: Widely used in petroleum, chemical engineering and other fields of power, protective sleeve inside the pipe, pipeline cathodic protection temporarily, tank and pipe network protection, usually for less than the resistivity 2000Ω.cm medium, if the protected steel structure has a good coat or wet conditions in the soil, the zinc anode can be used with higher 2000Ω.cm media, in order to improve the performance of zinc ribbon anode can be filler. Mainly used for high resistivity environments, performance: flexible performance, easy installation, easy to make a variety of lengths and shapes of the anode, such as spiral, discoid; uniform current distribution, high current efficiency, greater than 95%; no external power strip with a continuous conductive core, electrical connection less; available locally through narrow places and difficult circumstances, the application more flexible; unit weight of ground resistance, current is large;