Quality products for black colouring a wide range of metals

The black colouring process is often used to create an anti-corrosion layer and a black colour on metallic surfaces. This process involves dipping the workpieces into a solution, which creates black mixed oxide layers that protect the surface from corrosion. Emil Otto’s outstanding black oxidation solutions are designed for processing stainless steel, heavy metals, structural and tool steels as well as nonferrous metals, aluminium and aluminium alloys. These solutions are ready for immediate use and offer an effective option for surface treatment in metal processing. The layers created by burnishing are resistant to bending and abrasion, which enables the metal to be processed further without any problems. In addition, black oxidised surfaces act as a primer for other surface coatings such as paints.