The charge modulated electrochemical machining (CM-ECM) process is an anodic metal dissolution process that is controlled by a charge modulated electric field (CMEF). The focusing or uniformity of the current distribution can be adjusted in the CM-ECM process by the unlimited combination of CMEF parameters, such as modulation frequency, forward/reverse duty cycle, and relaxation time. Therefore, the CM-ECM technology can be used for a variety of tasks like metal surface polishing, deburring, etching, and radiusing for a variety of surface finishing applications. This paper will present an effective surface finishing process for hard, passive alloys using the CM-ECM process to remove the damaged surface layer, defects, or edge burrs left by prior processing, such as EDM and mechanical machining.
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