Synergistic erosion-corrosion behavior of Al-brass alloy at various impingement angles

Erosion and erosion-corrosion behaviors of the Al-brass alloy were investigated using a slurry impingement rig at a velocity of 6 m/s under impingement angles ranging from 20° to 90°. The maximum erosion and erosion-corrosion rates occurred at an impingement angle of 40°. The results showed positive synergisms at all impingement angles. The rate of erosion enhanced by corrosion showed values up to 54% of the total erosion-corrosion rate. Polarization curves showed a passive behavior in the stagnant condition. No passivation was observed in the flow and erosion-corrosion conditions indicating low durability of protective layers on the Al-brass alloy at jet velocity of 6 m/s.