The tidal-induced telluric electric field not only induces tidal earth currents in buried metallic pipelines but also affects the pipe-soil potential (PSP) of coastal pipelines, significantly increasing the corrosion risk. Conventional potential testing methods struggle to accurately evaluate the influence range, fluctuation amplitude, and trends in pipeline corrosion caused by this dynamic quasi-DC interference from tidal phenomena. To address these issues, this study established an online tidal interference monitoring platform based on ER probe technology and GPS synchronized acquisition technology on a coastal oil and gas pipeline in Shandong, China, which experiences significant tidal interference. Field monitoring results were used to analyze environmental parameters, such as soil resistivity, the status of stray current interference and tidal range around the pipeline. Furthermore, by examining the variation amplitude and patterns of the pipeline's on-potential, off-potential and tidal range, the degree of tidal interference impact on the pipeline was demonstrated. This research provides a practically valuable reference method for constructing tidal interference testing platforms for coastal pipelines, contributing to the safe operation of coastal oil and gas pipelines.
