Acorn Surface Technology
Hard Anodising

Volume anodised automotive
We are the country's leading Hard Anodising specialists (aluminium anodisers) - our clients are generally leading businesses in Aerospace, Defence and Automotive sectors

Hard anodising produces a relatively dense, thick oxide layer. As a result, the film will tend to be darker in appearance although the final colour is largely dependent on the alloying constituents (elements) of the base material and, in its natural state, can be anything from light green/gold to dark grey/charcoal. 

The use of Hard anodising has become very important where weight saving (e.g. by the use of Aluminium instead of Steel) combined with good corrosion protection and wear resistance are required. Also unsealed anodic coatings can absorb and retain oil when used on sliding surfaces for cylinders and pistons etc, providing longer lasting lubrication. 

Applications include: 

  • Pistons
  • Cylinders
  • Hydraulic actuators
  • Braking systems
  • Marine and Offshore applications
  • Fuel systems
  • Aircraft components
  • Gears


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(previously Acorn Surface Technology Ltd)

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