Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/94794
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUNIVERSIDADE DE ESTADUAL DE CAMPINASpt_BR
dc.typeArtigo de eventopt_BR
dc.titleThe Effect Of The Presence Of Silicone Films On The Corrosion Resistance Of Zn And Znfe Coated Steelpt_BR
dc.contributor.authorSouza M.E.P.pt_BR
dc.contributor.authorAriza E.pt_BR
dc.contributor.authorBallester M.pt_BR
dc.contributor.authorYoshida I.V.P.pt_BR
dc.contributor.authorRocha L.A.pt_BR
dc.contributor.authorFreire C.M.A.pt_BR
unicamp.authorSouza, M.E.P., Department of Materials Engineering, Faculty Mechanical Engineering, UNICAMP, C.P. 6122, 13083-970, Campinas, São Paulo, Brazil, Research Centre on Interfaces and Surfaces Performance, Campus de Azurém, 4800-058, Guimarães, Portugalpt_BR
unicamp.authorBallester, M., Applied Physics Department, Physics Institute, UNICAMP, C.P. 6039, Campinas, São Paulo, Brazilpt_BR
unicamp.authorYoshida, I.V.P., Chemistry Institute, UNICAMP, C.P. 6154, 13083-970, Campinas, São Paulo, Brazilpt_BR
unicamp.authorFreire, C.M.A., Department of Materials Engineering, Faculty Mechanical Engineering, UNICAMP, C.P. 6122, 13083-970, Campinas, São Paulo, Brazilpt_BR
unicamp.author.externalAriza, E., Research Centre on Interfaces and Surfaces Performance, Campus de Azurém, 4800-058, Guimarães, Portugalpt
unicamp.author.externalRocha, L.A., Research Centre on Interfaces and Surfaces Performance, Campus de Azurém, 4800-058, Guimarães, Portugal, Department of Mechanical Engineering, Campus de Azurém, University of Minho, 4800-058, Guimarães, Portugalpt
dc.description.abstractChromatation pre-treatments have been widely used to improve galvanized steel corrosion resistance. However, due to the high toxicity of chromate ions, chromatation pre-treatments tend to be banned and, in last years, alternative coating systems are under investigation. Recently, polysiloxanes have been developed for application as coatings. Among them, and due to their specific properties, such as hardness, chemical resistance and hydrophobicity, silicone resins may be considered as promising substitutes for chromatation pre-treatments. In this work silicone films, obtained from the hydrolysis of a methoxy functional silicone reactive intermediate, were applied on galvanized steel and on steel electroplated with a ZnFe alloy. Electrochemical techniques were used to characterise the degradation behaviour of the samples. These consisted on the monitoring of the open circuit potential (OCP), and on the potentiodynamic polarization of the samples, which was performed in a 3% NaCl aqueous solution. Additionally, electrochemical impedance spectroscopy (EIS) was used as a complementary technique for the evaluation of the corrosion mechanisms of the coating system. SEM and EDS were employed to inspect the surface of the samples before and after the electrochemical tests. EIS data was fitted to an equivalent circuit from which the electrochemical parameters were obtained. Results show the protective character of the resin films, when compared with uncovered specimens. The capacitance of the films increased with the immersion time, in accordance to the behaviour expected for an organic film. The overall performance of the coating systems appears to be highly dependent on the type of metallic coating applied to the steel. During the first three days of immersion the coatings applied upon galvanized steel showed larger |Z| values when compared with those applied to the electroplated steel, indicating a superior corrosion resistance of the former. However, after that time, an abrupt drop of |Z| is observed in the film applied on galvanized steel. In comparison, the coating system involving ZnFe alloy evidences a better stability throughout the immersion time.en
dc.relation.ispartofEUROCORR 2004 - European Corrosion Conference: Long Term Prediction and Modelling of Corrosionpt_BR
dc.date.issued2004pt_BR
dc.identifier.citationEurocorr 2004 - European Corrosion Conference: Long Term Prediction And Modelling Of Corrosion. , v. , n. , p. - , 2004.pt_BR
dc.language.isoenpt_BR
dc.rightsfechadopt_BR
dc.sourceScopuspt_BR
dc.identifier.urlhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84867280581&partnerID=40&md5=f75e5cbc541463d7f08adb85fe344b12pt_BR
dc.date.available2015-06-26T14:25:35Z
dc.date.available2015-11-26T14:15:11Z-
dc.date.accessioned2015-06-26T14:25:35Z
dc.date.accessioned2015-11-26T14:15:11Z-
dc.description.provenanceMade available in DSpace on 2015-06-26T14:25:35Z (GMT). No. of bitstreams: 1 2-s2.0-84867280581.pdf: 463930 bytes, checksum: 73931d1fe307cfbf6afc4fdbf1738c05 (MD5) Previous issue date: 2004en
dc.description.provenanceMade available in DSpace on 2015-11-26T14:15:11Z (GMT). No. of bitstreams: 2 2-s2.0-84867280581.pdf: 463930 bytes, checksum: 73931d1fe307cfbf6afc4fdbf1738c05 (MD5) 2-s2.0-84867280581.pdf.txt: 22056 bytes, checksum: fcdb79dc84746b4b07dda560ed794783 (MD5) Previous issue date: 2004en
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/94794
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/94794-
dc.identifier.idScopus2-s2.0-84867280581pt_BR
dc.description.referenceCabral, E.R., Mannheimen, W.A., (1979) Galvanização, Sua Aplicação Em Equipamentos Elétricos, p. 37. , 1st ed. Ed. Ao livro técnico S/A, Indústria e comércio, Rio de Janeiropt_BR
dc.description.referenceJones, D.A., (1996) Principles and Prevention of Corrosion, p. 477. , 2nd ed. Prentice-Hall Inc, USApt_BR
dc.description.referenceChild, T.F., Van Ooij, W.J., (1999) Trans IMF, 77, p. 64pt_BR
dc.description.referenceBeccaria, A.M., Padeletti, G., Montesperelli, G., Chiaruttini, L., (1999) Surface & Coatings Technology, 111, p. 240pt_BR
dc.description.referenceBaney, R.H., Itoh, M., Sakakibara, A., Susuki, T., (1995) Chemical Reviews, 95, p. 1409pt_BR
dc.description.referenceArkles, B., (2001) MRS Bulletins, p. 402. , Maypt_BR
dc.description.reference(1996) Eureka Transfer Technology, p. 28. , Februarypt_BR
dc.description.referenceBonora, P., Deflorian, F., Fedrizzi, L., (1996) Electrochimica ACTA, 41, p. 1073pt_BR
dc.description.referenceBajat, J.B., Miskovic-Stankovic, V.B., Kacarevic-Popovic, Z., (2003) Progress in Organic Coatings, 47, p. 49pt_BR
dc.description.referenceMcIntyre, J.M., Pham, H.Q., (1996) Progress in Organic Coatings, 27, p. 201pt_BR
dc.description.referenceTsai, C.H., Mansfeld, F., (1993) Corrosion, 49, p. 746pt_BR
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-84867280581.pdf453.06 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.