CP Potential Measurement and Evaluation of Pipeline Undergoing Dynamic DC Stray Current Interference from Metro System

For the buried steel crude oil pipeline being interfered by the dynamic DC stray current of subway, a test potential collector was used to measure the power-off potential of cathodic protection polarization test piece. The results show that the test method was simple and easy, the data was accurate and reliable, and it had greater technical advantages compared with the traditional test method.