Lightning Protection for Cathodic Systems
One of the common practices to prevent electrochemical reactions that cause pipeline corrosion is impressed current cathodic protection. An impressed current cathodic protection system is comprised of cathodic protection control cabinets along a pipeline. A typical cabinet includes a controller, sensitive AC/DC rectifiers, current measuring and limiting circuits, and remote communication circuits.
Lightning strikes on pipelines, near the pipeline, and on power transmission lines introduce high voltage and high current surges into the cathodic protection circuitry. Damage to AC/DC rectifiers and control circuits can result from inadequate or no lightning protection within the cathodic protection control panel. Corrosion protection on pipelines and storage tanks is critical, as any failure to the system can lead to leaks, potentially causing catastrophic fire or spills.