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应用阳极氧化和微弧氧化的方法分别制作了TC4(Ti-6Al-4V)表面氧化膜,分别在0.9% NaCl溶液和模拟人工体液中以PTFE盘作摩擦偶件,在圆平动盘销式摩擦磨损试验机进行摩擦电化学试验,获得了对应的摩擦系数,采用三电极体系得到摩擦电化学特性曲线.结果表明,静态时微弧氧化膜耐蚀性比阳极氧化膜提高了近2个数量级;与基体相比,TC4的阳极氧化膜的耐蚀性增强,摩擦系数降低,处理电压越高,摩擦系数越小;虽然TC4的微弧氧化膜的耐腐蚀性能均较阳极氧化膜有大幅度提高,但摩擦系数均较未处理的TC4的摩擦系数大,其中处理时间为20min的微弧氧化膜表现出良好的耐蚀和摩擦性能,通过对磨损试件的SEM形貌对比解释了微弧氧化膜摩擦系数较大的原因,这与膜层表面粗糙度和微孔孔径大小有关.
The surface oxide films of TC4 (Ti-6Al-4V) were respectively fabricated by anodic oxidation and micro-arc oxidation. PTFE plates were used as frictional couplers in 0.9% NaCl solution and simulated artificial body fluids respectively. Friction and wear tester was used to conduct the friction electrochemistry test, the corresponding friction coefficient was obtained, and the tri-electrode system was used to obtain the triboelectrochemical characteristic curve.The results show that the corrosion resistance of the micro-arc oxidation film is about 2 orders of magnitude higher than that of the anodic oxide film Compared with the matrix, the corrosion resistance of the anodic oxide film of TC4 is enhanced, the friction coefficient is decreased, the higher the treatment voltage is, the smaller the friction coefficient is. Although the corrosion resistance of the TC4 microarc oxide film is significantly higher than that of the anodic oxide film , But the coefficient of friction is higher than that of the untreated TC4. The micro-arc oxidation film with the treatment time of 20 min shows good corrosion resistance and friction performance. By comparing the SEM morphology of the worn specimen with the micro-arc Oxide film larger friction coefficient, which is related to the film surface roughness and pore size.