埋地管道牺牲阳极阴极保护中a和E<sub>0</sub>的确定

埋地管道牺牲阳极阴极保护中a和E₀的确定

摘要: 通过对埋地煤气管线实施牺牲阳极阴极保护的大量测试数据,经系统整理分析,得出电位衰减系数a与修正系数r和涂层电导之间的关系,以及通电点管地电位偏移量E₀的计算公式。

Abstract: The equation of negative shift “E₀” of pipe/ground potential at connection point, the relation-ship between potential attenuation coefficient “a” and calibration coefficient “r” as well as electric conductivity “g₁” of coating are dedueecl by systematic analysis a vast amount of experimental data collected from cathodic protection system of underground pipelines with sacrificial anodes.