论文部分内容阅读
钛及其合金具有良好的力学性能和生物相容性,被广泛地用作医用人工植入体.然而,钛植入体在人体内的生理环境中必然发生腐蚀,金属离子的溶出和积累可产生毒副作用.本文应用电化学方法对医用钛金属作表面改性,提高其生物活性,应用Tafel极化曲线和电化学阻抗(EIS)研究其耐蚀性能及腐蚀电化学行为.结果表明,在钛基TiO2纳米管阵列膜层上沉积构筑HA涂层之后,由于表面阻挡层的强化,TiO2涂层在Tyrode’s生理溶液中的耐蚀性有所提高.
Titanium and its alloys have good mechanical properties and biocompatibility and are widely used as medical artificial implants.However, titanium implants inevitably corrode in the physiological environment of the human body, and the dissolution and accumulation of metal ions may be Toxic and side effects.In this paper, electrochemical methods for the surface modification of titanium metal to improve its biological activity, the application of Tafel polarization curve and electrochemical impedance (EIS) corrosion resistance and electrochemical corrosion behavior.The results show that in the After the deposition of the HA coating on the Ti-based TiO2 nanotube array film, the corrosion resistance of the TiO2 coating in Tyrode’s physiological solution is enhanced due to the strengthening of the surface barrier.