Sukuroglu Ebru Emine, Sukuroglu Suleyman, Akar Kubra, Totik Yasar, Efeoglu Ihsan, Arslan Ersin
1 Department of Mechanical Engineering, Faculty of Engineering, Gümüşhane University, Gümüşhane, Turkey.
2 Vocational College of Gümüşhane, Gümüşhane University, Gümüşhane, Turkey.
Proc Inst Mech Eng H. 2017 Aug;231(8):699-704. doi: 10.1177/0954411917705909. Epub 2017 Apr 28.
NiTi alloys exhibit good properties, such as shape memory behavior, high corrosion resistant, having the closest elasticity modulus of a human bone and superior biocompatibility properties. However, the surface problems that arise during the use of this alloy limit the usage in the industry and health sector. In recent years, micro-arc oxidation method is used to improve the surface properties and increase the usage of these alloys. In this study, the TiO coatings were deposited on the NiTi substrates. The surface topography, morphology, crystallographic structure, and thickness of the coatings were determined using scanning electron microscopy and X-ray diffraction. The corrosion properties were investigated using potentiostat test unit in two different media such as NaCl solution and simulated body fluid. The results show that the coated samples have higher corrosion resistance than uncoated samples in the two different media.
镍钛合金具有良好的性能，如形状记忆行为、高耐腐蚀性、与人骨最接近的弹性模量以及优异的生物相容性。然而，这种合金在使用过程中出现的表面问题限制了其在工业和医疗领域的应用。近年来，微弧氧化方法被用于改善这些合金的表面性能并增加其应用。在本研究中，在镍钛基体上沉积了TiO涂层。使用扫描电子显微镜和X射线衍射确定了涂层的表面形貌、形态、晶体结构和厚度。使用恒电位仪测试装置在两种不同介质（如NaCl溶液和模拟体液）中研究了腐蚀性能。结果表明，在两种不同介质中，涂层样品比未涂层样品具有更高的耐腐蚀性。
