The characterisation of the protective film formed by benzotriazole on the 90/10 copper-nickel alloy surface in H2SO4 media

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dc.contributor.authorMaciel, Jose Maria
dc.contributor.authorVera Villamil Jaimes, Ruth Flavia
dc.contributor.authorCorio, Paola
dc.contributor.authorRubim, Joel Camargo
dc.contributor.authorVolpe, Pedro Luis
dc.contributor.authorAgostinho Neto, Augusto [UNESP]
dc.contributor.authorLeite Agostinho, Silvia Maria
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)
dc.contributor.institutionUniversidade de Brasília (UnB)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:31:16Z
dc.date.available2014-05-20T15:31:16Z
dc.date.issued2008-03-01
dc.description.abstractThe nature of the protective film formed by benzotriazole (BTAH) on the surface of the 90/10 CuNi alloy in deaerated 0.5 mol L-1 H2SO4 solution containing Fe(III) ions as oxidant was investigated by weight-loss, calorimetric measurements, and by surface-enhanced Raman spectroscopy (SERS). The SERS measurements show that the protective film is composed by the [Cu(I)BTA](n), polymeric complex and that the BTAH molecules are also adsorbed on the electrode surface. A modification of the BET isotherm for adsorption of gases ill solids is proposed to describe the experimental results obtained from weight-loss experiments that suggest an adsorption in multilayers. Electrochemical studies of copper and nickel in 0.5 mol L-1 H2SO4 in presence and absence of BTAH have also been made as an aid to interpret the results. The calculated adsorption free energy of the cuprous benzotriazolate on the surface of the alloy is in accordance with the value for pure copper. (C) 2007 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv São Paulo, Inst Quim, BR-05508990 São Paulo, Brazil
dc.description.affiliationUniversidade Estadual de Ponta Grossa (UEPG), Dept Quim, BR-84030900 Ponta Grossa, PR, Brazil
dc.description.affiliationUniversidade de Brasilia (UnB), Inst Quim, BR-07091997 Brasilia, DF, Brazil
dc.description.affiliationUniv Estadual Campinas, Inst Quim, BR-05509900 Campinas, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.format.extent879-886
dc.identifierhttp://dx.doi.org/10.1016/j.corsci.2007.10.011
dc.identifier.citationCorrosion Science. Oxford: Pergamon-Elsevier B.V. Ltd, v. 50, n. 3, p. 879-886, 2008.
dc.identifier.doi10.1016/j.corsci.2007.10.011
dc.identifier.issn0010-938X
dc.identifier.urihttp://hdl.handle.net/11449/40452
dc.identifier.wosWOS:000254665500029
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofCorrosion Science
dc.relation.ispartofjcr4.862
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbenzotriazoleen
dc.subjectcopper-nickel alloysen
dc.subjectcorrosion inhibitorsen
dc.subjectRaman spectroscopyen
dc.subjectadsorption isothermsen
dc.titleThe characterisation of the protective film formed by benzotriazole on the 90/10 copper-nickel alloy surface in H2SO4 mediaen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd

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