Which method involves applying a coating to prevent corrosion?

The method that involves applying a coating to prevent corrosion is protective coatings. Protective coatings serve as a barrier between the metal substrate and the environment, effectively preventing moisture, oxygen, and other corrosive agents from coming into contact with the metal surface. This application is crucial in extending the life of structures and components exposed to harsh environments.

Protective coatings can include various materials, such as paints, varnishes, and specialized coatings designed to resist specific types of corrosion. They are vital in industries such as construction, automotive, and marine, where the risk of corrosion can significantly impact safety and longevity. By implementing protective coatings, industries can reduce maintenance costs and improve the durability of their products and structures.