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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Behaviour of Ti-20Nb-10Zr-5Ta Alloy in Simulated Physiological Fluids after Anodic Electrolytic Oxidation
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Electrochemical Behaviour of Ti-20Nb-10Zr-5Ta Alloy in Simulated Physiological Fluids after Anodic Electrolytic Oxidation

机译：阳极电解氧化后Ti-20Nb-10Zr-5Ta合金在模拟生理液中的电化学行为

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In this paper, the anodic galvanostatic electrolytic method was applied on the new Ti-20Nb-10Zr-5Taalloy (containing only non-toxic and non-allergic elements) surface; microstructure (by XRD) andmorphology (by SEM) of the obtained layer was analysed. Also, the electrochemical behaviour (bypotentiodynamic and linear polarisation and electrochemical impedance spectroscopy) of thegalvanostatic oxidation Ti-20Nb-10Zr-5Ta alloy and the characterisation of the coating that grew onthe alloy surface after 300 immersion hours in simulated physiological fluids are presented. All mainelectrochemical parameters became more favourable with the prolonged soaking time, due to theincrease of the protective nature of the oxidation layer as result of the new depositions from thebiofluids (by SEM). An electric equivalent circuit with two time constants was modelled: the firstconstant is for the electrodeposited barrier layer and the second constant characterises the porous layerdeposited from solution. SEM micrographs and EDS elemental analysis showed that the coatingformed after 300 immersion hours in Ringer and Ringer-Brown solutions contained calciumphosphates, precursors of the hydroxyapatite, the main inorganic component of the human bone,namely, the alloy surface became bioactive.
机译：本文在新的Ti-20Nb-10Zr-5Taalloy（仅包含无毒和无过敏元素）表面上采用了阳极恒电流电解法;分析了所得层的显微组织（通过XRD）和形态（通过SEM）。此外，还介绍了恒电流氧化Ti-20Nb-10Zr-5Ta合金的电化学行为（势能和线性极化以及电化学阻抗谱），以及在模拟生理流体中浸泡300小时后在合金表面生长的涂层的特性。所有主要的电化学参数随着浸泡时间的延长而变得更加有利，这是由于生物流体的新沉积（通过SEM）增加了氧化层的保护性。对具有两个时间常数的等效电路进行了建模：第一个常数用于电沉积的势垒层，第二个常数表征从溶液沉积的多孔层。 SEM照片和EDS元素分析表明，在林格和林格布朗溶液中浸泡300小时后形成的涂层含有磷酸钙，羟基磷灰石的前体，人骨的主要无机成分，即合金表面具有生物活性。

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