Question

The molten baths used in liquid carburizing are composed of _________

(a) 20-50% sodium cyanide, 40% sodium carbonate

(b) 40% sodium cyanide, 20-50% sodium carbonate

(c) 10% sodium cyanide, 20% sodium carbonate

(d) 20% sodium cyanide, 10% sodium carbonate

The question was asked in a job interview.

The question is from Carburizing topic in portion Heat Treatment of Engineering Material & Metallurgy

Answer 1

Right choice is (a) 20-50% sodium cyanide, 40% sodium carbonate

The explanation is: Liquid carburizing is carried out in molten salt baths. These baths contain 20-50% sodium cyanide, 40% sodium carbonate, along with varying quantities of sodium or barium chloride. It is also known as salt carburizing.