镁合金在模拟人体体液中降解及摩擦磨损机理  

Degradation and Friction Mechanism of Magnesium Alloy in Simulated Human Body Fluid

作　　者：朱宁[1] 倪明[1,2] 诸婧怡[3] 孙笑晗 王东胜 常雪婷 孙万驹 ZHU Ning;NI Ming;ZHU Jingyi;SUN Xiaohan;WANG Dongsheng;CHANG Xueting;SUN Wanju(School of Health Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Orthopedics,Shanghai Pudong New Area People's Hospital,Shanghai 201200,China;School of Marine Science and Engineering,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海理工大学健康科学与工程学院,上海200093 [2]上海市浦东新区人民医院骨科,上海201200 [3]上海海事大学海洋科学与工程学院,上海201306

出　　处：《腐蚀与防护》2025年第4期29-34,44,共7页Corrosion & Protection

基　　金：上海市“科技创新行动计划”生物医药科技支撑专项(22S31900700)。

摘　　要：镁金属具有良好的生物学特性,且植入人体内后能够迅速降解直至完全消失,但由于镁的化学性质较活泼,容易与人体体液发生氧化反应,从而被迅速腐蚀,无法满足髓内钉需要一定降解周期的使用要求,尤其是承载后,摩擦-腐蚀耦合作用可能进一步加剧其降解。通过腐蚀形貌观察、腐蚀速率测试、电化学极化曲线以及摩擦磨损试验等,综合分析了纯镁和镁合金在模拟人体体液(SBF)中的腐蚀速率及摩擦磨损性能。结果表明:镁合金在模拟人体体液中的腐蚀速率较纯镁降低了50%,约为3.98 mm/a;在干摩擦条件下,镁合金的摩擦因数较纯镁的略有下降,磨损量也明显降低;在SBF介质环境中,两种材料的腐蚀都以吸氧腐蚀为主,决定腐蚀速率的主要因素是阳极的极化过程。Magnesium metal has good biological properties and can rapidly degrade until it completely disappears after being implanted into the human body.However,due to its active chemical properties,magnesium is prone to oxidation reactions with human body fluids,leading to rapid corrosion and unable to meet the requirements of a certain degradation cycle for intramedullary nails.Especially after bearing,the friction corrosion coupling effect may further accelerate its degradation rate.Through observation of corrosion morphology,corrosion rate testing,electrochemical polarization curves,and friction and wear tests,a comprehensive analysis was conducted on the biological rate and friction and wear properties of pure magnesium and magnesium alloys in simulated human body fluid(SBF).The results show that the corrosion rate of magnesium alloy in simulating human body fluids was reduced by 50%compared to pure magnesium,about 3.98 mm/a.Under dry friction conditions,the friction coefficient of magnesium alloy slightly decreased compared to pure magnesium,and the wear amount was also significantly reduced.In the SBF medium environment,the corrosion of both materials was mainly oxygen corrosion,and the main factor determining the corrosion rate was the anodic polarization process.

关 键 词：医用材料 镁合金 模拟人体环境 腐蚀 摩擦磨损 

分 类 号：TG178[金属学及工艺—金属表面处理]