EIS法测量管道外防腐层的失效  

DETECTING METHOD FOR INVALIDATION OF EXTRAL COATINGS BY EIS

作　　者：叶春艳[1] 何岚[2] 李建忠[1] 韩钟琴[1] 王占榜[1] 

机构地区：[1]中国石油天然气管道科学研究院,廊坊065000 [2]中国石油天然气管道局第四工程公司,廊坊065000

出　　处：《腐蚀科学与防护技术》2008年第4期307-309,共3页Corrosion Science and Protection Technology

基　　金：中国石油天然气集团公司埋地管道外防腐层失效及评价技术研究项目资助(2004)

摘　　要：采用电化学交流阻抗(EIS)技术测量输油气管道常用外防腐层失效性的方法测量各类涂层在3%NaC l水溶液中不同时间段的阻抗图谱,分析对比相同条件其电化学参数及涂层吸水率的变化,最终对涂层在3%NaC l水溶液中失效可能性排序为:PP/PE胶带>单/双层FBE>无溶剂环氧>煤焦油瓷漆>环氧煤沥青>3PE.A detecting method of external coatings for pipeline by EIS was introduced for oil and gas fields. The EIS change of different coatings was measured in 3% NaCl solution with time,electrochemical impedance spectra and the relevant parameters including the water absorbility of the coatings were analyzed and contrasted, accordingly the validity of the coatings will be accessed.

关 键 词：管道 涂层 EIS 失效 

分 类 号：TG174.37[金属学及工艺—金属表面处理]