Localised corrosion assessement of crambe-oil-based polyurethane coatings applied on the ASTM 1200 aluminum alloy

dc.contributor.authorNardeli, J. V. [UNESP]
dc.contributor.authorSnihirova, D. V.
dc.contributor.authorFugivara, C. S. [UNESP]
dc.contributor.authorMontemor, M. F.
dc.contributor.authorPinto, E. R.P. [UNESP]
dc.contributor.authorMessaddecq, Y. [UNESP]
dc.contributor.authorBenedetti, A. V. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de Lisboa
dc.date.accessioned2018-12-11T17:03:51Z
dc.date.available2018-12-11T17:03:51Z
dc.date.issued2016-10-01
dc.description.abstractCoatings composed of polyurethanes derived from polyesters of crambe oil and pre-polymer obtained from hexamethylene diisocyanate and castor oil were prepared (1:2 and 1:3, respectively) and applied on the Al alloy 1200. The corrosion resistance of the coated panels was studied by linear polarization and conventional electrochemical impedance (EIS). The fraction of an active area of the substrate was around 0.017% and 0.013% for the 1:2 and 1:3 coatings, respectively. The performance of pristine samples was also studied by electrochemical impedance spectroscopy. An artificial scratch was performed on pristine samples and the local corrosion activity was studied by localized impedance spectroscopy (LEIS) and scanning vibrating electrode technique (SVET) in NaCl solutions. Filiform corrosion was observed for the panel coated with the modified polyester and pre-polymer 1:3 after 12 h of test. The scratched sample of modified polyester and pre-polymer 1:2 showed better performance in NaCl solution and the coating seems to present a self-healing response to the artificial damage.en
dc.description.affiliationDepartamento de Físico-Química Instituto de Química Universidade Estadual Paulista UNESP
dc.description.affiliationCQE – DEQ Instituto superior Técnico Universidade de Lisboa, Av. Rovisco Pais
dc.description.affiliationUnespDepartamento de Físico-Química Instituto de Química Universidade Estadual Paulista UNESP
dc.format.extent422-435
dc.identifierhttp://dx.doi.org/10.1016/j.corsci.2016.05.034
dc.identifier.citationCorrosion Science, v. 111, p. 422-435.
dc.identifier.doi10.1016/j.corsci.2016.05.034
dc.identifier.file2-s2.0-84976542404.pdf
dc.identifier.issn0010-938X
dc.identifier.scopus2-s2.0-84976542404
dc.identifier.urihttp://hdl.handle.net/11449/173150
dc.language.isoeng
dc.relation.ispartofCorrosion Science
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAluminium alloy
dc.subjectEIS, SEM, Polymer coatings
dc.subjectOrganic coatings
dc.subjectScratching electrode
dc.titleLocalised corrosion assessement of crambe-oil-based polyurethane coatings applied on the ASTM 1200 aluminum alloyen
dc.typeArtigo
unesp.author.lattes1769008264876945[7]
unesp.author.lattes2797127887030838[3]
unesp.author.orcid0000-0002-0243-6639[7]
unesp.author.orcid0000-0002-2288-2601[3]

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