Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2633
Título: Synergistic protection against corrosion of AA2024-T3 by sol-gel coating modified with La and Mo-enriched zeolites
Autor: Dias, Susana
Lamaka, S. V.
Diamantino, Teresa C.
Ferreira, M. G. S.
Palavras-chave: Materials
Sol-gel coatings
Electrochemical impedance spectroscopy
Data: 2014
Editora: The Electrochemical Society
Citação: Dias, S.A.S.; Lamaka, S.V.; Diamantino, T.C.; Ferreira, M.G.S. - Synergistic protection against corrosion of AA2024-T3 by sol-gel coating modified with La and Mo-enriched zeolites. In: Journal of The Electrochemical Society, 2014, Vol. 161, nº 4, p. C215-C222
Resumo: The present work demonstrates an improvement in corrosion protection of sol-gel coatings modified with a mixture of lanthanum and molybdate-enriched zeolite microparticles (La+Mo) due to synergistic effect between lanthanum and molybdate. The effect of these inhibitor species on protection of AA2024-T3 substrate has been studied by Electrochemical Impedance Spectroscopy and Localized Electrochemical Impedance Spectroscopy. Both techniques revealed an enhanced protection when compared with the case where the inhibitors were used alone. The inhibiting mechanism could involve on demand release of molybdate and lanthanum ions from the loaded zeolite followed by the formation of molybdenum oxide/hydroxide and a Mo-Na-La compound on intermetallic particles.
URI: http://hdl.handle.net/10400.9/2633
ISSN: 0013-4651
Versão do Editor: http://dx.doi.org/10.1149/2.064404jes
Aparece nas colecções:ME - Artigos em revistas internacionais

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