Titanium and titanium alloys are extensively used in biomedical, cardiac and cardiovascular applications for their superb properties, such as good fatigue strength, low modulus, machinability, formability, corrosion resistance and biocompatibility. However, titanium and its alloys do not meet the majority of all clinical necessities. Due to these reasons, surface modification is frequently performed to enhance the mechanical, biological and chemical properties of titanium and alloys. In this work, nanocomposites coating of poly(ɛ-caprolactone)/hydroxyapatite/forsterite (PCL/HA/F) have been successfully deposited on the Ti6Al4V substratesby dip coating at room temperature. The coatings are prepared with various concentrations of forsterite/hydroxyapatite nanopowder (2, 4, 6 and 8 wt.%) with a fixed concentration of PCL (4 wt.%) and thus coated Ti6Al4V substrates are examined for corrosion resistance. PCL/Hydroxyapatite/Forsterite coatings are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), which clearly showed the formation of nanocomposites. Potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) are used to investigate corrosion behavior of the coated substrates, which portrayed that the composite coating of PCL/HA/F substantially enhanced the corrosion resistance of Ti6Al4V alloy.

中文翻译：

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在Ti6Al4V基底上浸渍镁橄榄石-羟基亲和性聚（ε-己内酯）纳米复合材料的涂层以防止腐蚀

钛和钛合金以其出色的性能（例如，良好的疲劳强度，低模量，可加工性，可成形性，耐腐蚀性和生物相容性）而广泛用于生物医学，心脏和心血管应用。但是，钛及其合金不能满足所有临床必需品的大多数。由于这些原因，经常进行表面改性以增强钛和合金的机械，生物学和化学性质。在这项工作中，在室温下通过浸涂将聚（ε-己内酯）/羟基磷灰石/镁橄榄石（PCL / HA / F）的纳米复合涂层成功地沉积在了Ti6Al4V基板上。用各种浓度的镁橄榄石/羟基磷灰石纳米粉（2、4、6和8 wt。％）和固定浓度的PCL（4 wt。％）制备涂层。然后检查涂覆的Ti6Al4V衬底的耐腐蚀性。PCL /羟基磷灰石/镁橄榄石涂层的特征在于X射线衍射（XRD）和扫描电子显微镜（SEM），清楚地表明了纳米复合材料的形成。用电位动力学极化曲线和电化学阻抗谱（EIS）研究涂层基底的腐蚀行为，这表明PCL / HA / F的复合涂层显着提高了Ti6Al4V合金的耐腐蚀性。