SUMMARY Cavitation often occurs in inducer pumps of space rockets. Silver plated coatings on the inducer liner face the damage of cavitation. In this study, we carried out cavitation erosion tests using silver plated coatings with different thermodynamic parameters at a constant cavitation number. Then we carried out cavitation erosion tests using some liquids with the same thermodynamic parameter and cavitation number as liquid oxygen. The thermodynamic parameter proposed by Brennen was used. The liquids used for the cavitation erosion tests were water, ethanol and hexane. We discuss the relation between the thermodynamic parameter and the mass loss rate, and the relation between acoustic impedance and the mass loss rate
