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.