Assertion: hafnium | /r/CapableOf | react in air
Facets:
value: to form a protective film
type: PURPOSE
Source sentences:
text: Hafnium reacts in air to form a protective film that inhibits further corrosion.
text: Hafnium does react in air to form a protective film that prevents any further reaction(s).
text: Hafnium reacts in air to form a protective film that inhibits further corrosion.