用试片断电法测量埋地管道的断电电位和去极化过程  

Measurement of the Off Potential and Depolarization Process of Buried Pipelines with Test Block Power Interruption Method

作　　者：李自力[1] 谢跃辉[1] 郝宏娜[1] 卫续[1] 张娜[1] 禹浩 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,青岛266555 [2]中石油西气东输管道公司豫皖管理处,郑州450001

出　　处：《腐蚀与防护》2012年第3期255-257,共3页Corrosion & Protection

摘　　要：采用试片断电法测量管道的断电电位来评价埋地管道的阴极保护效果。在室内建立了一个埋地管道外加电流阴极保护系统,用试片断电法测量了管道缺陷处的断电电位和去极化过程,并对测量结果进行分析。结果表明,断电电位应在断电后50～100ms之间读取,按此测量试片去极化过程中形成的电位差值,该值与100mV的比较结果可以判断阴极保护效果。The test block power interruption method is an effective way to measure the cathodic protection potential.There was a impressed-current cathodic protection system for buried pipeline in the laboratory,and the test block power interruption method was applied to test the off potential and depolarization process of the buried pipeline.The experimental results showed that the off potential should be recorded at 50~100 ms after cutting off the power supply.If the potential difference-value between the off potential and depolarized potential matches the 100 mV cathodic protection criterion,the cathodic protection is valid,otherwise the pipeline will corrode.

关 键 词：阴极保护评价 试片断电法 断电电位 去极化过程 

分 类 号：TG174.41[金属学及工艺—金属表面处理]