Sun Gui-lan, Wang Lei
Department of Prosthodontics, The Affiliated Hospital of Qingdao University Medical College, Qingdao 266003, Shandong Province, China.
Shanghai Kou Qiang Yi Xue. 2007 Jun;16(3):295-8.
To examine the corrosion resistance of micro-arc oxidation film on titanium by electrochemical methods in simulated body fluid.
Micro-arc oxidation film was formed on titanium surface by using micro-arc oxidation. The morphology, phase composition and the surface roughness were observed by scanning electron microscopy (SEM), X-ray diffraction(XRD) and profilemeter, respectively. Polarization curves in simulated body fluid was examined by electrochemical methods. SPSS11.0 software package was used for one-way ANOVA.
On titanium surface with micro-arc oxidation, the film was consisted of many volcanic microporous, about 0.1microm -5microm in diameter. The film formed was a titanium oxide (TiO(2)) with peaks for both anatase and rutile phases, in addition, hydroxylapatite was also observed. Roughness increased on titanium surface. The self-corrosion potential and self-corrosion current density of titanium with micro-arc oxidation film were -0.255V and 0.80microA/cm(2) respectively, while those of untreated titanium were -0.358V and 0.55microA/cm(2).
The results of electrochemical examinations indicate that micro-arc oxidation film increases the corrosion resistance of titanium.
通过电化学方法在模拟体液中检测钛表面微弧氧化膜的耐腐蚀性。
采用微弧氧化在钛表面形成微弧氧化膜。分别用扫描电子显微镜（SEM）、X射线衍射仪（XRD）和表面轮廓仪观察膜的形貌、相组成及表面粗糙度。用电化学方法检测模拟体液中的极化曲线。采用SPSS11.0软件包进行单因素方差分析。
在经过微弧氧化处理的钛表面，膜由许多火山状微孔组成，直径约为0.1微米至5微米。形成的膜是一种氧化钛（TiO₂），同时存在锐钛矿相和金红石相的峰，此外还观察到了羟基磷灰石。钛表面粗糙度增加。有微弧氧化膜的钛的自腐蚀电位和自腐蚀电流密度分别为-0.255V和0.80微安/平方厘米，而未处理钛的分别为-0.358V和0.55微安/平方厘米。
电化学检测结果表明微弧氧化膜提高了钛的耐腐蚀性。
