Chromising is a surface treatment carried out at elevated temperatures in which an alloy is formed by the inward diffusion of chromium into the base metal. Diffusion Alloys was the first company world-wide to launch (in the 1950s) chromising as a commercial industrial diffusion coating process.
Chromizing is a substitutional diffusion coating process for steel for protection against high temperature oxidation and hot corrosion and is carried out at about 950℃. Broad range of industries, including Oil & Gas, Process, Steel, Textile industrial sector have adapted to this process.
Steels with carbon content greater than surface carbon or 0.3% carbon containing steel and carburised steel can form a hard-dense chromium carbide diffused layer which has high hardness and excellent wear resistance.
Materials that are suitable for chromising:
Low carbon steels, Medium carbon steels, High carbon steel, Stainless steels, Nickel & Cobalt base super alloys.
The chromised material exhibits excellent Erosion and Oxidation resistance up to 650℃