What do cathodic protection systems for tanks commonly use along with sacrificial anodes?

Cathodic protection systems for tanks are designed to prevent corrosion, which can occur due to electrochemical reactions with the surrounding environment. To achieve this, these systems often utilize sacrificial anodes made of more electrochemically active metals, which corrode instead of the metal tank itself.

In many cases, a direct current power supply is used in conjunction with sacrificial anodes. This power supply provides a consistent flow of direct current that can enhance the cathodic protection process, ensuring that any potential corrosion is effectively mitigated. By applying direct current, it can help to create a more uniform and controlled protective current around the tank, thereby further extending its lifespan.

The other options do not align with the common practices for cathodic protection systems. Gas-powered generators are typically not needed for this purpose; alternating current systems are less effective for corrosion prevention compared to direct current; and while grounding rods may be used in electrical safety systems, they do not inherently contribute to the cathodic protection of tanks.