Anodising is the name for the treatment of aluminium to produce natural oxide coatings for protection, identification, wear resistance and decoration.
Aluminium components are anodised by placing them in a solution; a voltage is applied causing an oxide film to be produced at a controlled rate to a desired thickness. This anodic film is not a surface coating, but is part of the material.
Standard Sulphuric Anodising provides a silver coloured finish showing the natural colour of the metal but components can also be dyed in a range of colours to provide eye-catching effects.
Our own standard colours and tank sizes are below:
Red (1200 x 600mm), Blue (1200 x 600mm), Black (1200 x 600mm), Gold (1200 x 600mm), Grey (1200 x 600mm), Green (1200 x 600mm), Violet (600 x 600mm), Orange (600 x 600mm) & Bronze (600 x 600mm).
Sulphuric Acid Anodising
The most common form of anodising is sulphuric acid anodising.
An anodic film thickness of up to 30microns can be produced, depending on the grade of alloy and end use of the components. The lower range of thickness is ideal for decorative finishes, and the medium range is ideal for dyeing.
Anodic films with a thickness above 15microns are used for increased durability and external applications, where corrosion resistance and wear are the main criteria.
Etching, and or polishing prior to anodising may be carried out to enhance the component's appearance.The oxide film produced provides the surface of the aluminium with an extremely hard, durable, corrosion resistant and long lasting finish.
Sulphuric Acid Anodising provides a cost-effective way to enhance the performance and appearance of Aluminium.
Before you begin the manufacturing process of your aluminium components you might like to consider the grades of material available. We would be able to offer some advice regarding the material choice, its use and suitability for the type of finish you might require.
Masking of parts can be carried out using various methods to eliminate the anodic film from specific areas for reasons such as earthing etc. The part on the left is anodised, the part on the right
is Alocromed inside and anodised black on the outside.
Please enquire for more details.