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利用动电位极化曲线和电化学阻抗谱方法研究了放电等离子烧结技术(SPS)制备的生物医用Ti-24Nb-4Zr-8Sn(Ti2448)合金在Hank’s模拟人体体液中的电化学腐蚀行为及腐蚀机理,并与工业纯钛(TA1)和Ti-6Al-4V(TC4)合金进行了比较。结果表明:与TA1和TC4合金相比,在37℃的Hank’s溶液中SPS烧结Ti2448合金具有最小的腐蚀电位与致钝电流密度、接近的腐蚀电流密度以及最大的极化电阻,3种材料耐腐蚀性能好坏依次为Ti2448>TC4>TA1。
The electrochemical corrosion behavior and corrosion mechanism of biomedical Ti-24Nb-4Zr-8Sn (Ti2448) alloy prepared by spark plasma sintering technique in Hank’s simulated human body fluid were studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy , And compared with industrial pure titanium (TA1) and Ti-6Al-4V (TC4) alloys. The results show that compared with TA1 and TC4 alloys, SPS sintered Ti2448 alloy has the lowest corrosion potential and blunt current density, the close corrosion current density and the largest polarization resistance in Hank’s solution at 37 ℃. The corrosion resistance of the three materials Performance is followed by Ti2448> TC4> TA1.