Electrochemical machining (ECM) is a modern machining process that
relies on the removal of workpiece atoms by electrochemical dissolution
(ECD) in accordance with the principles of Faraday (1833). Gusseff
introduced the first patent on ECM in 1929, and the first significant
development occurred in the 1950s, when the process was used for
machining high-strength and heat-resistant alloys.