Question

What is the other name of galvanic corrosion?

(a) Bi-metallic corrosion

(b) Mono-metallic corrosion

(c) Localized corrosion

(d) Mono-metallic and localized corrosion

I had been asked this question during a job interview.

My doubt is from Eight Forms topic in portion Eight Forms of Corrosion of Corrosion Engineering

Answer 1

The correct answer is:

(a) Bi-metallic corrosion

Explanation:

Galvanic corrosion is also known as bi-metallic corrosion because it occurs when two different metals are in electrical contact with each other in the presence of an electrolyte. In this situation, one metal (the anode) corrodes more rapidly than the other (the cathode) due to the difference in their electrochemical potentials. This phenomenon is often referred to as bi-metallic corrosion because it involves two metals.

The other terms listed are not synonymous with galvanic corrosion:

• Mono-metallic corrosion refers to the corrosion of a single metal.
• Localized corrosion refers to corrosion that occurs in specific areas, such as pitting or crevice corrosion, but is not specifically related to galvanic effects.

Thus, bi-metallic corrosion is the correct term for galvanic corrosion.