On the basis of analyzing typical impact erosion and cavitations erosion test equipment and methods in sandy environments,in view of the special wear patterns in our national hydraulic machinery and hydraulic architecture,a new type of water jet test equipment and method that can be applied to study submerged synergic wear of impact erosion & cavitations erosion was introduced.

An experimental system,based on the magnetic field theory and the ultrasonic vibrancy theory,was designed,and the experiments show that the average roughness value of the surface by compound-finishing.