Hard Anodising is an electrolytic process used to increase the thickness of the natural oxide film on the surface of Aluminium and its Alloys and produces a very hard corrosion resistant insulated surface.
Anodising thicknesses can range from 25 microns to 75 microns depending on the Alloy being processed and produce a hard surface with readings of up to 800VPN.
The colour can vary from light to dark grey depending on thickness with the option of being dyed black, other colours can be made available upon request.
We can mask off areas where Anodising is not required.
A secure contact point is required due to the current needed to produce the Hard Anodised coating.
The resulting finish depends on the aluminium alloy but is generally light grey.
Films can be dyed to any colour by prior agreement but black is always available.
Anodising produces an insulated surface, however this can be masked to limit the areas treated.
Hard anodising is not usually sealed after processing as this can cause the film to become brittle.
Items to be anodised require a secure electrical contact and this can result in a mark on the surface. The electrical contact point can be a tapped hole but this must be agreed before work commences.
Anodising dissolves some of the surface aluminium and the resulting growth is about half the film thickness produced.
Hard anodised films are very resistant to corrosion.