Investigation on the Aluminum-alloy Surface with Micro-pits Array Generating by through Double Mask Electrochemical Machining

For the status of low precision during micro-pit machining on the aluminum surface, a double mask electrochemical process is proposed. Pitting corrosion could be eliminated with higher current density and the lateral etching could be decreased with NaNO3 solution. Using optimized machining parameters, the uniform micro-pits array was produced on the aluminum-alloy surface. The experiment results showed that mask electrochemical process can improve machining localization on the aluminum surface.