Corrosion protection of chromium-coated steel by hybrid sol-gel coatings

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dc.contributor.authorSuzana, Ana F. [UNESP]
dc.contributor.authorFerreira, Elivelton A. [UNESP]
dc.contributor.authorBenedetti, Assis V. [UNESP]
dc.contributor.authorCarvalho, Hudson W. P. [UNESP]
dc.contributor.authorSantilli, Celso V. [UNESP]
dc.contributor.authorPulcinelli, Sandra H. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-11-27T16:55:45Z
dc.date.available2018-11-27T16:55:45Z
dc.date.issued2016-08-15
dc.description.abstractThe aim of this study was to investigate the effect of the amount of tetraethyl orthosilicate (TEOS) on the corrosion protection of chromium-coated steel (CCS) by poly(methyl methacrylate)-co-(trimethoxysilyl)propyl methacrylate (PMMA-co-TMSM) coatings in aerated and unstirred solutions containing 2 wt% NaCl and acetic add, at pH around 3.5. The MMA/Si molar ratios in the hybrid materials were adjusted to 10, 3, and 1 by adding different amounts of TEOS, producing materials denoted PMMA-Sil-10, PMMA-Sil-3, and PMMA-Sil-1, respectively. Scanning electron microscopy (SEM) images showed that the PMMA-Sil-10 and PMMA-Sil-3 hybrid coatings were homogeneous. These hybrids were submitted to 21 days of submersion in the same solution used to perform the electrochemical measurements, and their structural profiles investigated. Si-29 NMR results showed that hydrolysis and condensation reactions took place during the immersion treatment and provided further reinforcement of the siloxane network, which could enhance protection against corrosion. Furthermore the synthesis method enabled the close control of the inorganic phase content of the PMMA-RSiO3/2 hybrids. Electrochemical analysis demonstrated that the PMMA-Sil-3 coating remained on the metallic substrate for a prolonged period, providing high protection against corrosion due to the controlled TEOS content of the hybrid material. (C) 2016 Elsevier B.V. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Quim, Araraquara, SP, Brazil
dc.description.affiliationUniv Fed Fluminense, Inst Ciencias Exatas, Dept Quim, Volta Redonda, RJ, Brazil
dc.description.affiliationUniv Sao Paulo, Ctr Energia Nucl Agr, POB 96, BR-13400970 Piracicaba, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
dc.description.sponsorshipIdFAPESP: Process 2013/01078-3
dc.description.sponsorshipIdCNPq: Process 305890/2010-7
dc.description.sponsorshipIdFAPERJ: Process E-26/111.368/2014
dc.format.extent71-80
dc.identifierhttp://dx.doi.org/10.1016/j.surfcoat.2016.04.075
dc.identifier.citationSurface & Coatings Technology. Lausanne: Elsevier Science Sa, v. 299, p. 71-80, 2016.
dc.identifier.doi10.1016/j.surfcoat.2016.04.075
dc.identifier.fileWOS000378664900010.pdf
dc.identifier.issn0257-8972
dc.identifier.lattes5584298681870865
dc.identifier.orcid0000-0002-8356-8093
dc.identifier.urihttp://hdl.handle.net/11449/165216
dc.identifier.wosWOS:000378664900010
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofSurface & Coatings Technology
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectTetraethyl orthosilicate
dc.subjectPoly(methyl methacrylate)-co-(trimethoxysilyl)propyl methacrylate
dc.subjectChromium-coated steel
dc.subjectCorrosion
dc.subjectHybrid coating
dc.titleCorrosion protection of chromium-coated steel by hybrid sol-gel coatingsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes1769008264876945[3]
unesp.author.lattes5584298681870865[5]
unesp.author.orcid0000-0002-0243-6639[3]
unesp.author.orcid0000-0002-8356-8093[5]

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Artigos - Físico Química - IQ