What is the primary function of a Zinc-rich Coating?

The primary function of a zinc-rich coating is to provide cathodic protection to steel surfaces. Zinc-rich coatings contain a high percentage of zinc dust, which, when applied to steel, acts as a sacrificial anode. This means that the zinc will corrode preferentially, protecting the underlying steel from rust and corrosion. Through the process of galvanic protection, the zinc sacrifices itself to ensure that the steel remains intact and free from corrosion.

In contrast, while improving paint adhesion, providing aesthetic finishes, and enhancing flexibility may all be desirable qualities of various coatings, they do not represent the main purpose of zinc-rich formulations. Such coatings are primarily designed to protect steel structures in harsh environments, making cathodic protection their essential and defining function.