Methods of preventing corrosion
- Alloying: The metals can be alloyed to prevent the process of corrosion. E.g: Stainless Steel
- Surface Coating: It involves the application of a protective coating over the metal. It is of the following types:
- Galvanization: It is the process of coating zinc on iron sheets by using an electric current.
- Electroplating: It is a method of coating one metal over another metal by passing an electric current.
- Anodizing: It is an electrochemical process that converts the metal surface into a decorative, durable and corrosion resistant.
- Aluminium is widely used for the anodizing process.
- Cathodic Protection: It is the method of controlling corrosion of a metal surface protected is coated with the metal which is easily corrodible. The easily corrodible metal is called Sacrificial metal to act as an anode ensuring cathodic protection.