resumo
In this work, layered double hydroxide (LDH) conversion films were grown on aluminium alloy 2024 substrates. The effect of experimental conditions on the growth of LDH conversion films, including concentration of reactants and presence of corrosion inhibitor, was investigated. The protective performance provided by LDH films was assessed by electrochemical impedance spectroscopy (EIS), and rationalised in terms of structural and morphological characteristics surveyed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The results show that corrosion protection increases when corrosion inhibitors (vanadates) are intercalated in LDHs and dilute solutions of Zn2+ are used to grow LDHs, (C) 2013 Elsevier Ltd. All rights reserved.
palavras-chave
ALUMINUM-ALLOY; MG ALLOY; COATINGS; INHIBITION; RESISTANCE; CHITOSAN; NANOCONTAINERS
categoria
Electrochemistry
autores
Tedim, J; Zheludkevich, ML; Bastos, AC; Salak, AN; Lisenkov, AD; Ferreira, MGS
nossos autores
Aleksey Lisenkov
Bolseiro de pós-Doutoramento
Andrei Salak
Investigador
António Alexandre Cunha Bastos
Investigador
João Tedim
Professor Auxiliar
Mário Guerreiro Silva Ferreira
Professor Catedrático
Mikhail Zheludkevich
Investigador Principal ConvidadoProjectos
Multifunctional nanostructured conversion films based on Layered Double hydroxides for corrosion protection of aeronautical structures (PTDC/CTM-MAT/1515/2012)
Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2013-2014) (PEst-C/CTM/LA0011/2013)
agradecimentos
The authors thank FCT for funding through the project with reference PTDC/CTM-MAT/1515/2012 and CICECO (ref. PEst-C/CTM/LA0011/2013).