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Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis

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dc.contributor.authorAcciari, H. A.
dc.contributor.authorGuastaldi, Antonio Carlos [UNESP]
dc.contributor.authorBrett, CMA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Coimbra
dc.date.accessioned2014-05-20T14:17:58Z
dc.date.available2014-05-20T14:17:58Z
dc.date.issued2005-03-01
dc.description.abstractThe corrosion resistance of three of the constituent phases in high copper dental amalgams has been investigated by electrochemical methods in 0.9% NaCl solution. Polarization curves show corrosion potentials most positive for gamma(1)-Ag2Hg3, followed by Ag-Cu, and gamma-Ag3Sn in agreement with the order of corrosion resistance deduced from the corrosion currents. Complex plane impedance plots at the open circuit potential showed distorted semicircles with diffusional components at low frequency for Ag-Hg and Ag-Cu, while for gamma-Ag3Sn a layer of corrosion products is formed, partially or completely covering the surface of the electrode. Impedance and noise spectra have been compared in the frequency domain, and show good agreement. (C) 2004 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUNESP, Dept Quim Fis, Inst Quim, Araraquara, SP, Brazil
dc.description.affiliationUniv Coimbra, Dept Quim, P-3004535 Coimbra, Portugal
dc.description.affiliationUnespUNESP, Dept Quim Fis, Inst Quim, Araraquara, SP, Brazil
dc.format.extent635-647
dc.identifierhttp://dx.doi.org/10.1016/j.corsci.2004.07.004
dc.identifier.citationCorrosion Science. Oxford: Pergamon-Elsevier B.V., v. 47, n. 3, p. 635-647, 2005.
dc.identifier.doi10.1016/j.corsci.2004.07.004
dc.identifier.issn0010-938X
dc.identifier.lattes6443430122330366
dc.identifier.urihttp://hdl.handle.net/11449/25398
dc.identifier.wosWOS:000226769300008
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofCorrosion Science
dc.relation.ispartofjcr4.862
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectdental amalgamspt
dc.subjectamalgam phasespt
dc.subjectelectrochemical impedance spectroscopy (EIS)pt
dc.subjectelectrochemical noise analysispt
dc.subjectchloride corrosionpt
dc.titleCorrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysisen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
unesp.author.lattes6443430122330366[2]
unesp.author.orcid0000-0002-6433-3555[2]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentFísico-Química - IQARpt

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Araraquara - IQAR - Instituto de Química