Question

What is the primary condition regarding the velocity of an electrolyte to form crevice corrosion?

(a) The velocity of the electrolyte should be greater than 10cm/s

(b) The velocity of the electrolyte should be less than 10cm/s

(c) The velocity of the electrolyte should be equal to 10cm/s

(d) The stagnant electrolytic solution should be present

I got this question in quiz.

I need to ask this question from Eight Forms in division Eight Forms of Corrosion of Corrosion Engineering

Answer 1

Correct choice is (d) The stagnant electrolytic solution should be present

Easiest explanation: Crevice corrosion occurs due to the presence of stagnant electrolytic solution in the crevices. It acts at the corrosion sites and it results in the formation of localized corrosion. An increase in the velocity of the electrolyte decreases the extent of crevice corrosion.