Abstract: Electrochemical impedance spectroscopy（EIS）occupies an important positionin the evaluation of protective performance of organic coating. After nearly half a century ofresearch and application，many experimental，data processing and evaluation methods for EIS have been derived. In this paper，some major research and application works on EIS for the evaluation of protective performance of organic coating had been reviewed，and some shortcomings of EIS in practical applications had also been elaborated. Especially，EIS could not be used for evaluating the cathodic protection or activity inhibition coating alone，and earlystage tests by other methods should be conducted to support the EIS interpretation. Finally，it was proposed that the judgment basis of EIS for coating aging and protection evaluation remained in the empirical stage. In order to improve the universality of EIS，it was urgently needed to establish the relevant databases，which could be used for data management and sharing，supporting the rapid coating evaluation，and helping the long-term protection of steel structures. 

Key words: electrochemical impedance spectroscopy, organic coating, protective performance, performance evaluation

摘要： 电化学阻抗谱（EIS）技术在有机涂层防护性能评价中占有重要地位。经过将近半个世纪的科研和应用，EIS技术衍生出很多试验、数据处理和评估方法。文章对 EIS用于有机涂层防护性能评价的一些主要研究和应用工作进行了总结，并阐述了一些 EIS技术在实际应用中的短板，特别是对于阴极保护型或活性抑制型涂层，不能作为单一腐蚀测试方法来使用，需要在前期补充其他试验，用于支撑阻抗数据解读。最后提出 EIS用于涂层老化和防护评价判断依据尚处于经验性数据阶段，为提升普适性，亟需建立相关数据库，用于数据管理和共享，支撑涂层快速评价，助力钢结构长效防护。

关键词: 电化学阻抗谱, 有机涂层, 防护性能, 性能评价

CLC Number: 

• TQ630. 7 +2