The two options regarding surface treatment are powder coating and anodising. During anodizing a protective layer is built up from the aluminium itself. Via electrolysis, the natural aging process of aluminium is accelerated in a controlled manner. The most popular form of anodizing is natural or blank anodizing.
Another option is anodizing. Not just plain, natural anodized. Anodising can be done natural and in different colours.
Anodising is the electrolytic process of increasing the thickness of the natural oxide layer as mentioned above. Anodising is a controlled process where an oxide layer is added to the surface of the aluminium to improve its resistance to wear and corrosion. This oxide layer has typically a thickness of 5 to 30 µm.
The most poluar type of anodising is natural anodising. When protecting against wear and corrosion is the main motivation for treating the surface, then natural anodising an obvious choice. It is an economical option, and popular for projects not visually accessible and industrial applications where appearance is less relevant.
Anodising in colour is also an option. Available colours are silver, gold, bronze, copper, grey, black, blue, red, green. The anodising layer is transparent, meaning the colour, gloss and structure of the end product depend on the material and its pre-treatment. Popular pre-treatments are grinding, brushing, and polishing.