KELLIE PROVAZI DE SOUZA
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Artigo IPEN-doc 23218 Passivation of electrogalvanized steel with conversion coatings in Cr VI-free solutions2012 - SOUZA, KELLIE P. de; TOMACHUK, CELIA R.; PALOMINO, LUIS E.M.; COSTA, ISOLDAArtigo IPEN-doc 23112 Study of zirconium addition on Cr VI-free passivating layers applied on zinc coated steel2012 - SOUZA, KELLIE P. de; TOMACHUK, CELIA R.; PALOMINO, LUIS E.M.; COSTA, ISOLDAArtigo IPEN-doc 22645 Corrosion protection of electrogalvanized steel by surface treatments containing cerium and niobium compounds2016 - FERREIRA JUNIOR, J.M.; SOUZA, K.P.; ROSSI, J.L.; COSTA, I.; TRINDADE, G.F.; TAMACHUK, C.R.In this work, new surface treatments for the corrosion protection of electrogalvanized steel have been evaluated. The aim was to search for chromium free treatments to replace those based on hexavalent chromium. Surface films were obtained by immersion in solutions containing salts for increasing conductivity, coating forming salts (i.e. cerium nitrate and niobium oxalate ammonium) and an organic complexing agent (2-butyne 1,4 diol propoxylate). The morphology and composition of the surface films formed were characterized by scanning electron microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS). The corrosion resistance of the treated surfaces was evaluated by electrochemical impedance spectroscopy (EIS) and their chemical composition was characterized by XPS. It was found that it consists of an organic coating with cerium incorporated. The electrochemical results suggested surface film increased the corrosion resistance of the electrogalvanized steel and similar protection properties to that of a chromate coating were indicatedArtigo IPEN-doc 22456 Tratamentos para proteção à corrosão de aços galvanizados2015 - TOMACHUK, CELIA R.; COSTA, ISOLDA; SOUZA, KELLIE P. deArtigo IPEN-doc 22402 Electrochemical and chemical characterization of electrodeposited zinc surface exposed to new surface tratments2016 - FERREIRA JUNIOR, J.M.; SOUZA, K.P.; QUEIROZ, F.M.; COSTA, I.; TOMACHUK, C.R.Artigo IPEN-doc 20501 Avaliação da resistência à corrosão do aço eletrozincado revestido com camada de conversão de cério E 2-butino-1,4-diol propoxilato2014 - PROVAZI, K.; TOMACHUK, C.R.; JUNIOR, J.M.F.; COSTA, I.Resumo IPEN-doc 12540 Estudos de deposição eletroforetica de YSZ para aplicacoes em celulas a combustivel do tipo SOFC2006 - USSUI, V.; SOUZA, K.P.; YOSHITO, W.K.; LIMA, N.B.; LAZAR, D.R.R.; PASCHOAL, J.O.A.Artigo IPEN-doc 12596 Filme anodico sobre aluminio como matriz para preparação eletroquimica de nanofios de ferro2006 - PROVAZI, K.; PESSINE, E.J.Artigo IPEN-doc 18377 Influência dos parâmetros de eletrodeposição na recuperação de metais de pilhas e baterias exauridas2012 - PROVAZI, K.; ESPINOSA, D.C.R.; TENÓRIO, J.A.S.Artigo IPEN-doc 10513 A implantacao de ferro por eletrodeposicao no filme de Alsub(2)Osub(3) crescido por anodizacao2004 - PROVAZI, K.; SATO, I.M.; SALVADOR, V.L.R.; PESSINE, E.J.