Assertion: rust's alloy | /r/MadeOf | iron
Facets:
Source sentences:
text: Rust is a general name for a complex of oxides and hydroxides of iron, which occurs when iron or some alloys that contains iron are exposed to oxygen and moisture for a long period of time.
text: Rust can occur when iron (or an alloy containing iron) is exposed to moisture and oxygen for an extended period of time.
text: Rusting is commonly referred to as oxidation and takes place when iron or metal alloys containing iron (i.e. steel) are exposed to water and oxygen for extended periods.