Publicação: Estudo do biomaterial Ti-6Al-4V empregando-se técnicas eletroquímicas e XPS
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Data
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Editor
Sociedade Brasileira de Química
Tipo
Artigo
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Acesso aberto
Resumo
The Ti-6Al-4V alloy used as biomaterial has been used over the last years. The literature shows controversies concerning the kind and the chemical composition of the film naturally and elctrochemically formed on the surface of the titanium alloy. The presente work studies the film composition before and after the electrochemical polarization tests using the x Ray photoelectron spectroscopy (XPS) technique. The results showed that the film naturally formed on the metallic surface is constituted of a variety of oxides which do not cover the whole surface of the metallic alloy and therefore, metallic Ti, Al and V can be found on the uncovered areas. The tests of XPS made after the polarization up to 4V (SCE) showed that the electrochemically formed film is constituted only of TiO2 and that the peak current observed around 1,5 V (SCE) is due to the oxidation of any kind of titanium oxide or the growth of the film.
Descrição
Palavras-chave
titanium, corrosion, XPS, TiO2
Idioma
Português
Como citar
Química Nova. Sociedade Brasileira de Química, v. 25, n. 1, p. 10-14, 2002.
