Specialised Fe3O4 conversion coating meeting military standards.
Blackening of chromium-nickel steel is a high-temperature chemical process that creates a durable black Fe3O4 conversion coating on the surface of high-alloy steel or low-carbon steel. This layer penetrates the steel, becoming an integral part of it, which significantly increases the corrosion resistance and durability of the components.
The blackening process is carried out on an automatic line using the drum-and-hanger method, which enables effective and repeatable processing of various parts. Blackening meets the requirements of military standard MIL-DTL-13924D, Class 4, guaranteeing high coating quality. The Fe3O4 layer is very thin (approximately 5-10 millionths of an inch) and does not affect the dimensions of the processed elements or the hardness of the steel after heat treatment.
The process significantly improves corrosion resistance and extends the service life of parts, while surface finishing by oiling further enhances protective and lubricating properties, which is crucial for moving parts. In addition, the coating provides an aesthetic, deep black finish that is valued in many applications.
The process is carried out on a modern, automated drum and hanger line, enabling comprehensive and effective processing of components of various sizes and shapes. This allows us to meet the production requirements of customers from various industries, prioritising quality and repeatability.
Galwano-Perfekt is expanding its aluminium anodising range with two groundbreaking composite anode technologies: polymeroxid® LF4 LF4 and polymeroxid® xH4® xH4. This is a new standard in durability and protection.
At Galwano-Perfekt, we have been providing chrome-nickel steel blackening services since 2013 on a modern, fully automated production line. We guarantee high quality and excellent aesthetic results even for the most demanding applications.
The new Galwano-Perfekt branch, specialising in anodising, has obtained IATF 16949 certification. This confirms the highest quality of our processes and opens up new opportunities for cooperation with the automotive industry.