Anodising is an electrolytic conversion coating that increases the hardness and corrosion resistance of raw aluminium. It is a process achieved by suspending the raw aluminium in a mixture of water and Sulphuric acid solution and passing a DC current through. This process increases the natural aluminium oxide layer on the surface of the metal.
Moss Metal Finishing offers two types of Anodising, standard Sulphuric Anodising which is the most suitable for decorative purposes as it can be dyed a range of colours with great effect. The other option is Hard Anodising which offers better corrosion resistance and is most suited for Defence and Marine applications. This process is less suitable for colours though as it gives a duller effect.
The process of anodising adds to the dimensions of the aluminium with standard anodising adding between 5-25µm and Hard Anodising adding between 25-80µm. The process grows the oxide layer onto the aluminium and it grows inwards as well as outwards therefore with a thickness of 10µm 50% would be inside the aluminium and 50% on the outside.