Caption of photo: Aluminium compressor wheels, electroless nickel plated according to the DURNI-COAT® process
DURNI-COAT® is a process for the functional coating of ferrous and non-ferrous materials (Electroless Nickel).
The DURNI-COAT® process consists in electroless deposition without any external source of electricity. In this process the workpiece is immersed into an aqueous process solution with a specific content of nickel ions. During the process these ions are reduced into metallic nickel. The chemical reacting agents and formulators of the electrons required in this process are the hypophosphite ions in the solution. These agents are transformed, by oxidation in the course of the reaction, into orthophosphite. A nickel-phosphorus alloy layer forms on the workpiece's surface. This layer effectively protects the workpiece against wear and corrosion.