Abstract Recently, magnesium and its alloys have been investigated as potential candidates for orthopedic implants, due to their numerous beneficial mechanical properties. Nevertheless, magnesium is characterized by its poor corrosion resistance in chloride-rich environment, present in the human body. Unfortunately, this major disadvantage limits the biomedical applications of magnesium alloys. The corrosion rate of these materials can be decreased with the use of oxide films (e.g. ZnO, TiO2, MgO). In the article, a comparison was conducted, with regard to the structure and corrosion behavior of TiO2 films, with the thickness of about 300 nm, deposited onto MgCa4Zn1Gd1 alloy by magnetron sputtering and spin coating methods. The structure observations of the oxide films in scanning electron microscopy are also presented. The phase analysis using X-ray diffractometer and structure identification using the Raman spectrometer are also shown. Moreover, the paper also includes a discussion on the topography observations and roughness measurements in atomic force microscopy. The results of the potentiodynamic and immersion tests of corrosion resistance of TiO2 films in Ringer's solution at 310.15 K are also presented. The analysis of investigation results shows that both of the studied films have an anatase structure. The surface of TiO2 applied using the magnetron sputtering method is characterized by smaller and more uniform grains, compared to the film applied via spin coating. TiO2 applied using the physical vapor deposition method has a slightly higher electrochemical corrosion resistance. The results of immersion tests have shown, that the alloy with TiO2 film deposited by sol-gel is more resistant to corrosion.

中文翻译：

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使用磁控溅射和溶胶-凝胶沉积在镁基合金上的 TiO2 薄膜的结构和腐蚀行为

摘要 最近，镁及其合金因其众多有益的机械性能而被研究作为骨科植入物的潜在候选物。然而，镁的特点是在人体中存在的富含氯化物的环境中耐腐蚀性较差。不幸的是，这一主要缺点限制了镁合金的生物医学应用。使用氧化膜（例如 ZnO、TiO2、MgO）可以降低这些材料的腐蚀速率。在文章中，通过磁控溅射和旋涂方法在MgCa4Zn1Gd1合金上沉积约300 nm厚的TiO2薄膜的结构和腐蚀行为进行了比较。还介绍了扫描电子显微镜中氧化膜的结构观察。还显示了使用 X 射线衍射仪的相位分析和使用拉曼光谱仪的结构识别。此外，本文还讨论了原子力显微镜中的形貌观察和粗糙度测量。还介绍了 TiO2 薄膜在 310.15 K 的林格溶液中的耐腐蚀性的动电位和浸泡试验结果。调查结果分析表明，所研究的两种薄膜均具有锐钛矿结构。与通过旋涂施加的薄膜相比，使用磁控溅射法施加的 TiO2 表面的特点是颗粒更小、更均匀。使用物理气相沉积方法施加的 TiO2 具有稍高的电化学耐腐蚀性。浸泡试验的结果表明，