摘要
介绍了电化学阻抗谱(EIS)技术分析涂层的测试原理、试验方法、试验装置,结合实际涂层体系建立金属/涂层/溶液体系的等效电路模型。利用电化学阻抗谱技术分析实际涂层,采用非线性最小二乘法优化电化学阻抗谱数据,采用VC编程实现这一算法,并采用ORIGIN软件拟合阻抗图谱。分析表明,2号涂层的耐盐水渗透性较差,3号涂层的防腐蚀性能较好。
This paper introduces the test theory, experiment method and test equipment of Electrochemistry Impedance Spectrum (EIS) technique in the evaluation of pipeline coating. The equivalent circuit model for metal-coating-fluids system is established combined with actual coating system of pipeline. The authors use EIS to analyze the actual coating of pipeline system, adopt the nonlinear least square method to optimize EIS data,apply VC to develop the program to realize the arithmetic and draw up impedance figures by ORIGIN software. The analytical results show that among the coatings the salt water resistance osmosis of No. 2 coating system is poor and anticorrosion performance of No. 3 coating system is good.
出处
《油气储运》
CAS
北大核心
2007年第10期39-42,共4页
Oil & Gas Storage and Transportation
关键词
油气管道
涂层失效
电化学阻抗谱(EIS)
涂层
oil/ gas pipeline, coating failure ,Electrochemistry Impedance Spectrum (EIS), coating
