Question

Which of the following is/are the interface at which new metallic oxides (MO) are produced?

(a) Metal-scale interface

(b) Scale-gas interface

(c) Metal-scale interface or scale-gas interface

(d) Neither metal-scale interface nor scale-gas interface

I got this question in exam.

The above asked question is from High-Temperature Corrosion topic in section High Temperature Corrosion of Corrosion Engineering

Answer 1

Correct option is (c) Metal-scale interface or scale-gas interface

The explanation is: New metallic oxides (MO) is produced at a metal-gas interface or scale-gas interface based on the diffusion coefficient of metallic and oxygen ions in the metal matrix.