AC Mitigation and Cathodic Protection: How Decouplers Make a Difference

Decouplers are a critical component of AC mitigation systems; they greatly enhance cathodic protection performance by isolating CP systems while maintaining a low-impedance path to earth for AC and lightning. This prevents CP current from flowing through and damaging earthing systems.

Pipeline AC interference, caused by high-voltage AC power or railway lines running near buried pipelines, poses serious risks and challenges. Too often, practical and long-term solutions are overlooked for short-term cost savings, leading to accelerated pipeline corrosion and personnel safety hazards. To address these potential issues, AC mitigation systems are becoming an increasingly adopted practice worldwide. Operators must assess the degree of AC interference on their pipelines—including AC voltage potentials and current density levels—and then implement monitoring and mitigation plans whenever results exceed industry thresholds. This whitepaper provides a foundational understanding of AC mitigation, its impact on CP potentials, and the role of decouplers. Download your free copy today.

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