Question

Corrosion of less corrosion-resistant metal is usually increased and the attack of the more corrosion-resistant is decreased in galvanic corrosion.

(a) True

(b) False

I got this question in an international level competition.

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

Answer 1

Right answer is (a) True

For explanation I would say: As galvanic corrosion is a bi-metallic corrosion, relatively less corrosion-resistant metal preferentially acts as anode and relatively high corrosion-resistant metal preferentially acts as a cathode. This increases attack on the less corrosion-resistant metal (anode) and decreases on high corrosion-resistant metal (cathode).