Abstract
Electrochemical polishing of aluminum and copper was conducted in 1 M phosphoric acid and in acid-free ionic liquid electrolyte prepared from quaternary ammonium salt as a green polishing solution. Voltammetry tests were used to determine the optimum condition for electrochemical polishing of aluminum and copper samples in both phosphoric acid and ionic liquid media. Atomic force microscopy (AFM), digital microscopy, and surface morphology comparisons summarized electrochemical polishing efficiency in term of surface roughness of acid and acid-free treatments for copper and aluminum. The eco-friendly ionic liquid produced polished surfaces superior to those surfaces produced with standard industrial acidic solution.
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