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Novel surface treatment process for light metal alloys

Connect, no. 110, January/February 2001, p.7

Components coated using the Keronite process
Components coated using the Keronite process

British company, Keronite Ltd, has installed a small-scale production and demonstration facility for coating aluminium, magnesium and titanium alloy components at TWI's headquarters at Abington. The Keronite process converts the alloy surface to a dense, wear and corrosion resistant metal oxide by means of a plasma electrolytic discharge from an aqueous solution. The process offers an environmentally friendly and technically superior alternative to wet coating processes, such as electroplating and anodising. Coatings can be deposited to a thickness of 400 microns. Keronite sells licences for this process. Possible applications include:

  • Automotive - pistons, cylinder blocks and liners, sliding bearings, wheels.
  • Aerospace - actuators and gears, structural elements, bearings and wheels, gas turbines.
  • Oil, gas and chemical - valves, pumps, hydraulic and pneumatic systems.
  • Cookware - frying pans, saucepans, knife sharpeners.
  • Medical - prostheses.
  • Printing - anilox rolls.

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