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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >The effect of fatigue on the corrosion resistance of common medical alloys
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The effect of fatigue on the corrosion resistance of common medical alloys

机译：疲劳对常见医用合金耐腐蚀性的影响

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Abstract The effect of mechanical fatigue on the corrosion resistance of medical devices has been a concern for devices that experience significant fatigue during their lifespan and devices made from metallic alloys. The Food and Drug Administration had recommended in some instances for corrosion testing to be performed on post‐fatigued devices [Non‐clinical tests and recommended labeling for intravascular stents and associated delivery systems: guidance for industry and FDA staff. 2005: Food and Drug Administration, Center for Devices and Radiological Health], although the need for this has been debated [Nagaraja S, et al., J Biomed Mater Res Part B: Appl Biomater 2016, 8.] This study seeks to evaluate the effect of fatigue on the corrosion resistance of 5 different materials commonly used in medical devices: 316 LVM stainless steel, MP35N cobalt chromium, electropolished nitinol, mechanically polished nitinol, and black oxide nitinol. Prior to corrosion testing per ASTM F2129, wires of each alloy were split into subgroups and subjected to either nothing (that is, as received); high strain fatigue for less than 8 min; short‐term phosphate buffered saline (PBS) soak for less than 8 min; low strain fatigue for 8 days; or long‐term PBS soak for 8 days. Results from corrosion testing showed that the rest potential trended to an equilibrium potential with increasing time in PBS and that there was no statistical ( p ??0.05) difference in breakdown potential between the fatigued and matching PBS soak groups for 9 out of 10 test conditions. Our results suggest that under these nonfretting conditions, corrosion susceptibility as measured by breakdown potential per ASTM F2129 was unaffected by the fatigue condition. 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2019–2026, 2017.
机译：摘要机械疲劳对医疗器械耐腐蚀性的影响一直是在使用寿命期间经历严重疲劳的器械和由金属合金制成的器械关注的问题。美国食品和药物管理局曾在某些情况下建议对疲劳后设备进行腐蚀测试[血管内支架和相关输送系统的非临床测试和推荐标签：行业和FDA工作人员指南。2005年：美国食品和药物管理局，设备和放射健康中心]，尽管对这一点的必要性进行了辩论[Nagaraja S，et al.，J Biomed Mater Res B部分：Appl Biometer 2016，8]本研究旨在评估疲劳对医疗器械中常用的5种不同材料耐腐蚀性的影响：316 LVM不锈钢、MP35N钴铬、电抛光镍钛合金、机械抛光镍钛合金和黑色氧化物镍钛合金。在按照ASTM F2129进行腐蚀试验之前，将每种合金的导线分成若干子组，并且不进行任何试验（即接收时）；高应变疲劳时间小于8分钟；短期磷酸盐缓冲盐水（PBS）浸泡少于8分钟；低应变疲劳8天；或长期浸泡PBS 8天。腐蚀试验的结果表明，在PBS中，随着时间的增加，静止电位趋向于平衡电位，在10个试验条件中的9个试验条件下，疲劳和匹配的PBS浸泡组之间的击穿电位没有统计学差异（p？；0.05）。我们的结果表明，在这些非纤维条件下，根据ASTM F2129通过击穿电位测量的腐蚀敏感性不受疲劳条件的影响。2016威利期刊有限公司，《生物医学材料研究》B部分：Appl Biomater，105B:2019-2026，2017年。

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