BORINOX® is a gas-based low-pressure diffusion process for producing a highly wear-resistant surface (expanded austenite/ferrite) on the basis of stainless steel, nickel – and cobalt chromium alloys. A special process control effectively suppresses the precipitation of chromium carbides or nitrides, which would reduce the corrosion resistance. The peripheral layer is produced integrally in the material, forming a hardness gradient to the core. Compared to coatings, there is no risk of cracking or spalling of the functional layer.