Alumite is a general term for anodizing aluminum. It is a process that uses electricity to form an aluminum oxide film on the surface of an aluminum material.
This aluminum oxide film is also called an alumite film and has the same properties as ceramics such as alumina, so it improves corrosion resistance and wear resistance. It is also possible to improve releasability and slipperiness by adsorbing PTFE (polytetrafluoroethylene) fine particles on the surface after alumite treatment.
We perform the treatment with sulfuric acid bath.
We also support hard anodic oxidation, which is usually superior in hardness and wear resistance to alumite coating.
Basic characteristics
| Wear resistance | Heat resistance | Corrosion resistance | Chemical resistance | Decorativeness | Non-adhesive | Lubricity | Adhesion | Electrical conductivity | Dimensional accuracy |
| ◎ | 〇 | 〇 | ◎ | ◎ | ◎ | ◎ | ◎ | × | 〇 |
Features
Features 1Hard alumite is also available.
This alumite film is an oxide of aluminum and has the same elemental composition as ceramics.
Therefore, the surface of aluminum can be hardened, and wear resistance and corrosion resistance can be improved.
By lowering the treatment temperature of alumite, it is possible to make hard alumite that further improves the hardness of the film.
The hardness of alumite film is estimated to be about Hv200, and the hardness of hard alumite to be about Hv400.
Improving corrosion resistance by making it crackless
Having similar properties as ceramics, the alumite film has good corrosion resistance.
However, there are cases where the aluminum material is corroded by the formation of cracks in the coating. By changing the alumite liquid and treatment conditions, it is possible to create a film that does not easily crack.
Color alumite / functional alumite
The alumite film has a structural arrangement of hexagonal columns with small holes in their centers.
There are also treatments that use these holes to color the film by impregnating it with dyes, etc., and to attach PTFE particles (Teflon) to improve wear resistance and slipperiness.
Plating equipment
| Processing type | Maximum size | Maximum weight |
|---|---|---|
| Rack | 500 × 500 × 500H | 15kg |
Proceccable materials
Various aluminum materials (appearance may change depending on series)
Application
Equipment machine parts, structural parts, automobile parts, housing equipment such as aluminum sashes, etc.