Electrochemical machining (ECM) is a non-traditional machining process
which is the controlled removal of metal by anodic dissolution in an electrolytic
cell in which the workpiece is the anode and the tool is cathode. In ECM, metal
removal rate (MRR) takes place due to atomic dissolution of work material.
Electrochemical dissolution is governed by Faraday’s laws.I n this study the ECM
is used to remove metal from the internal hole of the workpiece from aluminum
alloy using NaCl solution. The rates of improvement in MRR are (6.48, 1.81, 3.74,
13.24, 3.11) % for current densities of (2.82, 4.24, 5.65, 7.07, 8.48) A/cm2
respectively, when compared with the stationary tool, and the rotating electrode
gives better surface finish than the stationary electrode, were the enhancement rates
in roughness are (7, 31.72, 7.91, 15.49, 1.34)% for current density values of (2.82,
4.24, 5.65, 7.07, 8.48) A/cm2 respectively.