Stray Corrosion Restrain of EDM of Titanium Alloy Machined in Water Using Auxiliary Electric Current.

A method of using auxiliary electric current to restrain the stray corrosion of EDM of titanium alloy machined in water is proposed. In the method, an auxiliary power supply is used to provide enough cathode current to make the metal interface electronegative, as a result of which, the stray corrosion is inhibited. The mechanism of stray corrosion and how to restrain it by auxiliary electric current are studied. The surfaces of titanium alloy machined before and after adopting auxiliary electric current are tested by several means, such as electric field simulation analysis, electrical discharge machining tests, surface morphology and component analysis, and so on. The experimental results show that the auxiliary electric current can efficiently eliminate the stray corrosion of EDM of titanium alloy machined in water. [ABSTRACT FROM AUTHOR]