Question

what is rusting ......​

Answer 1

gerund or present participle: rusting

be affected with rust.

"the blades had rusted away"

Answer 2

Answer:

Rust is an iron oxide, a usually reddish brown oxide formed by the reaction of iron and oxygen in the presence of water or air moisture. ... Rusting is the common term for corrosion of iron and its alloys, such as steel. Many other metals undergo similar corrosion, but the resulting oxides are not commonly called rust.