The iron/electrolyte interface at extremely large current densities

Electrochemical Machining (ECM) is a technique to shape metal parts by anodic dissolution in neutral solutions (e.g. aqueous NaNO 3 ) at extremely large current densities of about 100 A cm -2 . We developed a capillary based microcell to simulate this process in the laboratory and to simultaneously analyze the products by UV-Vis spectroscopy. In addition, a brief overview of electrochemical micro techniques is given.