Rust is Iron Oxide.

So technically it's a mix of Iron and Oxygen.

Hi yes it is mixture of heat sunshine oxygen and a ferrous metal so steel which is a ferrous metal will rust when exposed to water vapours and heat in the atmosphere. as the air is made up of 20% OXYGEN AND 80 % NITROGEN. so rust happens facts of life.

rust is oxidized iron or iron oxide , its formed when iron atoms mix with oxygen from the air but it also involves water

H2O (hydrogen and oxygen) reacting with aluminium and steels