Thermal Diffusion Coating
Thermal diffusion coating is a process which produces a sacrificial a zinc/iron alloy layer providing long term, uniform and resilient anti-corrosion protection.
The process involves placing the pre-cleaned components into a container, along with a distribution media and a calculated mass of processing chemical.
The container is sealed and placed into a furnace which is raised to a temp of between 380˚C and 425˚C at which temperature thermal diffusion of the zinc will take place, allowing it to form an alloy with the substrate. At the same time, the container is slowly rotated for a pre-determined length of time.
The resultant coating is matt grey in appearance and uniform in thickness, the normal range being between 25 to 50 µm dependent upon specification which follows the contours of the component. This coating system can achieve in excess of 2000 hours salt spray performance.
Developments of the last 10 to 15 years, particularly regarding the zinc powders and furnace technology, have led to greater controls of both coating uniformity and the availability of thinner coatings now suitable for fasteners in the automotive sector.
Anochrome Group have a new innovative thermal diffusion coating plant incorporating the very latest technology for the coating of fasteners and assemblies. The process can be used for various steels, alloys, ferrous-based materials, grey iron & cast iron.
Anochrome can offer various version of thermal diffusion depending upon the application.
Please see our page on Greenkote thermal diffusion coating for more information.
We understand that a tailored approach to thermal diffusion coating is essential to your business. You can email us via the Contact page to discuss your individual requirements with an expert. We are also happy to provide you with further information on thermal diffusion coating by email, or alternatively you can call us on 01902 397333.