Iron is a metal that is highly susceptible to rusting. It is the most common element on Earth and is found in many forms, including ore, steel, and cast IRON. IRON is an essential component of many structures and machines, and is used in a variety of industries. Rusting occurs when IRON is exposed to oxygen and moisture, which causes it to corrode and weaken. Rust can cause significant damage to IRON structures, making it important to take preventive measures to protect against rusting.