Fe2O2CO3 corrosion scale, and this causes a mild passivation of the corroded steel surface.

dc.publisherPergamon-Elsevier Science Ltd
dc.subjectElectrode dynamics
dc.subjectSynchrotron radiation grazing incidence X-ray diffraction
dc.subjectMild steel
dc.subjectCarbon dioxide corrosion
dc.subjectElectrochemical impedance spectroscopy
dc.titleAn in situ electrochemical impedance spectroscopy/synchrotron radiation grazing incidence X-ray diffraction study of the influence of acetate on the carbon dioxide corrosion of mild steel
dc.typeJournal Article
dcterms.source.volume52
dcterms.source.startPage3746
dcterms.source.endPage3750
dcterms.source.titleElectrochimica Acta
curtin.identifierEPR-1218
curtin.accessStatusFulltext not available
curtin.facultyDepartment of Applied Chemistry
curtin.facultyDivision of Engineering, Science and Computing
curtin.facultyFaculty of Science


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record