Anodizing aluminium profiles means growing a protective oxide layer. The anodizing process steps are as follows: profiles are placed in an immersion bath containing sulphuric or chromic acid, which in turn leads to advantages like an improved protection of the metal. The metal serves as an anode, which is why we call this surface treatment anodizing.
Layer thicknesses from 5 to 20 µm can be achieved depending on the application of the profile, the desired layer properties, and other parameters. Only 1/3 of the oxide layer is built up; the rest penetrates the aluminium during anodizing. It is important to carefully consider this during the design phase.
Surface treatment to improve products
Surface treatments improve your magnesium or aluminium components. Corrosion cannot take place, and wear resistance increases while friction decreases. When aluminium profiles are visible, an attractive surface is essential. Coatings can also provide this. All profiles or products benefit from an optimal surface treatment. Mifa can perform many different surface treatments. And if necessary, we can develop a tailor-made coating.
Types of anodizing
At Mifa, we have three methods to anodizing aluminium profiles:
- Sulphuric acid anodizing.
- Hard anodizing of aluminium profiles.
- Chromic acid anodizing.
Almost all aluminium alloys can be anodized. The alloy is a determining factor for the colour of the anodized part. An alloy of the 3000 series turns grey, and a 7000 alloy turns gold. At Mifa however, we can supply the protective oxide layer in different colours. Black or orange are included in our package as standard. Other colours are always possible on request.
Hard anodizing aluminium profiles
There are two main benefits when it comes to hard anodizing profiles:
- Increased hardness
- Wear resistance
In order to realise this, Mifa created HART-COAT®, a coating specifically made for improving the aluminium materials. The use of this type of anodizing creates an oxidation of the surface, which leads to a ceramic-like layer. The properties of the HART-COAT® layer can be adapted to the type of material being treated by means of variable process parameters according to the specific requirements. Don't hesitate to contact us for more details on hard anodizing.
Another example of our anodizing aluminium processes, is by using technical anodizing. The main advantages are:
- Protection against corrosion
- Protection against wear
This way of anodzing is also known as normal anodizing. Next to the mentioned advantages, the coating is also used to improve aluminum parts in a more decorative way. The coating is performed in an acid electrolyte at temperatures slightly below room temperature. Make sure to contact us for more details on technical anodizing.
Anodizing layer properties
MAX. LAYER THICKNESS
|up to 20 µm|
Max. 2,000-hour salt spray test – in conformance with DIN 50021 ESS
approx. 250 HV 0.025 depending on the alloy
MIL-A-8625F Type II
Would you like to know more about anodizing aluminium profiles?
If you would like more information about anodizing aluminium profiles, we would be happy to tell you more. Please fill in the contact form here, and our experts in aluminium anodizing will contact you within one working day. If you would like to immediately contact us, please call our employees during office hours on the following number: +31 (0)77-389 88 88