Anodized aluminum

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The surface of aluminum can be both cured and protected against corrosion as well as colored by anodizing. A spectrum of colors and thickness of aluminum plates is thereby generated, which to a large extent covers the demand for front panels.

Properties of anodized surfaces

Anodic or "electrolytic" oxidation ("anodizing") of aluminum produces a dense and very hard oxide layer on its surface, which is firmly bonded to the source material. Such a technically generated anodic coating can be precisely controlled in thickness, hardness and appearance. It provides protection against mechanical influences and is weatherproof and corrosion resistant.

As the technically generated anodized layer is transparent, the metallic shine of the material – in contrast to aluminum with a naturally oxidized surface – comes into its own.

Using additional procedures the anodized layer can also be colored. This involves either dye molecules (adsorptive) or metallic salts (electrolytic) being absorbed into the network of pores produced by anodizing.

In order to finally seal the pores, the anodized and optionally dyed aluminum is immersed in a sealing bath. Optically transparent alumina hydrate is formed, which accumulates in the pores, thereby sealing them.

During anodization printing the dye is injected by an inkjet printhead directly into the pores of anodized aluminum before it is sealed.

Available colors

Please click on the pictures to enlarge them.

Available thicknesses

The following table shows which thicknesses of anodized aluminum panels of different colors are kept in stock (see "other designs" for thicknesses up to 40 mm). See the following section for enlarged views of the individual colors.

Aluminum color sample

Anodization color

Available panel thicknesses [mm]

1

1.5

2

2.5

3

4

5

6

8

10

12

15

Tolerance ± [mm]

0.1

0.1

0.1

0.1

0.1

0.1

0.25

0.3

0.4

0.4

0.4

0.4

Natural

 

 

 

 

 

 

 

 

 

 

 

 

Black

 

 

 

 

 

 

 

 

 

 

 

 

Blue

 

 

 

 

 

 

 

 

 

 

 

 

Gold

 

 

 

 

 

 

 

 

 

 

 

 

Bronze

 

 

 

 

 

 

 

 

 

 

 

 

Green

 

 

 

 

 

 

 

 

 

 

 

 

Red

 

 

 

 

 

 

 

 

 

 

 

 

In stock, front side (viewing side) is free from defects, back side may include processing and handling marks (e.g. roll marker, scratches) and a different thickness of oxide.

In stock, front side (viewing side) may show irregularities (e.g. small scratches or impact marks), back side may include processing and handling marks (roll marker, scratches) and a different thickness of oxide.

Procurement Article, front side (viewing side) may have irregularities (e.g. small scratches or small divots), back side may include processing and handling marks (roll marker, scratches) and a different thickness of oxide.

Cut surfaces which are created in the aluminum source material by the milling process are generally not subsequently finished, so they appear "bright". Please take note of our "Finishing options". With the "Powder coating"option this effect can be generally avoided.

Minimum and maximum processing areas

The strength and rigidity of the panel material along with the available processing areas of our machines limit the maximum dimensions for machinable main plate surfaces. The requirements of the clamping jigs etc. limit the minimum dimensions for machinable main plate surfaces:

Thickness

[mm]

Short side [mm]

Long side [mm]

minimum

maximum

minimum

maximum

1.0

10

100

10

250

1.5

130

350

2.0

285

1100

2.5

500

3.0

800

4.0

5.0

6.0

8.0

10.0

12.0

15.0

Minimum and maximum processing areas of anodized aluminum panels