What does the term "stray current" refer to in relation to USTs?

The term "stray current" specifically refers to electrical currents that can lead to corrosion in the context of Underground Storage Tanks (USTs). This phenomenon occurs when electrical currents inadvertently find their way into structures, such as tanks or pipelines, which can disrupt their integrity over time. Stray currents often originate from external sources, such as nearby electrical systems or the grounding of electrical installations. If not properly managed, these currents can accelerate the corrosion of metal components, thereby compromising the safety and functionality of USTs.

Understanding this concept is crucial for service technicians working with USTs, as it emphasizes the need for effective corrosion control measures, such as cathodic protection systems, to mitigate the risks associated with stray current. This awareness ensures the longevity of the tanks and ensures compliance with safety regulations.