Question

Define the distance effect regarding galvanic corrosion?

(a) Corrosion occurs only at the junction of two metals

(b) Corrosion occurs only at the edges of two metals

(c) Corrosion decreases with increase in distance from the junction

(d) Corrosion increases with increase in distance from the junction

This question was addressed to me in an online quiz.

My question is based upon Eight Forms in chapter Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct option is (c) Corrosion decreases with increase in distance from the junction

Explanation: The galvanic effect is the potential difference formed between two or more metals at its junction. It decreases on moving away from the junction. Hence corrosion decreases with an increase in distance from the junction.