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
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.