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

• Published in: Transactions of Tianjin University Vol. 18; no. 1; pp. 15 - 20
• Main Author: 夏大海 宋诗哲 王吉会 毕慧超 韩哲文
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University 01-02-2012; School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
• Subjects: Engineering; Humanities and Social Sciences; Mechanical Engineering; multidisciplinary; Science; 快速评估; 扫描探针显微镜; 扫描电子显微镜; 数据分析; 有机涂层; 电化学阻抗谱; 退化程度; 降解系数; organic coating; fast evaluation; electrochemical impedance spectroscopy; degradation process
• ISSN: 1006-4982; 1995-8196
• DOI: 10.1007/s12209-012-1752-3

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.