Process Surface coating processing the workpiece through an anode-cathode reaction in a salty solution is coated with a thin and ductile layers of zinc.
Process Polishing process where the workpiece is immersed in a heated electrolyte and where the workpiece is subjected to a current so that its surface is partially ionized and dissolved.
Process Surface coating process where an aluminum workpiece that acts as the anode is subjected to high voltage and is oxidized in a cooled acidic solution which creates a corrosion-resistant and durable surface.