However, many alloys often show an uneven appearance (discoloration) after anodizing, which is not desired. Optical anodizing is also not feasible, for example, with the low-cost die casting process, which means that certain combinations of aluminium components are excluded from the outset. This is why many industries are looking for optically high-quality alternatives. This alternative should be applicable to as many alloys and manufacturing processes as possible (such as continuous casting, die casting, forged parts, etc.) without any optical difference being detected.
With its Saphiral® coating system, EPG AG has a solution for almost all applications. For the aviation industry, for example, EPG AG has developed a colored sol-gel coating that reliably provides a uniform surface appearance and is also resistant to scratches and chemical influences. The color of the coating can also be adapted to customer requirements.