Question

Which of the following is/are the class1 corrosion resistance materials in hydrochloric acid?

(a) Chlorimet 2 and Chlorimet 3

(b) Hastelloy B and C

(c) Zirconium and molybdenum

(d) Chlorimet 2 and 3, Hastelloy B and C, Zirconium, Molybdenum and Tantalum

The question was posed to me by my college director while I was bunking the class.

Origin of the question is Mineral Acids in division Mineral Acids of Corrosion Engineering

Answer 1

The correct option is (d) Chlorimet 2 and 3, Hastelloy B and C, Zirconium, Molybdenum and Tantalum

To explain I would say: Class1 materials are the materials that are used for a particular environment and it is generally recommended for a variety of conditions of temperature and concentration. Class1 materials for hydrochloric acid include Chlorimet 2 and 3, Hastelloy B and C, Zirconium, Molybdenum, and Tantalum.