Welcome to Diffusion Alloys

We have been supplying diffusion coating services for over sixty years. In 1955, Diffusion Alloys was the first company in the world to launch chromising as a commercial industrial diffusion coating process. Our vision is be the leading provider of coating technologies for clean and renewable technologies.

Our mission is to offer global capacity of highly effective, low carbon-impact coatings for clean and renewable industries.

With over 60 years of embedded knowledge we develop and apply highly effective diffusion coatings that protect against metal degradation to extend the life of our customer’s products.

We develop our coatings and processes to meet the needs of a greener future. Our staff are inquisitive, develop, test, and improve. Together we drive our business forward to meet the global challenges ahead. We offer a range of diffusion coatings to protect against metal and systems degradation caused by high temperature corrosion, chromium poisoning, metal dusting, sulfidation, oxidation, hydrogen permeation, wear and abrasion. We design our diffusion coatings to produce the best protection possible and can tackle complex, intricate and large scale components.

For more information on our capabilities, please browse through our Technologies, download our Case Studies and Factsheets or Contact us directly.

Diffusion Alloys is part of Time To ACT. Time To ACT supports the global transition to Net Zero through the development and commercialisation of world-beating clean technologies.

We are at the forefront of applications for clean energy and the hydrogen industry.

Large-scale hydrogen generation

Hydrogen electrolysers (SOE)

Fuel cells (SOFC)

Energy storage


Other specialist life extension

With over 60 years of industry experience, we’re a global specialist in the application of a range of protective coatings against metal degradation.

We have been supplying diffusion coating services for over 60 years. In 1955 the Company became the first company world-wide to launch chromising as a commercial industrial diffusion coating.


We have decades of experience in coatings for the industrial gas turbine market and the oil, gas and process industries and have developed a leading position in diffusion coating for clean technology applications.


We consider the Health & Safety of its employees, customers, visitors and the general public to be of prime importance. We take an ethical approach to our environmental responsibility & waste management.


We pride ourselves on consistently scoring as best coating supplier for quality with a number of our major and long term customers which is testimony to our quality management system.