The degree to which the electropolishing process is controlled determines the final quality and consistency of a metal's finish. Many electropolishing shops employ, at best, a minimum number of controls, or no controls at all, resulting in inconsistent and unpredictable quality. While some controls are functions of technology, others fall under what many call "the art of electropolishing."
The "science" of electropolishing involves the careful monitoring of several variables: the proper electrolyte must be used at the correct temperature; a clean supply of DC power must be supplied at the correct voltage and density; and the solution's specific gravity, acid concentration and metals content must all be monitored carefully.
The "art" of electropolishing involves the ability of a technician with many years of experience to configure a cathode for optimum polishing in inaccessible areas, corners, and areas of low current density. Equally important is the knowledge of where, when and how to agitate either the electrolyte or the part in order to prevent gassing streaks, flow marks and similar undesirable markings.
