Question

Which of the following does not apply to cyaniding?

(a) Requires less time

(b) Operated at lower temperatures

(c) Low corrosion resistance

(d) Costly process

This question was addressed to me in an interview for job.

My question is taken from Nitriding, Cyaniding and Carbonitriding topic in portion Heat Treatment of Engineering Material & Metallurgy

Answer 1

Correct option is (c) Low corrosion resistance

Best explanation: The cyaniding process is an expensive process of surface hardening of steels which is applied to produce automobile parts. It requires lesser time and lower temperatures than carburizing. It also lowers warping and distortion while increasing the corrosion and wear resistance.