Rust forms when iron or steel comes into contact with oxygen and moisture in the air. The chemical reaction between iron, oxygen, and water causes rust to accumulate on the surface of ferrous metals over time if left unprotected. Some common causes of rust include exposure to humid or damp environments, being submerged in water, road salt used in winter, or proximity to coastlines wit... https://prachicmi.livepositively.com/rust-remove-an-effective-way-to-remove-rust/new=1