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https://hdl.handle.net/1822/15759
Título: | Effect of Al2Cu precipitates size and mass transport on the polarisation behaviour of age-hardened Al–Si–Cu–Mg alloys in 0.05M NaCl |
Autor(es): | Vieira, A. C. Pinto, A. M. Rocha, L. A. Mischler, S. |
Palavras-chave: | Oxygen reduction Al2Cu precipitates Mass transport Age-hardened Al-Si-Cu-Mg Al Cu precipitates 2 |
Data: | 2011 |
Editora: | Pergamon Press |
Revista: | Electrochimica Acta |
Citação: | Vieira, A.C.; Pinto, A.M.; Rocha, L.A.; Mischler, S.Effect of Al2Cu precipitates size and mass transport on the polarisation behaviour of age-hardened Al–Si–Cu–Mg alloys in 0.05M NaCl, Electrochimica Acta, 56, 11, 3821-3828, 2011. |
Resumo(s): | The electrochemical behaviour of age-hardened Al–Si–Cu–Mg alloys was investigated in a 0.05 M NaCl solution under controlled mass transport conditions using a rotating disk electrode. This work aimed at getting better understanding of the effect of the alloy microstructure, in particular the size distribution of Al2Cu phase, on the corrosion behaviour of the alloy. Three different size distributions of the Al2Cu phase were obtained through appropriate heat treatments. The cathodic reduction of oxygen was found to occur mainly on the Al2Cu phases acting as preferential cathodes. Small sized Al2Cu phases were found to promote at high rotation rates a transition from a 4 electron to a 2 electron dominated oxygen reduction mechanisms. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/15759 |
DOI: | 10.1016/j.electacta.2011.02.044 |
ISSN: | 0013-4686 |
Acesso: | Acesso aberto |
Aparece nas coleções: | CIICS - Artigos em revistas de circulação internacional com arbitragem científica CT2M - Artigos em revistas de circulação internacional com arbitragem científica |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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EA_16785.pdf | 1,97 MB | Adobe PDF | Ver/Abrir |