Adhesion enhancement of powder coatings on galvanised steel by addition of organo-modified silica particles

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Show simple item record Puig, M. Cabedo, L. Gracenea, J.J. Jiménez Morales, Antonia Gámez-Pérez, J. Suay, J.J. 2014-05-15T11:15:34Z 2014-05-15T11:15:34Z 2014-08
dc.identifier.bibliographicCitation Progress in Organic Coatings (2014), 77(8), 1309-1315
dc.identifier.issn 0300-9440
dc.description.abstract The addition of organo-modified silica particles (OSP) to organic monolayer coatings has been investi-gated as an alternative to the use of primers or surface pretreatments in galvanised steel substrates. Acommercial additive consisting of trifunctional organosilane (alkyl-triethoxysilane) grafted on silica par-ticles was directly incorporated at different concentrations (1, 2.5, 3.5 and 4.5 wt%) as an integral additivein a polyester powder coating. The OSP were characterised physicochemically by means of FTIR and TGA,and the coating formulated by DSC. The anticorrosive properties of the systems were evaluated by meansof electrochemical impedance spectroscopy (EIS), showing improvements with all the formulations con-taining the OSP, especially in the coating with 2.5% OSP. In order to explain this behaviour, morphological(using SEM) and adhesion studies were done. The formation of agglomerates in the powder coatings wasdetected when the concentration was over 2.5%. There was an improvement in the adhesion of the coat-ing to the substrate for all the samples containing the OSP but especially for that containing 2.5%. Theimpact resistance was increased too, especially in the formulations with 2.5% and 3.5%.
dc.description.sponsorship This work has been financially supported by the Spanish Ministry of the Economy and Competitiveness and the ERDF (Project IPT-020000-2010-1).
dc.format.extent 7
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2014 Elsevier B.V.
dc.subject.other Powder coating
dc.subject.other Corrosion
dc.subject.other Adhesion
dc.subject.other Organosilane
dc.subject.other Monolayer
dc.subject.other Silica
dc.title Adhesion enhancement of powder coatings on galvanised steel by addition of organo-modified silica particles
dc.type article PeerReviewed
dc.description.status Publicado
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi 10.1016/j.porgcoat.2014.03.017
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1309
dc.identifier.publicationissue 8
dc.identifier.publicationlastpage 1315
dc.identifier.publicationtitle Progress in organic coatings
dc.identifier.publicationvolume 77
dc.identifier.uxxi AR/0000014865
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