封闭处理对316L不锈钢超声场下磷化膜性能的影响

发布时间：2018-05-20 08:33

本文选题：L不锈钢 + 超声磷化　；参考：《中国表面工程》2017年01期

【摘要】：316L不锈钢因其优良的力学性能、耐蚀性以及相对较低的价格成为人工关节、固定支架、齿科、心脏外科等植入材料之一。但316L不锈钢在临床应用中仍然存在着耐磨性差以及对人体有害元素镍离子的溢出等问题,为了改善316L不锈钢的生物医用性能,在316L不锈钢磷化处理中引入超声场,并采用封闭处理提高磷化膜的致密性,通过单因素试验法优化封闭处理工艺参数。借助扫描电子显微镜、X射线衍射仪、电化学工作站等仪器对磷化膜的表面形貌、结构、耐蚀性、抗凝血性能和镍离子溢出等性能进行研究。结果显表明:经过封闭处理后,磷化膜的孔隙率由原先的9.8%下降到2.9%;磷化处理后的试样均能诱导类骨磷灰石形成,抗凝血时间从基材的25 min增加到60 min以上;镍离子的溢出量从基材的1.827μg/m L降低到0.134μg/m L,有效阻隔了镍离子的溢出。
[Abstract]:Due to its excellent mechanical properties, corrosion resistance and relatively low price, 316L stainless steel has become one of the implant materials such as artificial joint, fixed bracket, dental department, cardiac surgery and so on. However, there are still some problems in the clinical application of 316L stainless steel, such as poor wear resistance and overflow of harmful element nickel ion. In order to improve the biomedical properties of 316L stainless steel, ultrasonic field is introduced into the phosphating treatment of 316L stainless steel. The densification of phosphating film was improved by sealing treatment, and the process parameters were optimized by single factor test. The surface morphology, structure, corrosion resistance, anticoagulant performance and nickel ion overflow of phosphating film were studied by means of scanning electron microscope (SEM) and electrochemical workstation. The results showed that the porosity of phosphating film decreased from 9.8% to 2.9% after sealing treatment, and the formation of bone-like apatite was induced, and the anticoagulant time increased from 25 min to more than 60 min. The amount of nickel ion overflow decreased from 1.827 渭 g / mL of substrate to 0.134 渭 g / mL, which effectively blocked the overflow of nickel ion.
【作者单位】：江苏大学材料科学与工程学院;
【基金】：国家自然科学基金(50772044) 江苏省介入医疗器械研究重点实验室开放基金(JR1106)~~
【分类号】：TG174.4

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