Question

Which of the following is correct regarding Polarization?

(a) It is the deviation from equilibrium potential

(b) It results from the change in net current flow

(c) Magnitude is measured in terms of overvoltage

(d) It is the deviation from equilibrium potential that occurred due to the change in net current flow and its magnitude is measured in terms of overvoltage.

The question was posed to me during an interview.

My question is based upon Modern Theory Principles topic in portion Modern Theory Principles of Corrosion Engineering

Answer 1

The correct answer is:

(d) It is the deviation from equilibrium potential that occurred due to the change in net current flow and its magnitude is measured in terms of overvoltage.

Explanation:

In corrosion engineering, polarization refers to the deviation of an electrode’s potential from its equilibrium value due to a change in net current flow. This deviation is measured as overvoltage, which quantifies the extent of polarization. Polarization can occur due to various factors, such as concentration changes near the electrode or resistance within the electrochemical system.

This option provides a comprehensive definition of polarization, encompassing both the cause (change in net current flow) and how it is measured (overvoltage).