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Hardcoat anodising is a variation of anodic oxidation. Particulary hard and abrasion-proof oxide layers are generated on aluminium alloys thus allowing that these materials can be used for special applications. These layers are made in a cooled electrolyte by using direct current through the conversion of aluminium into aluminium oxide.

The pores of those layers are more compact and smaller in diameter compares to common anodised layers. Hardcoat anodised layers show a self coloring from grey to brown which is due to the alloy. Mainly thicknesses ranging between 30 - 60 microns are used and the outgrowth is only about 50%.

Max. dimension of component: 3200 x 1750 x 500 mm

Fields of application

  • Medical technology
  • Aerospace technique
  • Packaging technique
  • Hydraulics and pneumatics
  • Drive technology
  • Vacuum technique
  • Paper industry


  • Excellent corrosion and abrasion resistance
  • High hardness 400 – 500 HV, depending on the raw material
  • Good reproducibility
  • Thickness +/- 5 µm
  • Can be used safely – even in the event of incidental food contact
  • Ideal dimenional accuracy and throwing power
  • Good electrical insulation
  • Outstanding anti-friction properties which can be improved by a PTFE treatment
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