An investigation of cavitation erosion behavior of casting Cu-based alloy

Casting Cu-based alloy is a common industrial propeller alloy. The relative popularity of this alloy is due to its mechanical and cavitation-resistant properties. In this study, cavitation erosion behavior of this alloy was investigated using ultrasonic vibratory facility conforming to ASTM Standard G32-92 in distilled water and 3.5% NaCl aqueous solution. Scanning electron microscopy (SEM) showed that cavitation made the surface of this alloy very rough, with large cavities or pits. Also, the weight loss of sample and depth of pits increased when cavitation tests carried out under corrosion condition, in 3.5% NaCl aqueous solution. Finally, polarization test were utilized to investigation of corrosion behavior of samples

Keywords:

Cavitation , corrosion , synergistic