Difference between current test pile and potential test pile

Potential test post: it is mainly used to detect the protection potential. The measurement method is to test the protection potential of the pipeline with cathodic protection by using the digital multimeter and Cu / CuSO4 (CSE) through the test pile, and indirectly evaluate the quality status of the coating through the potential distribution.


Current test pile: measure the current in the tube, the current detection technology in the tube, also known as multi frequency tube current method (also known as current attenuation method). The principle of equivalent current is used to evaluate the insulation resistance of anticorrosive coating. During the detection, the transmitter sends a signal current of a certain frequency to the pipeline, and when the current flows through the pipeline, the corresponding magnetic field is generated around the pipeline; when the external anti-corrosion coating of the pipeline is in good condition, the current is more balanced with the extension of the pipeline, and there is no current loss phenomenon or less loss, and the magnetic field generated around the pipeline is relatively stable; when the external anti-corrosion coating of the pipeline is damaged or aged, it is at the damaged place There will be a loss of current phenomenon, with the extension of the pipe, the intensity of its magnetic field around the pipe will be weakened.


Shandong Linyi Bosi conductive materials Co., Ltd. is a high-tech enterprise specializing in the production of MMO flexible anode, conductive polymer flexible anode and titanium coated anode, mainly providing cathodic protection technology, engineering design, installation and technical services.