Fast Evaluation of Degradation Degree of Organic Coatings by Analyzing Electrochemical Impedance Spectroscopy Data  

作　　者：XIA Dahai SONG Shizhe WANG Jihui BI Huichao HAN Zhewen 夏大海;宋诗哲;王吉会;毕慧超;韩哲文(School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China

出　　处：《Transactions of Tianjin University》2012年第1期15-20,共6页天津大学学报（英文版）

基　　金：Supported by Major State Basic Research Program of China ("973"Program,No. 2011CB610500)

摘　　要：The degradation coefficient is proposed to evaluate the degradation degree of organic coatings by directly anaIyzing the Bode plots of the electrochemical impedance spectroscopy （EIS） data. This paper investigated the degradation of phenolic epoxy coating/tinplate system by EIS and the degradation coefficient value, which correlates well with the results of breakpoint frequency and variation of phase angle at 10 Hz. Furthermore, the degradation process was confirmed by scanning electron microscope （SEM） and scanning probe microscopy （SPM）. It is concluded that degradation coefficient can be used for the fast evaluation of degradation degree of organic coatings in practical appli- cations.The degradation coefficient is proposed to evaluate the degradation degree of organic coatings by directly analyzing the Bode plots of the electrochemical impedance spectroscopy (EIS) data.This paper investigated the degradation of phenolic epoxy coating/tinplate system by EIS and the degradation coefficient value,which correlates well with the results of breakpoint frequency and variation of phase angle at 10 Hz.Furthermore,the degradation process was confirmed by scanning electron microscope (SEM) and scanning probe microscopy (SPM).It is concluded that degradation coefficient can be used for the fast evaluation of degradation degree of organic coatings in practical applications.

关 键 词：degradation process electrochemical impedance spectroscopy fast evaluation organic coating 

分 类 号：TB30[一般工业技术—材料科学与工程]