rusting vs corrosion

rusting and corrosion both are nouns.

Word	Noun	Adjective	Verb	Adverb
rusting	Yes	No	No	No
corrosion	Yes	No	No	No

As nouns, corrosion is a hypernym of rusting; that is, corrosion is a word with a broader meaning than rusting:

rusting: the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
corrosion: erosion by chemical action

Other hypernyms of rusting include corroding, erosion, oxidation, oxidisation, oxidization.

rusting (noun)	corrosion (noun)
the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water	erosion by chemical action
	a state of deterioration in metals caused by oxidation or chemical action