FIELD: corrosion prevention. SUBSTANCE: to increase length of corrosion prevented part of pipeline anode grounding rods 6 - 1 are mounted in zone of their mutual influence and shifted in respect of each other in direction, that is perpendicular to direction of subjected to corrosion prevention pipeline. In the case, area of outside surface of anode grounding rod, located near corrosion prevented structure, is made smaller, than outside surface of anode grounding rod, that is spaced for bigger distance from structure. EFFECT: apparatus is used in systems of cathode protection of trunk pipelines. 3 dwg
