Electropolishing of titanium alloy under hydrodynamic mode

作     者：Pei Huang Junhui Lai Lianhuan Han Fang-Zu Yang Li-Min Jiang Jian-Jia Su Zhao-Wu Tian Zhong-Qun Tian Dongping Zhan 

作者机构：State Key Laboratory of Physical Chemistry of Solid SurfacesDepartment of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China School of Material Science and EngineeringNanchang Hangkong UniversityNanchang 330034China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2016年第59卷第11期

页      面：1525-1528页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (91323303  21327002  21573054  21321062) 

主　　题：electrochemical machining electropolishing titanium alloy hydrodynamic viscous layer 

摘      要：Titanium(Ti) alloys are widely used in aerospace industry due to the low density and high corrosion resistance. However, machining and polishing remain great challenges because of the hardness and chemical stability. With a home-made electrochemical machining workstation, cyclic voltammetry is performed at a wide potential range of [0 V, 20 V] to record the details of passivation and depassivation processes under a hydrodynamic mode. The results show that the thickness of viscous layer formed on the alloy surface plays a crucial effect on the electropolishing quality. The technical parameters, including the mechanical motion rate, polishing time and electrode gap, are optimized to achieve a surface roughness less than 1.9 nm, which shows a prospective application in the electrochemical machining of Ti and it alloys.