Define critical velocity regarding erosion-corrosion. A. Velocity

define-critical-velocity-regarding-erosion-corrosion-a-velocity

Define critical velocity regarding erosion-corrosion.

A. Velocity at which erosion-corrosion starts

B. Velocity at which erosion-corrosion stops

C. Velocity after which erosion-corrosion increases exponentially

D. Velocity after which erosion-corrosion decreases exponentially

I got this question during an internship interview.

The origin of the question is Eight Forms topic in section Eight Forms of Corrosion of Corrosion Engineering

Correct answer is C. Velocity after which erosion-corrosion increases exponentially

The explanation is: Critical velocity is the velocity after which the erosion-corrosion increases exponentially. Case 1 (velocity less than critical velocity):

Erosion corrosion increases linearly with increase with velocity.

Case 2 (velocity greater than critical velocity):

Erosion corrosion increases exponentially with increase with velocity.