Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en rust300213355 A reddish powder composed of iron oxide and hydrated iron oxide that forms on the surface of iron and iron alloys. Rust is formed by the oxidation of iron in the presence of moisture. At least 40% humidity is required for the corrosion to occur. òxid óxido 2026-03-30 20:21:11