The corrosion resistance of the nitrided layer is excellent in many environments. It is possible to induce both nitrogen and carbon atoms into the metallic surface simultaneously.

What does nitriding do to steel?

Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface. These processes are most commonly used on low-alloy steels.

Will black nitride rust?

A black nitride surface is very corrosion resistant, it doesn't corrode underneath as chroming or rust through as parkerizing does and is very durable.