Investigation into Morphology of Cavitation Erosion-Corrosion Pits on the Surface of Carbon Steel

Abstract

Nano-sized films associated with the ring areas formed around micropits in cavitation erosion experiments were investigated. The corrosion behavior and vibratory cavitation erosion tests of mild carbon steel in 3% NaCl distilled water were carried out. The results showed that the nano-sized films associated with the ring areas formed around micropits in cavitation and free cavitation tests have a similar shape. The study proved that the nano-structure and the ring areas formed around micropits are the result of corrosion effects and not as a result of thermal effects related to the collapse of the bubbles.