Question

Which of the following is/are used for ammoniacal solution applications?

(a) Cast iron and steel

(b) 430 and 304 type stainless steels

(c) Cast iron, steel, 430 and 304 type stainless steels

(d) Copper and cast irons

The question was posed to me in semester exam.

This is a very interesting question from Environments in section Other Environments of Corrosion Engineering

Answer 1

The correct answer is (c) Cast iron, steel, 430 and 304 type stainless steels

To elaborate: Ammonia and ammoniacal solutions generally do not present a difficult corrosion problem. We usually use cast iron, steel, and 430, 304 type stainless steels for low and high temperatures respectively.