| 简介 |
PROBLEM TO BE SOLVED : To provide a method which excludes temporarily an electrical influence of the cathode anticorrosion facility at a specific position, on a pipeline net work which is connected with a plurality of cathode anticorrosion facilities.
SOLUTION : An electric source of the cathode anticorrosion facility C1 is on-off controlled for the time from a set starting time to finish time, by selecting the cathode anticorrosion facility C1 which is set at a position remote from a specific position S in the pipeline network Pn. Within the time between set starting time and the finish time, the anticorrosion management value (potential between pipe and earth) of the specific position S is measured in the pipeline network Pn. It is determined whether the measured result of the anticorrosion management value (potential between pipe and earth) is influenced by the on-off control or not. If it is determined that the measured result of the anti-corrosion management value is influenced by the on-off control.The selected cathode anti-corrosion facility becomes the object of the power off. BY extending one by one the set distance, similarly, the determination is performed on the cathode anti-corrosion facilities C2, C3, ... as the objects, and all the cathode anti-corrosion facilities as the objects of power-off are determined.
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