极化电位对埋地钢质管道涂层剥离的影响

Effect of Polarization Potentials on Coating Stripping of Buried Steel Pipelines

为了研究提高埋地钢质管道阴极保护电位对管道涂层剥离的影响,对退役的埋地管道提高保护电位,收集管道的通电电位和断电电位数据,并测量涂层的阴极剥离距离。结果表明:当断电电位达到-1.2 V时,管道的通、断电电位绝对值并不一定随着距离的增加而减小;此外,不同防腐涂层管道的阴极剥离距离不同。

In order to study the effect of cathodic protection potential on coating stripping, the protection potential was improved, the on potential and instant-off potential data of buried pipline were collected, the distance after coating stripping was measured. The results show that when the instant-off potential is 1.2 V, the on potential and instant-off potential decrease with the increase of distance, but at some off potential. The stripping distance damage points this rule can not be met to the absolute value of the on potential and instantfor different anticorrosive coating pipelines is not the same