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Electropolishing Process & Definition Infographic

The Electropolishing Process

Learn more with this detailed explanation of the process behind electropolishing. With definitions provided for each step in the electropolishing process, this infographic is a great learning tool for any audience!


What is Electropolishing?

Electropolishing is a reverse plating process where surface particles are pulled off the surface when DC electricity is applied.


Electropolishing Process

  1. Electrolyte: A power source converts AC current to DC at low voltages. A tank is filled with a phosphoric and sulfuric acid solution.
  2. Cathode: The edge of the tank is lined with cathode (usually copper) plates that are installed to the negative side of the DC power source. A part or group of parts is fixture to a rack, which is fixture to the positive side of the power source.
  3. Workpiece to be polished: The metal workpiece (anode) to be electropolished is made anodic by connecting to the positive side of the DC power source and immersed into the temperature-controlled bath of electrolyte.
  4. Particle moving from the workpiece to the cathode: An electrical current passes from the anode, where metal ions on the surface are oxidized and dissolved in the electrolyte, to the cathode.


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