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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其寿命期间经历显着疲劳的装置和由金属合金制成的装置。食品和药物管理局在一些情况下推荐用于对后疲劳装置进行腐蚀测试[非临床试验和血管内支架的推荐标记：工业和FDA工作人员的指导。 2005年：食品和药物管理局，设备和放射健康中心]虽然需要这一点[Nagaraja S等人，J生物密制res，2016年，8.]本研究旨在评估疲劳对医疗装置常用5种不同材料的耐腐蚀性的影响：316 LVM不锈钢，MP35N钴铬，电抛光镍钛醇，机械抛光镍钛合金和黑色氧化物镍钛醇。在每次ASTM F2129的腐蚀测试之前，将每种合金的电线分成亚组，并且没有（即，接收）;高应变疲劳少于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PBS浸泡8天。腐蚀测试的结果表明，剩余的潜力随着PBS中越来越多的时间而趋于平衡势，并且没有统计（p？＆Δ05）疲劳和匹配PBS浸泡组的崩溃潜力差异为10分中的9个测试条件。我们的研究结果表明，在这些非犯规条件下，通过每ASTM F2129的故障电位测量的腐蚀敏感性不受疲劳条件的影响。 2016 Wiley期刊，Inc。J生物保证师B：Appl Biomater，105B：2019-2026,2017。

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