Common surface treatment methods for round steel include galvanizing, which involves coating the steel with a layer of zinc. This provides excellent corrosion resistance by forming a protective barrier. Another method is painting, where a layer of paint is applied to prevent rusting and also to enhance its appearance. Electroplating can be used to deposit a thin layer of other metals, such as chromium, to improve hardness and wear resistance. Shot - blasting is also used to clean the surface, remove rust and scale, and improve the adhesion of subsequent coatings.