Benefits of Anodising Aluminium
Anodising is widely used as a surface treatment on aluminium and has many benefits:
- Provides an abrasion resistant surface
- Creates a surface that is decorative (colour and sheen)
- Product is smoother and more pleasant to touch
- Gives surfaces an electrically insulated coating
- Creates a dirt-repellent surface (excellent for hygiene standards)
- Preserves the appearance of the part which prolongs the aesthetic life of the finish
- Improves corrosion resistance
Natural anodising means no colour is required and is the most widely used, it just gives a smooth transparent coating. However anodising aluminium can be completed in a very wide range of colours including brass, gold, red, violet, green, blue and orange.
Many of the parts we supply to our customers are anodised black or silver, these being housing for electronics, from small parts for port light windows on yachts to parts used in bar coding machines.
The Process of Anodising Aluminium
The process of anodising aluminium consists of a number of treatment baths, preparation, anodising, colouring (where applicable) and sealing. This type of anodising adds a film thickness of between 5 and 25 microns.
Hard anodising is defined as producing an oxide layer that is thicker than 25 microns and having a greater hardness. It is generally carried out in the same way as regular anodising, with sulphuric acid, but at a lower temperature.
The purpose of hard anodising is to create a thicker wear surface, improve corrosion resistance, improve electrical resistance and create a more wear-resistance surface.
Anodised aluminium is considered a high performance metal, it requires minimal maintenance and if well preserved the finish does not chip or peel. By simply rinsing the anodised surface the item will look as good as new.See Powder Coated Aluminium