Induced AC Influence on Pipeline Corrosion and Coating Disbondment. Final Report,November 1993-September 1994

摘要

Gas transmission pipelines often share a common corridor with electric powertransmission lines. Magnetic-field coupling from the power line can induce ac voltage between the pipeline steel and the earth. With induced ac voltage on the pipeline, conditions that influence ac-enhanced corrosion and the efficacy of recognized cathodic-protection criteria are unknown. A preliminary laboratory investigation of general and pitting corrosion-rate enhancement by superimposed 60 Hz voltage, and the effectiveness of a recognized cathodic-protection criterion has been made.