What is Aluminium Anodizing Process?
Aluminum is a metal that oxidizes easily, even in not particularly aggressive environments. It therefore requires protection that inhibits its oxidation and corrosion. Anodization is the main protective treatment of aluminum which also gives it an excellent aesthetic appearance, thanks to the possibility of being colored using pigments that penetrate the layer.
Aluminium Anodizing Process forms a very hard and compact surface layer of aluminium oxide, which allows the surface characteristics of corrosion resistance, wear resistance, hardness and dielectric insulation to be increased.
The process most used industrially is that with sulfuric acid anodizing,
Two types of anodic oxidation in sulfuric acid can be identified which differ in their characteristics and production process:
- natural or decorative Aluminium Anodizing Process, with thicknesses between 5 µm and 20 µm, used to protect parts from corrosion in non-aggressive environments and increase resistance to scratches and wear. It lends itself to being easily coloured using pigments that penetrate the porosity of the covering.
- hard Aluminium Anodizing Process, with thicknesses between 30 µm and 50 µm, increases the characteristics of corrosion resistance, wear resistance, hardness and dielectric insulation.
The main national and international standards that regulate aluminium anodizing process and coatings are: ISO 7599, ISO 10074, UNI 10681, UNI 7796, MIL-A-8625, ISO 7583.
