Assertion: rust | /r/HasProperty | negative aspect of iron
Facets:
value: generally
type: DEGREE
Source sentences:
text: Although rusting is generally a negative aspect of iron, a particular form of rusting, known as "stable rust," causes the object to have a thin coating of rust over the top, and if kept in low relative humidity, makes the "stable" layer protective to the iron below, but not to the extent of other oxides, such as aluminium.