Which method protects an elevated storage tank against corrosion?

An elevated storage tank is susceptible to corrosion due to environmental factors such as moisture, temperature variations, and exposure to elements. Each of the methods mentioned actively contributes to preventing corrosion, making the collective answer the most comprehensive option.

Painting is a widely used method that provides a barrier on the surface of the tank, sealing it from moisture and other corrosive agents. By applying a layer of protective paint specifically designed for metal surfaces, it prevents direct contact with the atmosphere, reducing the effect of corrosion.

Cathodic protection is an electrochemical technique that involves the application of electrical current to counteract the corrosion process. This method uses sacrificial anodes or impressed current systems to protect the metal of the tank from corroding by making it the cathode in an electrochemical cell.

Water stabilization refers to adjusting the chemistry of the water in the tank to minimize its corrosive potential. By controlling factors such as pH, alkalinity, and hardness, stabilization reduces the likelihood of corrosion occurring due to aggressive water conditions.

Since all three methods have proven effectiveness in extending the life of elevated storage tanks by combating corrosion through different mechanisms, the best choice is to acknowledge that each method contributes to the overall protection strategy. Thus, the answer encompasses all methods, highlighting the