|Anodic Film Thickness BS1615 |
Minimum Average Thickness
|Grade ||Microns ||Inches |
|AA35 ||35 ||0.0014 |
|AA25 ||25 ||0.0010 |
|AA15 ||15 ||0.0006 |
|AA10 ||10 ||0.0004 |
|AA5 ||5 ||0.0002 |
|AA3 ||3 ||0.00012 |
The initial production of your special extrusion will leave your product with what is termed 'mill finish'. This can be enhanced in many ways, the reasons for doing so are twofold. Firstly, to change the appearance of the product to give aesthetic appeal and secondly to add a form of protection.
Decorative Sulphuric Anodising
Decorative sulphuric anodising is the most common form of anodising, it provides a decorative finish and protection from corrosion. Common examples of this finish include door handles and window frames. Decorative sulphuric anodising produces a silver, natural coloured finish.
After decorative sulphuric anodising a wide range of dyes can be used to give a very attractive finish. A full range of colours is available.
Hard anodising should be selected where aluminium components require increased surface hardness and wear resistance. It also provides very good corrosion resistance and a high degree of electrical insulation.
Often referred to by the trade name Alocrom,
Chromic Anodising provides a good level of
corrosion resistance combined with low electrical
resistance. The chromic acid film is relatively thin
and provides an excellent undercoat for paints
Polyester and Epoxy coatings feature hard, abrasion-resistant properties to provide an attractive finish. An Epoxy and Polyester combination (Hybrid) provides an optimum combination of decorative and protective qualities. A variety of colours are available with RAL, B.S. or colour matched. Care is taken to provide the best powder coated finish possible utilising the latest high quality lead free and TGIC free powders.
There are several types of polishing and metal finishing techniques that can be applied prior to further treatment. Examples of these include: polishing for a mirror-like finish, mechanical brushing for picture frames etc. and bead blasting for a more worn look.
Cutting - Deburring