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Electrochemical and analytical investigation of passive films formed on stainless steels in alkaline media

2012-10Journal article Restricted access
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dc.contributor.authorFreire, L.
dc.contributor.authorCatarino, Maria Alice
dc.contributor.authorCalheiros Godinho, Maria Isabel
dc.contributor.authorFerreira, M. J.
dc.contributor.authorFerreira, M. G. S.
dc.contributor.authorSimões, A. M. P.
dc.contributor.authorMontemor, M. F.
dc.date.accessioned2015-09-08T14:21:45Z
dc.date.available2015-09-08T14:21:45Z
dc.date.issued2012-10
dc.description.abstractPassive films were grown in potentiodynamic mode, by cyclic voltammetry on AISI 316 and AISI 304 stainless steels. The composition of these films was investigated by X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour and the chemical composition of the passive films formed by cyclic voltammetry were compared to those of films grown under natural conditions (by immersion at open circuit potential, OCP) in alkaline solutions simulating concrete. The study included the effect of pH of the electrolyte and the effect of the presence of chloride ions. The XPS results revealed important changes in the passive film composition, which becomes enriched in chromium and depleted in magnetite as the pH decreases. On the other hand, the presence of chlorides promotes a more oxidised passive layer. The XPS results also showed relevant differences on the composition of the oxide layers for the films formed under cyclic voltammetry and/or under OCP.por
dc.identifier.citationFREIRE, L.; [et al] – Electrochemical and analytical investigation of passive films formed on stainless steels in alkaine media. Cement & Concrete Composites. ISSN: 0958-9465. Vol. 34, nr. 9 (2012), pp. 1075-1081por
dc.identifier.doi10.1016/j.cemconcomp.2012.06.002
dc.identifier.issn0958-9465
dc.identifier.issn1873-393X
dc.identifier.urihttp://hdl.handle.net/10400.21/5102
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier SCI LTDpor
dc.subjectPassive Filmpor
dc.subjectCyclic Voltammetrypor
dc.subjectStainless Steelpor
dc.subjectXPSpor
dc.subjectRing-Disk Electrode
dc.subjectImpedance Spectroscopy
dc.subjectSemiconducting Properties
dc.subjectAlloying Elements
dc.subjectPitting Corrosion
dc.subjectBehavior
dc.subjectIron
dc.subjectMolybdenum
dc.subjectCholorides
dc.subjectLayers
dc.titleElectrochemical and analytical investigation of passive films formed on stainless steels in alkaline mediapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxford
oaire.citation.endPage1081por
oaire.citation.issue9por
oaire.citation.startPage1075por
oaire.citation.titleCement & Concrete Compositespor
oaire.citation.volume34por
person.familyNameCatarino
person.familyNameCalheiros Godinho
person.givenNameMaria Alice
person.givenNameMaria Isabel
person.identifier.orcid0000-0001-7951-5100
person.identifier.orcid0000-0003-3236-1807
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication0a4f5336-9bd0-417e-b603-296cb78e819f
relation.isAuthorOfPublicationec58625e-ce9f-4758-96f2-23ab89d6c032
relation.isAuthorOfPublication.latestForDiscovery0a4f5336-9bd0-417e-b603-296cb78e819f

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