The current density
Posted on 11-03-2010The current density - J is the ratio of the current I to the machining area A. The current density is commonly expressed in amperes per square centimetres. Electrochemical machining is performed at high current density, usually tens or even hundreds of amperes per square centimetre.
Assuming an ohmic resistance of the electrolyte, the current I can be expressed as function of potential difference over the electrolyte Uelectrolyte and the resistance of the electrolyte Relectrolyte. The resistance of the electrolyte is directly proportional to the distance of the gap s and inversely proportionally to the electrolyte conductivity and the working area A.
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