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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Electrosynthesized polyaniline for the corrosion protection of aluminum alloy 2024-T3

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Autor(es):
Domingo Huerta-Vilca ; Sandra R. Moraes ; Artur J. Motheo
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: Journal of the Brazilian Chemical Society; v. 14, n. 1, p. -, Jan. 2003.
Resumo

Adherent polyaniline films on aluminum alloy 2024-T3 have been prepared by electrodeposition from aniline containing oxalic acid solution. The most appropriate method to prepare protective films was a successive galvanostatic deposition of 500 seconds. With this type of film, the open circuit potential of the coating shifted around 0.065V vs. SCE compared to the uncoated alloy. The polyaniline coatings can be considered as candidates to protect copper-rich (3 - 5%) aluminum alloys by avoiding the galvanic couple between re-deposited copper on the surface and the bulk alloy. The performance of the polyaniline films was verified by immersion tests up to 2.5 months. It was good with formation of some aluminum oxides due to electrolyte permeation so, in order to optimize the performance a coating formulation would content an isolation topcoat. (AU)

Processo FAPESP: 99/11621-7 - Estudo sobre o uso de filmes de polianilinas como protetores de aços alumínio e ligas de alumínio frente a processos de corrosão
Beneficiário:Artur de Jesus Motheo
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 00/02674-9 - Domingo Huerta Vilca | Dechema e. V. Frankfurt am Main - Alemanha
Beneficiário:Artur de Jesus Motheo
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional