An improvement to the data processing course of electrochemical impedance technique

作     者：Yinglv Jiang, Yinshun Wu, and Hong ChuCorrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China 

作者机构：Corrosion and Protection Ctr. Univ. of Sci. and Technol. Beijing Beijing 100083 China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2003年第10卷第6期

页      面：57-60页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：titanium alloy electrochemical impedance corrosion 

摘      要：For some electrochemical systems the traditional data processing methods cannot be met, so it is necessary to develop a new method to deal with these problems. When processingthe electrochemical AC impedance data of titanium alloy TA12 in 3 percent NaCl solution (at freecorrosion potential, room temperature) a new method is developed which can detach the information ofthe interface resistance demonstrably from the interface capacitance. The results show that theinterface resistance and capacitance are all functions of frequency. And the AC impedance of theresistance and capacitance obey the following relations: C(f) = 10^(4.01982) f^(-0.9292), R(f)=10^(4.80011) (f+0.008)^(-0.90897), which is completely different from the traditional conceptionthat the interface resistance and capacitance are constants. And this phenomenon is ubiquitous intitanium alloys according to the study. So perhaps it is an innate characteristic of interface.