Hard Anodising
This process is used to produce a thicker aluminium oxide compared to the standard sulphuric acid process, resulting in an extra durable surface layer with increased wear resistance.
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We are able to anodise a variety of aluminium alloys at controlled thicknesses, including specialist high copper.
The micron thickness range for this finish is 25 to 100 microns (depending on the alloy used).
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Available in clear and a variety of colours: black, red, orange, yellow, green, blue, purple, pink and gold.
This finish appears duller than sulphuric anodising.
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Nickel acetate seal, demineralised hot water seal and PTFE seal (providing the lowest coefficient of friction of any solid) are available.
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We are able to anodise to the dimensions of: 2.1m x 0.8m x 0.9m. ​
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Profile
Hard anodising is very similar to sulphuric anodising - it is the electrochemical process of producing a layer of aluminium oxide onto the surface of aluminium. However, a thicker oxide layer is produced, therefore producing a hard wearing finish with high electrical insulation properties. The hard anodising process, including passivation, is entirely chromium VI free and so meets the requirements of the latest legislation.