Aluminium anodizing -electrolyte oxidation
Anodizing creates an insulating and corrosion-resistant oxide layer on the aluminium surface. The achievable layer thickness varies depending on the alloy: for copper-containing aluminum (copper content above 2 %) it is between 5 and 10 µm, for copper-free alloys up to 25 µm are possible. The process is used in numerous industrial sectors and is impressive due to its versatility - both technically and decoratively. Complex requirements and various visual effects, such as glossy, semi-gloss or matt surfaces, can be achieved through targeted mechanical pre-treatment or by covering certain surfaces and holes. The porous structure of the anodized layer offers a high adsorption capacity, allowing colors to be stored safely and permanently. During subsequent sealing, the pores are closed and the dyes are permanently incorporated into the coating.
Anodizing aluminium
Properties
Coating thicknesses of up to 25 µm are possible with copper-free aluminum. If the alloy contains more than 2 % copper (e.g. turning and milling grades), the coating thickness is reduced to 5-10 µm. Such coatings are softer and less resistant. Only one third of the layer is applied as a coating, two thirds penetrate into the base material - an important aspect for mating parts. In cooperation with our partners, we offer glass bead blasting, grinding and polishing as pre-treatment.
Protection & precision
Advantages
Anodizing improves the corrosion protection, appearance and hardness of the surface. Even complex requirements such as covering holes or threads can be implemented.
Important for fitting parts: Only one third of the layer is applied on the outside, two thirds diffuse into the base material - this should be taken into account when planning the dimensions.
Refinement
Summary
The anodizing process uses anodic oxidation to create a robust, oxidic protective layer on aluminium - for improved corrosion resistance and visual enhancement. We process workpieces up to 105 × 295 cm in a variety of colors: Natural, gray, black, red, gold, orange, brown and blue. The color tone, surface structure and feel can be individually adapted to your technical and design requirements.
Color Oxal
During color anodizing, the outer aluminium layer is opened and oxidized in an electrolytic bath. This creates a porous oxide layer that allows dyes to penetrate. The desired color is created by filling the dyes into these pores. Finally, the surface is sealed to fix the color and ensure the durability and protection of the layer.
Anodizing colors
Advantages
Color anodizing is a modern method of not only providing long-term protection for aluminium surfaces, but also giving them an individual color and improved technical properties.
In our systems, we process workpieces up to 105 × 295 cm in the colors natural, grey, black, red, gold, orange, brown and blue.
Ten additional colors are also available for workpieces up to 100 × 60 cm - for maximum design freedom.
FAQs
For which applications is anodizing particularly suitable?
Anodizing is versatile and is used in numerous industries in which high demands are placed on the quality of the anodizing process. Surface quality, functionality and durability be provided.
In the Architecture anodized aluminium is used for façades, window frames or sun protection systems, for example - where it impresses with its Weather-resistant surface and the large selection of color variants.
In the Mechanical engineering and the Automotive industry the process serves to protect against corrosion and wear on technical components that are permanently exposed to stress. The matt, uniform appearance is also used in the Design area This is appreciated for high-quality consumer goods, furniture and electronic housings, for example.
Also in the Medical technology or Food industry anodized aluminium parts are used, as the surfaces are hygienic, easy to clean and resistant to many chemicals. Last but not least, the Aerospace industry from the low weight and high durability of anodized components.
In short: Anodizing is the ideal solution wherever Technical performance, surface protection and high-quality appearance are in demand.
What are the advantages of anodizing?
Anodizing aluminium offers a whole range of advantages - both functional and visual. The resulting Oxide layer is hard, uniform and firmly bonded to the base materialwhich makes them particularly resistant to Corrosion, scratches and mechanical stress makes.
In addition, the layer light and UV resistantThis enables a lasting brilliance of color on colored surfaces - in contrast to paintwork, which can fade over time. The porous structure of the anodized layer absorbs dyes well, allowing a wide range of colors to be applied. Decorative design options are created.
Anodized surfaces are also Easy to clean, hygienic and Temperature resistant. They are therefore also suitable for the Use in the food industry or medical technologyas no harmful substances are released and the coating remains chemically stable.
Another advantage: the anodized layer does not change the dimensions of the workpiecebecause it grows evenly into the surface and does not apply like a coating.
What is the difference between chromating and anodizing?
Chromating creates a very thin, conductive protective layer, while anodizing creates a thicker, non-conductive oxide layer. Chromating is particularly suitable when good electrical conductivity or paint pre-treatment is required. Anodizing offers particularly high corrosion protection and a wide range of colour options.