The insulating resistance on the coating surface of buried pipelines is a very important parameter which is directly concerned with the cathode protection effect.
地下管道涂层表面绝缘电阻是直接关系到阴极保护效果的一项重要参数。
After comparing and analyzing several conventional insulating resistance measuring method such as AC method, DC creepage method and so on, their shortcomings in use are pointed out.