An impressed current CP system can subject an adjacent pipeline to what?

An impressed current cathodic protection (CP) system is designed to protect pipelines from corrosion by supplying a steady flow of direct current to the metal being protected. This process can create an electric field that extends beyond the immediate area of the protected pipeline, potentially affecting adjacent pipelines. The phenomenon that can occur is known as stray current interference.

Stray current interference happens when the electrical current meant to protect one pipeline inadvertently affects another pipeline running nearby. This unintended impact can lead to corrosion on the adjacent pipeline if the current alters the corrosion potential or if it causes an imbalance in the protective measures being employed. The other options, while they may relate to electrical systems in certain contexts, do not adequately describe the effects of an impressed current CP system on adjacent pipelines. Stray current interference is a specific and critical concern that must be managed in the design and operation of cathodic protection systems to ensure the integrity of all pipelines involved.