Question

Which of the following law is used to derive the corrosion rate expression?

(a) Newton’s law

(b) Henry’s law

(c) Raoult’s law

(d) Faraday’s law

I got this question in semester exam.

This interesting question is from Corrosion Rate Expression topic in section Corrosion Principles of Corrosion Engineering

Answer 1

Right option is (d) Faraday’s law

The explanation is: Faraday’s law is used in order to derive the corrosion rate expression [W/At=I*am/n*F]. W/At denotes the corrosion rate, I=current density, am=molecular weight, n=number of electrons transferred, F=faraday constant (96500).