shaping-manufacturing-processes > Electrochemical Machining (ECM)

Electrochemical Machining uses the same mechanism as metal plating, however it works in reverse. The component forms the anode of the electrical circuit, this is placed in close proximity to an electrode (cathode). A high-amperage direct current is then passed between the component and the electrode through an electrolyte, such as salt water.

Metal is removed by anodic dissolution and is carried away in the form of a hydroxide in the electrolyte for recycling or recovery.