resumo
The electrochemical co-deposition of Al-Ce metallic protective coating with active inhibiting effect was performed for the first time using an ionic liquid as an electrolyte. Cerium was successfully co-deposited with aluminium on surface of Pt and AA2024 aluminium alloy forming uniform films with globular micro-structure and thickness up to 75 mu m. Cerium was introduced into the aluminium coating as a potential corrosion inhibitor which can be liberated during sacrificial dissolution of the galvanic layer deposited on the alloy surface. The released inhibitor provides an additional active corrosion protection slowing down the corrosion processes in the defects. (C) 2010 Elsevier B.V. All rights reserved.
palavras-chave
ALUMINUM; CORROSION; CHLORIDE; METALS; CERIUM
categoria
Electrochemistry
autores
Lisenkov, A; Zheludkevich, ML; Ferreira, MGS
nossos autores
Aleksey Lisenkov
Bolseiro de pós-Doutoramento
Mário Guerreiro Silva Ferreira
Professor Catedrático
Mikhail Zheludkevich
Investigador Principal ConvidadoProjectos
RMNE-UA-National Network of Electron Microscopy (REDE/1509/RME/2005 )
Self-healing protective coating with "intelligent" nanoreservoirs of corrosion inhibitors (PTDC/CTM/65632/2006)
agradecimentos
The financial support of the Portuguese Foundation for Science and Technology (FCT) in frame of REDE/1509/RME/2005 and PTDC/CTM/65632/2006 projects is gratefully acknowledged.