The state of art in alternating current (AC)-induced corrosion in pipelines is reviewed. Growing pipeline networks and their co-location with high-voltage (HV) transmission networks have brought into focus the issue of induced AC corrosion on the pipeline networks. Induced AC corrosion may quickly and severely affect the integrity of pipeline networks, especially considering that a number of such pipelines are transporting huge quantities of hazardous fluids. Any breach in pipeline integrity due to AC corrosion may result in disastrous consequences. In the last 30 years, it has been established that the induced AC corrosion can affect the buried pipeline integrity severely. During operations, the resistive as well as inductive coupling with transmission lines pose a significant risk of pipeline corrosion. The literature is reviewed to put together various issues and factors responsible for AC-induced corrosion in pipelines. The various publications on induced AC corrosion are reviewed to identify characteristics of AC-induced corrosion and major factors that determine the severity and impact of AC-induced corrosion. The areas have been identified wherein scope exists for additional studies on AC corrosion.

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The purpose of this paper is to predict and mitigate AC interference on buried pipeline systems due to transmission lines. Modeling and field verification of AC interference is done. The article also presents the issue of optimizing the mitigation measures. The paper uses the field data on soil resistivity, transmission line, and pipeline details to develop a model using current distribution electromagnetic interference grounding and soil structure analysis (CDEGS) software to predict the AC interference on the pipeline system. The model is validated with field measurements, and post-mitigation measures are considered. Mitigation measures are optimized to develop an economical mitigation plan. The case demonstrates the use of modeling techniques to predict and mitigate AC interference on pipelines. The field validation of modeling results helps improve the modeling results and plan optimized mitigation measures. The study requires providing comprehensive field data relevant to the pipeline system under consideration. The accuracy of the field data may have a bearing on the outcome of the study. The study enables designing and optimizing mitigation measures using modeling. Comparisons with field measurements help achieve desired pipeline system integrity against AC corrosion.