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Corrosion behavior of micro-arc oxidation film on titanium in simulated body fluid / 中华口腔医学杂志
Chinese Journal of Stomatology ; (12): 501-504, 2007.
Artigo em Chinês | WPRIM | ID: wpr-359712
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the variation of the corrosion resistance of micro-arc oxidation film on titanium by electrochemical methods in simulated body fluid.</p><p><b>METHODS</b>Micro-arc oxidation film was formed on the titanium surface using micro-arc oxidation. The morphology was observed with scanning electron microscopy (SEM) and the phase composition was analyzed using X-ray diffraction (XRD). Polarization curves and electrochemical impedance spectroscopy (EIS) in simulated body fluid were examined with electrochemical methods.</p><p><b>RESULTS</b>On the titanium surface with micro-arc oxidation, the film consisted of many volcanic micropores. The film formed was a titanium dioxide (TiO(2)) with peaks for both anatase and rutile phases. In addition, hydroxylapatite was also observed. The self-corrosion potential and self-corrosion current density of titanium with micro-arc oxidation film were -0.255 V and 0.80 microA/cm(2) respectively, while those of untreated titanium were -0.358 V and 0.55 microA/cm(2). Electrochemical impedance spectroscopy confirmed the model of equivalent circuits reasonable.</p><p><b>CONCLUSIONS</b>The results of electrochemical examinations indicate that micro-arc oxidation film increases the corrosion resistance of titanium.</p>
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Oxirredução / Titânio / Química / Durapatita / Corrosão / Eletroquímica Idioma: Chinês Revista: Chinese Journal of Stomatology Ano de publicação: 2007 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Oxirredução / Titânio / Química / Durapatita / Corrosão / Eletroquímica Idioma: Chinês Revista: Chinese Journal of Stomatology Ano de publicação: 2007 Tipo de documento: Artigo