Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/9006
Título: | Chitosan-based self-healing protective coatings doped with cerium nitrate for corrosion protection of aluminum alloy 2024 |
Autor: | Carneiro, J. Tedim, J. Fernandes, S. C. M. Freire, C. S. R. Silvestre, A. J. D. Gandini, A. Ferreira, M. G. S. Zheludkevich, M. L. |
Palavras-chave: | Cerium (III) Chitosan Corrosion protection Self-healing AA2024 |
Data: | 2012 |
Editora: | Elsevier |
Resumo: | The good film forming ability, specific solubility and versatile chemical functionalization of chitosan make it a promising candidate for "green" protective coatings. In the present work, these features are exploited together with chitosan high complexing ability to obtain inhibitor-containing anticorrosion coatings for active protection of aluminum alloys. The functionalization of chitosan with fluorinated substituents was also evaluated as a possible route to improve barrier and surface properties of the coating matrix. It was observed that the chitosan layer worked as a reservoir for cationic Ce3+ corrosion inhibitor due to the complexation of Ce3+ with chitosan amino groups, which prevents its uncontrollable and fast leaching. These Ce-containing coatings were found to confer active corrosion protection toward aluminum alloy 2024 as shown by electrochemical impedance spectroscopy. Moreover, the corrosion tests evidence the self-healing ability of prepared chitosan-based "green" protective coatings. The interaction between Ce3+ and chitosan and the concentration effect of the former on the performance of the latter from a corrosion standpoint is also discussed. (C) 2012 Elsevier B.V. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/9006 |
DOI: | 10.1016/j.porgcoat.2012.02.012 |
ISSN: | 0300-9440 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Progress in Organic Coatings 75 (2012) 8– 13.pdf | 913.12 kB | Adobe PDF | ![]() |
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.