A galvanic cathodic protection system for an underground storage tank is primarily designed to protect which element?

A galvanic cathodic protection system is specifically designed to prevent corrosion of metallic structures, particularly underground storage tanks. This system operates by using sacrificial anodes, which are more reactive than the metal of the tank. The anodes corrode preferentially, thereby providing protection to the tank itself.

While a galvanic cathodic protection system can indirectly benefit surrounding soil and connected pipelines, its primary function is to safeguard the integrity of the tank. This protection is critical, as corrosion can lead to leaks and other failures that can have serious environmental and safety implications. Therefore, understanding that the main focus of this protective system is the tank's metallic structure reaffirms its importance in the management and operation of underground storage tanks.