Hard Anodizing or Hardcoat is an electrochemically produced grey layer of hard aluminum oxide on the surface of aluminum components. The coating grows integrally with the base metal and is corrosion and wear-resistant and machinable. The thickness can be very closely controlled and be applied to a wide range of parts to suit applications from many industries.

Hard Anodizing is a well-established process suitable for meeting today's demanding quality requirements. National and International standards provide a basis for the specification, production, and testing of the coating.