Technical Anodizing

Technical anodising protects against corrosion and wear

Normal anodising, better known as technical anodising, is developed to improve aluminium and aluminium components both functionally and decoratively. This layer is formed by anodic oxidation in a cooled acid electrolyte of special composition. With the help of an electric direct current, the base material is transformed into an aluminium oxide layer on the surface.

The layer thickness to be achieved depends on the application, the desired layer properties and other parameters. For most applications layer thicknesses of 5 – 20 µm can be achieved. Only 1/3 of the oxide layer is built up, the rest penetrates the aluminium. This must be considered during the design phase.

Alloy determines the colour with technical anodising

Practically all technically interesting aluminium alloys for kneading, casting and spraying can be anodised. However, the alloy is a determining factor when it comes to the colour of the anodised part. An alloy from the 3000 series turns grey and a 7000 alloy turns gold. Available colours are clear and black. Other colours are available on request depending on the parameters. Our engineers at Mifa Surface Treatment will be happy to advise you about the colour for technical anodising and other aspects.

Layer properties

Max. layer thicknessup to 20 µm
Corrosion protection
“max. 2.000 hours salt spray test according to
DIN ESS 50021”
Hardnessabout 250 HV 0,25, depending on the alloy
General specificationMIL-A-8625F Type II

Contact us

If you want to know more about technical anodizing. Do not hesitate to contact us. We are pleased to help you.