How are above-ground tanks and piping protected from corrosion?

Above-ground tanks and piping are particularly susceptible to corrosion due to their exposure to the elements and the materials they contain. The correct approach to protect these structures involves two primary methods: cathodic protection and the application of protective coatings.

Cathodic protection works by using electrical methods to control the corrosion of a metal surface. This is often achieved by connecting the metal to be protected to a more electrochemically active metal (the anode) which corrodes instead of the protected metal. This method is particularly effective for metal tanks and piping, extending their lifespan significantly.

In addition to cathodic protection, protective coatings serve as a barrier between the metal surface and the environment. These coatings can prevent moisture and corrosive substances from coming into contact with the metal, thereby reducing the rate of corrosion. The combination of these two methods effectively mitigates the risk of corrosion, ensuring that tanks and piping retain their integrity over time.

The other options provided do not adequately address the issue of corrosion protection in above-ground tanks and piping. Regularly changing the water source does not prevent corrosion; instead, it could introduce new corrosive elements. Using plastic materials avoids corrosion but is not feasible for all applications, especially when structural integrity is crucial. Keeping water at high temperatures