【作者】 刘欣杰； 韩会民； 卢守栋； 杨大智；

【Author】 LIU Xin-jie~1 HAN Hui-min~1 LU Shou-dong~1 YANG Da-zhi~(1,2) (1.State Key Laboratory for Material Modification by Laser,Ion and Electron Beams;Dalian University of Technology,Dalian 116024,China; 2.School of Materials Science and Engineering,Dalian University of Technology,Dalian 116085,China)

【机构】 大连理工大学三束材料改性国家重点实验室；

【摘要】 提出了一种改进的电化学抛光液(冰醋酸- 高氯酸-A-B),并采用此抛光工艺对 NiTi 合金(Ti-50．8％ (原子分数)Ni)进行电化学抛光．与机械抛光作对比, 研究了两种抛光技术对合金表面光洁度的影响,并利用电化学方法研究了抛光技术对合金在 Hanks’溶液中腐蚀性能的影响．研究结果表明,此工艺下的电化学抛光有效降低了 NiTi 合金的表面粗糙度,光亮度近似镜面状态．与机械抛光相比,电化学抛光更好地提高了 NiTi 合金在 Hanks’溶液中的耐腐蚀性能．更多还原

【Abstract】 A modified electrolyte （HClO₄-CH₃COOH-A-B） for NiTi alloys was presented,and a Ti-50.8at.%Ni alloy was electrochemical polished using this electrolyte,while the mechanical polishing method was also used as a reference.The smoothness of the alloy for electrochemical and mechanical polishing was assessed;and the potentiodynamic polarization technique was carried out in Hanks’ solution to verify the corrosion resistance.The results revealed that electrochemical polishing using this electrolyte reduced surface roughness significantly and the lightness was close to mirror.Compared to mechanical polishing,electrochemical polishing improved the corrosion resistance greatly.更多还原