Abstract In this study iron oxide (Fe3O4) incorporated hydroxyapatite (HA) and chitosan (CS) composite coatings were developed to enhance the corrosion resistance and surface properties of Ti–13Nb–13Zr alloy. Pure HA and composites with different percentage (1, 3 and 5%, wt%) of Fe3O4 have been fabricated by using the electrophoretic deposition method (EPD). The morphology of the composite coating indicated porous nature with average 10 ± 0.2 µm coating thickness, were examined by scanning electron microscopy (SEM). The wettability behavior and surface roughness values of the composite coatings were measured and discussed. The Electrochemical test was performed to evaluate the corrosion behavior in Ringer's solution. The HA-1wt% Fe3O4 composite coating exhibited the preeminent corrosion resistance with lowest Icorr and the highest Ecorr value as a contrast to HA-3wt% Fe3O4 and HA-5wt% Fe3O4 coatings. Additionally, in vitro bioactivity test were conducted in Ringer's solution for 7 days. It was found that the composite coating enhanced the apatite formation ability, which was further endorsed by SEM-EDX analysis. In conclusion, the composite HA-CS bioactive coating incorporated with Fe3O4 is proposed as a promising candidate for biomedical applications.

中文翻译：

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用于生物医学应用的 Ti-13Nb-13Zr 合金上羟基磷灰石-氧化铁-壳聚糖复合涂层的电泳沉积

摘要 本研究开发了氧化铁 (Fe3O4) 结合羟基磷灰石 (HA) 和壳聚糖 (CS) 复合涂层，以提高 Ti-13Nb-13Zr 合金的耐腐蚀性和表面性能。使用电泳沉积法 (EPD) 制备了纯 HA 和具有不同百分比 (1、3 和 5%, wt%) Fe3O4 的复合材料。通过扫描电子显微镜 (SEM) 检查复合涂层的形态表明具有平均 10 ± 0.2 µm 涂层厚度的多孔性质。测量并讨论了复合涂层的润湿性和表面粗糙度值。进行电化学测试以评估林格溶液中的腐蚀行为。与 HA-3wt% Fe3O4 和 HA-5wt% Fe3O4 涂层相比，HA-1wt% Fe3O4 复合涂层表现出卓越的耐腐蚀性，具有最低的 Icorr 和最高的 Ecorr 值。此外，在林格氏溶液中进行了 7 天的体外生物活性测试。发现复合涂层增强了磷灰石的形成能力，SEM-EDX分析进一步证实了这一点。总之，与 Fe3O4 结合的复合 HA-CS 生物活性涂层被认为是生物医学应用的有希望的候选者。