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Evaluation of anti-corrosion properties of DLC coatings for medical devices

机译：医疗器械DLC涂层抗腐蚀性能评价

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Biomaterials are now widely being used as coatings over different medical implants and devices to prevent the implants and medical devices from the environment they interact with; to be precise the coatings prohibit any unwanted biocompatibility issue. A research was carried out on stainless steel disks that commonly become the very foundation of the medical implants such as artificial hip bones or other plates that are used invasively for fixation of fracture. For the purpose of coating Diamond-Like Carbon (DLC) coating was used because they can be coated on wide range of materials that include: metals, ceramics, glasses and plastics. The DLC coatings exhibit low friction, wear resistance, corrosion resistance and biocompatible properties. The DLC coatings when combined with different elements can be tempered as per required. Diamond-Like Carbon (DLC) coatings with various Silicon and Fluorine content were deposited on 10mm 316L Stainless Steel disks. The samples were investigated for their surface energies and their corrosion resistance. The corrosion resistance behavior was tested in 4 different testing solutions, which were the Phosphate Buffer Saline, 3.5% NaCl and two different concentrations of HCl. To test the surface energies, contact angle measurement was adopted and the result showed significant decrease in the total surface energy for the Fluorinated coatings. While potentio-dynamic polarization test method were performed for testing the corrosion resistance properties of the samples. The corrosion rates revealed that 20.7% F-DLC coating had promising results which was showing the best corrosion resistance; also the 19.7% Si-doped DLC had the best corrosion resistance in its class.
机译：生物材料现在广泛用作不同的医疗植入物和装置上的涂料，以防止植入物和医疗器械与他们的互动的环境;精确涂料禁止任何不需要的生物相容性问题。在不锈钢盘上进行了一种研究，通常成为医疗植入物的基础，例如人造髋骨或其他板，用于固定裂缝的固定。为了涂覆金刚石状碳（DLC）涂层，因为它们可以涂覆在宽范围内的材料上，包括：金属，陶瓷，玻璃和塑料。 DLC涂层表现出低摩擦，耐磨性，耐腐蚀性和生物相容性。当与不同元素组合时，DLC涂层可以根据所需回火。用各种硅和氟含量的金刚石碳（DLC）涂层沉积在10mm 316L不锈钢盘上。研究了样品以进行表面能及其耐腐蚀性。在4种不同的测试溶液中测试耐腐蚀性行为，其是磷酸盐缓冲盐，3.5％NaCl和两种不同浓度的HCl。为了测试表面能，采用接触角测量，结果显示出氟化涂层的总表面能显着降低。虽然进行了对测试样品的耐腐蚀性特性进行了电极 - 动态偏振测试方法。腐蚀速率显示，20.7％的F-DLC涂层具有有前途的耐腐蚀性;此外，19.7％的SI-DOPED DLC在课堂上具有最佳耐腐蚀性。

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