Anodising

Anodising processes produce a stable oxide layer on the surface of suitable materials, such as aluminium and in some variations of the process, magnesium and titanium.

The process involves submerging a component in solution, whilst applying a voltage across the component and the solution.

Oxide layers of varying thicknesses can be produced. In cases where the layer is thick enough, it is possible to dye the porous oxide layer, providing the recognisable coloured anodised finish.

In the case of titanium anodising, the colouring is actually generated by light refraction through the oxide layer. Colouring of titanium is therefore controlled by the oxide layer thickness.

The types of anodising processes include:
• Chromic Anodising
• Sulphuric Acid Anodising
• Hard Anodising