Definition - What does Chromadizing mean?

Chromadizing is a type of surface treatment performed at extremely high temperatures, above 900°C. In this process, an alloy is created through chromium's inward diffusion into a base metal.

It is also a thermochemical technique that primarily involves saturating by diffusion of iron-rich alloys with an element called chromium. This is commonly carried out in order to extend the lifespan of tools and other industrial components.

Chromadizing is also known as chromizing.

Corrosionpedia explains Chromadizing

Chromadizing is a process that can provide protection to components, especially under engineering settings. It is broadly used on hot portions in gas turbines or blades used in various industries as well as in vanes so that they are protected from hot corrosion and temperature oxidation.

Furthermore, chromadizing is also used in industrial components like:

  • Levers
  • Sprags
  • Chain pins
  • Rods

Steels that contain carbon higher than 0.3% are capable of forming dense, hard and diffused surface layers of chromium carbide with high hardness levels and outstanding wear resistance.

Some of the common materials that are ideal for this process include:

  • Medium and high carbon steels
  • Cobalt base alloys
  • Nickel base alloys
  • Stainless steels
The chromadizing process is widely used in numerous industries because it can provide:
  • Resistance to oxidation at temperatures of 650°C and higher
  • Corrosion and wear resistance
  • Increased hardness and reduced flaking
  • Erosion resistance

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