What is the purpose of cathodic protection?

Cathodic protection is a critical measure used to prevent corrosion of metallic structures, particularly steel tanks and piping used in underground storage systems. When metals are buried in soil or immersed in water, they can corrode due to electrochemical reactions with their environment. This corrosion can lead to leaks, contaminating the surrounding soil and groundwater, and potentially causing environmental hazards.

The process of cathodic protection involves using an electrical current to counteract the electrochemical reactions that cause corrosion. By doing so, it effectively extends the life of the steel tanks and piping, ensuring they remain secure and functional over time. This is particularly important for the integrity of underground storage tanks that hold petroleum products and other hazardous materials.

While monitoring fuel levels in tanks, preventing fire hazards, and regulating spill containment are all important aspects of managing underground storage tanks, they do not directly address the issue of corrosion in the tank and piping materials, which is the primary focus of cathodic protection.