The spontaneous destruction of metals as a result of the interaction with the environment mainly oxygen is called corrosion. This happens because of the chemical interaction between the metals and their environment.
- Choosing the right type of metal can help control corrosion and reduce the requirement for additional prevention measures. For example, metals like aluminium and stainless steel are highly resistant to corrosion.
- One of the cheapest ways to control corrosion is by applying a layer of paint on the surface of the metal. This coating of paint acts as a barrier and protects the metal from corrosion by preventing the flow of electrochemical charge.
- The control over the constituents of the environment to which the metal is exposed can also help in the prevention of corrosion. An example of this would be the treating of water with softeners before putting it in a boiler to prevent corrosion inside the boiler.
- Prevention of corrosion can be done by treating the metal surfaces with phosphoric acid. It forms an insoluble phosphate coating on the surface which protects the metal from corrosion.