ELECTROCHEMICAL METHOD TO IMPROVE CAVITATION RESISTIVITY OF COPPER ALLOY

摘要

PURPOSE: An electrochemical method for improving the cavitation resistivity of copper alloy is provided to remove or reduce the impact pressure of a cavity by inducing physical damage from hydrogen gas produced on the surface of copper alloy. CONSTITUTION: An electrochemical method for improving the cavitation resistivity of copper alloy comprises the steps of: inducing hydrogen overvoltage in an activation polarization region using a potentiostatic method and maintaining protective potential of -1.6 to -1.9V at the ultrasonic amplitude of 10 micron meters so that hydrogen gas is produced on the surface of copper alloy exposed to the seawater and the impact pressure of a cavity is removed or reduced.