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Abstract：
Thin films of transition metal oxides and oxynitrides have proven highly effective in protecting stainless steels against corrosion in both chemically aggressive environments and biological fluids. In the present work, cerium zirconium oxynitride thin films were deposited to enhance the corrosion resistance of surgical-grade stainless steel to be used in osteosynthesis processes. Two techniques were employed: co-sputtering and radiofrequency (RF) sputtering, and the morphology and corrosion efficiency of the coatings deposited by each technique were evaluated. X-ray diffraction, X-ray photoelectron spectroscopy and field emission transmission electron microscopy were used to characterize the morphological and chemical structure, respectively. Additionally, the corrosion resistance of the oxynitride-coated surgical grade stainless steel system (ZrCeOxNy-AISI 316L) was assessed using Hank\'s solution as the corrosive electrolyte, to determine its resistance to corrosion in biological media. The results show that ZrCeOxNy coatings increase the corrosion resistance of surgical grade stainless steel by two orders of magnitude and that the Ce(III)/Ce(IV) equilibrium decreases the corrosion rate, thereby increasing the durability of the steel in a biological environment. The results show that Ce coatings increase the corrosion resistance of surgical grade stainless steel by two orders of magnitude and that the Ce(III)/Ce(IV) equilibrium decreases the corrosion rate, thereby increasing the durability of the steel in a biological environment.
摘要：
过渡金属氧化物和氮氧化物的薄膜已被证明在保护不锈钢免受化学侵蚀性环境和生物流体中的腐蚀方面非常有效。在目前的工作中,沉积铈锆氮氧化物薄膜以增强用于骨接合工艺的外科级不锈钢的耐腐蚀性。采用了两种技术：共溅射和射频（RF）溅射，并评估了每种技术沉积的涂层的形貌和腐蚀效率。X射线衍射,采用X射线光电子能谱和场发射透射电子显微镜对其形貌和化学结构进行表征,分别。此外,氧氮化物涂层外科级不锈钢系统(ZrCeOxNy-AISI316L)的耐腐蚀性使用Hank's溶液作为腐蚀性电解质进行评估,以确定其在生物介质中的耐腐蚀性。结果表明，ZrCeOxNy涂层使外科级不锈钢的耐腐蚀性能提高两个数量级，Ce（III）/Ce（IV）平衡降低了腐蚀速率，从而提高钢在生物环境中的耐久性。结果表明，Ce涂层使外科级不锈钢的耐腐蚀性能提高两个数量级，Ce（III）/Ce（IV）平衡降低了腐蚀速率，从而提高钢在生物环境中的耐久性。
