Cavitation Erosion Behavior in the Rotational Blade with Various Metals

In this study, experimental cavitation erosion is carried out on different types of rotational models (gray cast iron, aluminum 1100, aluminum 6061 and chromium stainless steel) at constant rotational speed, temperature and cavitation number in a cavitation closed tunnel. The weight loss rate and the behavior of corrosion were analyzed with SEM and optical microscopes. The effect of the rotational speed variation on the cavitation erosionwas evaluated for models of different materials. The findings significantly showed that the diameter of the holes is independent from rotational speed and with increased rotational speed, the number of the holes and the cavitation erosion escalate. The study revealed that chrome stainless steel model has a higher resistance against cavitation erosion. The relationships between weight loss rate and rotational speed are further presented.