Precise Electrochemical Machining (PEM) is a powerful metal shaping process, ideal for simultaneously creating complex macro- and micro-structures in extremely hard or exotic materials which are difficult to machine with conventional methods — like superalloys (Inconel, Hastelloy), powdered metal, and titanium alloys.
A non-contact process, PEM uses electric current and an oscillating tool in a conductive electrolyte (salt water) to dissolve metal by liquefication. A positively charged workpiece (the anode) takes the form of the negatively charged tool (the cathode). The result is a burr-free part without thermal or mechanical stresses, microcracks, white layers or electrode wear.
Step-by-step: How does the PEM process work?