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LASOX-COAT®

LASOX-COAT®

Partial oxidation of aluminium surfaces without the use of chemicals

What does light mean to us?

What does light mean to us?

Light - sunlight - laser light. Sunlight creates life. Why not create new coatings with laser light?

The process

LASOX-COAT® is a selective oxidation of aluminium surfaces using a laser. In an oxygen atmosphere, a laser beam is directed onto the surface of the workpiece to be treated. Under the influence of the laser, alloy particles begin to melt and vaporise. The oxygen plasma, which consists of ionised atoms, and part of the molten aluminium react to form aluminium oxide (corundum, Al2O3), which now covers the treated surface. Below the corundum layer, the remelt zone is about 10 times thicker.

The laser beam traverses the surface of the component, back and forth, like a farmer ploughing his field. The coating time is therefore proportional to the coating area, or in other words: the smaller the area, the faster the processing. The selective coating process can be used to create labels, individual lines or complex shapes as well as patterns.

The LASOX-COAT® plant is enclosed and designated as laser class 4 under the EN 60825-1 standard. The big advantage over galvanic processes is the absence of process chemicals such as electrolyte acids. Therefore, the approval of a LASOX-COAT® plant poses no problems. This is particularly interesting with regard to the integration of a LASOX-COAT® plant into an existing production line.

  • Characteristics

    The spacing of the tracks produced by the laser beam, as one can easily imagine, affects the degree of coverage and the roughness of the treated surface. The roughness is more than twice as high with cross web direction as in web direction.

    The hardness of the aluminium oxide is very high because the process does not form micropores in the aluminium oxide layer. The hardness of the remelting zone depends on the alloy used.

    LASOX-COAT® coatings considerably increase the wear protection of the component surfaces. To increase wear protection, a surface does not always have to be completely coated; even a "cross-hatch" pattern makes a surface more wear-resistant.

  • Base Materials

    Basically, almost all aluminium alloys can be coated with LASOX-COAT®. However, in individual cases, it is, advisable to clarify which surface properties should be prioritised and which alloy is suitable for theLASOX-COAT® process in that case.

  • Field of Application

    LASOX-COAT® is mostly used for partial wear protection of aluminium components, but can also be used to reduce corrosion on a workpiece. Flat surfaces are preferable, but rounded surfaces are also coatable. Small coating surface areas of a large component are ideal because then the locally generated heat can dissipate well.

    A typical application example for a coating with a LASOX-COAT® layer is a part of a component surface which is subject to repeated wear. This can be a housing edge on which a flap strikes when opening and closing or a pump impeller that partially wears. Laser markings and laser writing of aluminium components for the purpose of traceability and documentation are also conceivable.

    Further application examples include pneumatic valves, proportional valves, brake pistons, hydraulic and pneumatic slide valves.

Product enquiry

If you would like to tell us something about the product presented here, you are welcome to do so. Your enquiry, your comment, your wishes will be forwarded directly to your personal contact person.

More Surface Treatments

  • HART-COAT®

    HART-COAT®

    Hard anodisation, hard coating

    to the process
    HART-COAT®
  • SELGA-COAT®

    SELGA-COAT®

    Selective galvanic finishing of metal surfaces

    to the process
    SELGA-COAT®
  • TUFRAM®

    TUFRAM®

    Hard anodising with fluoropolymers

    to the process
    TUFRAM®
  • Technical anodising

    Technical anodising

    Optimisation of aluminium surfaces - functional and decorative

    to the process
    Technical anodising

Do you have a question about materials or processes?
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Aalberts Industries
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