1. Iron (or steel) unfortunately corrodes alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc than most other transition metals and readily does so in the presence of both alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc (in air) and alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc to form an iron alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc. Iron corrosion is called alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc and the chemical change with oxygen is called an alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc reaction.

2. Iron and steel (an alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc of iron) are most easily protected by alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc which provides a barrier between the metal and air/water. Moving parts on machines can be protected by a water repellent alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc or grease layer.

3. This corrosion can be prevented by connecting iron to a more alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc metal (e.g. zinc or magnesium). This is called alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc protection. By mixing iron with other metals such as alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc you can make a non-rusting alloy called alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc steel. Coating iron or steel with a alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc layer is called 'galvanising'. The zinc preferentially corrodes first to form a zinc oxide layer that doesn't alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc off. However if a alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc reactive metal is attached, the iron then rusts alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc as it becomes the more alloychromiumfasterfirstflakelessoiloxidationoxideoxygenpaintreactiverustingsacrificialstainlesswaterzinc metal!