Rust: The Famous Inorganic Reaction on Iron

Rust is the common name for hydrated iron oxides that form when iron reacts with oxygen and water.
It weakens metal by creating a flaky, brittle surface that breaks away over time.
The reddish-brown color of rust comes from iron(III) oxide, one of its main compounds.
Salt accelerates rusting by boosting the electrochemical reactions on metal surfaces.
Rust is a type of corrosion, but not all corrosion produces rust—only iron and steel do.
Protective coatings like paint, oil, or galvanization help block oxygen and moisture.
Stainless steel resists rust because chromium forms a thin, stable oxide layer.
Rusting is essentially a slow-burning process, like iron reacting with oxygen in a damp flame.
Historical landmarks, from bridges to ships, require constant rust prevention and repair.
Rust reminds us that even strong iron is vulnerable to the chemistry of air and water.