Corrosion behavior of micro-arc oxidation film on titanium in simulated body fluid.
- Author:
Gui-lan SUN
1
;
Jian-zhi CHEN
;
Lei WANG
;
Yu-long SHI
Author Information
- Publication Type:Journal Article
- MeSH: Corrosion; Durapatite; chemical synthesis; Electrochemistry; Oxidation-Reduction; Titanium; chemistry
- From: Chinese Journal of Stomatology 2007;42(8):501-504
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the variation of the corrosion resistance of micro-arc oxidation film on titanium by electrochemical methods in simulated body fluid.
METHODSMicro-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.
RESULTSOn 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.
CONCLUSIONSThe results of electrochemical examinations indicate that micro-arc oxidation film increases the corrosion resistance of titanium.