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Service products / Surface treatments / Anodizing / Semi-hard anodizing

Learn more about Semi-hard anodizing

Seeds hard anodizing is an effective treatment used when there are special requirements for the aluminum's corrosion resistance.

Further information

Semi-hard anodizing is a treatment that takes some of the best properties from two different worlds. With semi-hard anodizing, a durable product is obtained that is comparable to hard anodizing, but which at the same time has the flexibility of normal anodizing.

Semi hard anodizing is an effective surface treatment of aluminum profiles and is used, among other things, to create results such as increased corrosion resistance, a dirt-repellent surface, a decorative surface or a surface with an electrically insulating coating. 

Semi-hard anodizing is a sought-after treatment type due to its high hardness, wear resistance and superb corrosion resistance, while still being offered in a wide range of colours.

Semi-hard anodizing manages to be an absolutely fantastic link between the decorative and the technical and is therefore an excellent choice when the product has both high technical requirements, but also needs to appear as a delicious product with specific visual requirements.

With semi-hard anodizing, aluminum is treated in one of our special process vessels according to very specific parameters with the aim of building an oxide layer that hits the midpoint between the hard and the decorative.
Aluminum blanks, which are treated with a semi-hard anodizing, will be able to tolerate being exposed to wear and tear to a greater extent, but where you still have the option of coloring in other colors than grey, brown and black. 

Technical specification

Process Standard Type Class
Hard anodizing HAI® 6000 MIL-PRF-8625
ISO 7599
Type II Class 1 and 2
Class AA5-25
Type 6000, µm 30 -75 is the treatment to choose if you want to color your items, but only an organic color, as hard anodizing gives a greyish look. Type 6000 is extra good for hard anodizing 6000 alloy, but can also be used for other alloys. This process does not require us to know surface area. Type 6000 treatment is only offered by HAI.

HAI® type 6000

Type 2000, µm 30-100 is the treatment to choose if you want Mill III standards to be met.

There are high requirements for this treatment, and we therefore need to know the full surface of the subject precisely in order to fulfill the process. Type 2000 can be used for all alloys, and is particularly good for copper alloys, as this treatment dissolves copper faster. As it is a process that takes time, it gives a rougher surface and it is not possible to dye in colors other than black.

HAI® type 2000

Type 7000, µm 30-200 can anodize all alloys and gives a smoother look. Type 7000 is therefore recommended for more architectural subjects. This treatment is also good for offshore, as it can create a thick µm layer. A special ability of this treatment is that you get a hard surface. that do not require sealing.

HAI® type 7000

Al99/99,5

AlMn1 – AlMn1Mg0,5/1 – AlMnCu

AlMg1 – AlMg2,5 – AlMg3 – AlMg5

AlMgSi0,5/ 0,7/ 1

AlMg2Mn0,3/0,8

AlZnMgCu0,5/1,5

Most suitable alloys

Our supplier
Read more

Clariant

In recent years, aluminum has become a widely used material in everyday life. Both for interior architecture and for more decorative purposes.

The colors go through a constant quality control, which ensures uniform coloring and high quality. However, we would like to point out that color differences may occur depending on whether it is a matter of coloring cast items, plates and profiles.
See our interior colors

Indoor coloring

Today, anodized aluminum is used more and more often for architectural purposes. Buildings are more often constructed in aluminium, which is perfect for this purpose. For example, the buildings' facades are naturally anodised or colored aluminium, as the metal is light, requires minimal maintenance and fits into most environments.
See our outdoor colors

Outdoor coloring

SEO texts

Blowing is an effective mechanical pre-treatment that is used when there are special requirements for the aluminum's structure or hardness. Blasting leaves a nice, uniform and matte surface at the same time, the treatment can to a certain extent remedy machining surfaces, grinding marks, tensile and heat streaks, which are visible on the raw material. This is due to changes in the material structure, which achieves the more uniform surface and with a matte appearance before further processing.​

HAI offers several different blowing media with different roughness in the structure to give the uniform surface a broken structure.

We have different variants of blowing agents, where depending on the desired result, you can choose between; glass beads, precious corundum, stainless steel balls, stainless steel grit and mixed blasting agent.

SEO texts

We have a blowing agent that suits your needs regardless of the application or the physical characteristics of the component.

The treatment takes place in a closed cabin, where our operators blow fine grains of glass against the aluminum blanks. This achieves a uniform surface and a nice finish on the entire item.​

Blowing is a pre-treatment process that can be equated with other mechanical pre-treatments such as grinding, brushing and polishing.​

​​HAI can blow glass profiles up to 8 meters in a continuous plant and offers economically advantageous glass blowing in fully automatic plants.

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