Question

Which of the following principle is utilized in the concept of cathodic protection?

(a) Principle of galvanic corrosion

(b) Principle of crevice corrosion

(c) Principle of pitting corrosion

(d) Principle of selective leaching

This question was addressed to me in final exam.

This intriguing question comes from Eight Forms in portion Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct answer is (a) Principle of galvanic corrosion

Best explanation: Cathodic protection is a protection of a base structure metal by making it as a cathode. It can be protected by the use of sacrificial anode. The order of metals in the galvanic series is the basis for cathodic protection.