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dc.contributor.authorKunst, Sandra Raquelpt_BR
dc.contributor.authorLudwig, Gustavo Albertopt_BR
dc.contributor.authorCardoso, Henrique Ribeiro Piaggiopt_BR
dc.contributor.authorSantana, Joseane de Andradept_BR
dc.contributor.authorSarmento, Victor Hugo Vitorinopt_BR
dc.contributor.authorMalfatti, Célia de Fragapt_BR
dc.date.accessioned2015-04-24T01:59:05Zpt_BR
dc.date.issued2014pt_BR
dc.identifier.issn1516-1439pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/115570pt_BR
dc.description.abstractThe tetraethoxysilane (TEOS) influences morphological and electrochemical properties of hybrid films by function of concentration. Moreover, the use of acetic acid as a catalyst in the sol enables a more complete hydrolysis of the silane precursors due to the fact that the acetic acid goes through a more complete ionization when in aqueous solution. The aim of this paper is to study the effect of the concentration of tetraethoxysilane (TEOS) on the protective properties of the film on tinplate substrate. The tinplate was coated with a hybrid film obtained from a sol-gel method constituted of the following alkoxide precursors: 3 - (trimetoxisililpropil) methacrylate (TMSM) and poly(methyl methacrylate) PMMA. The effect of tetraethoxysilane (TEOS) concentration has also been evaluated. The films hydrolysis was performed at a pH value of 3.0 using acetic acid as a catalyst. The films were obtained by dip-coating process, cured for 3 hours at 160 °C. The film morphology was evaluated by SEM and profilometry. The electrochemical behavior of the films was evaluated by open circuit potential monitoring, potentiodynamic polarization and electrochemical impedance spectroscopy. The film hydrophobicity was determined by contact angle measurements. The studied films have shown good performance as to corrosion resistance on tinplate. The hybrid film which was obtained through the addition of an excessive amount of TEOS (T3A3) showed increased thickness. Nevertheless, due to an intense densification of the film, promoted by the addition of TEOS, a formation of cracks was registered, thereby compromising the corrosion resistance.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMaterials research : ibero-american journal of materials. São Carlos. Vol. 17, suppl. 1 (Aug. 2014), p. 75-81pt_BR
dc.rightsOpen Accessen
dc.subjectHybrid filmsen
dc.subjectFilmes híbridospt_BR
dc.subjectTinplateen
dc.subjectFolha de flandrespt_BR
dc.subjectResistência à corrosãopt_BR
dc.subjectCorrosionen
dc.titleHybrid films with (trimethoxysilylpropyl) methacrylate (TMSM), poly (Methyl methacrylate) PMMA and tetraethoxysilane (TEOS) applied on tinplatept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000963903pt_BR
dc.type.originNacionalpt_BR


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