Process and apparatus for chromizing an inner surface of a...

Details Process and apparatus for chromizing an inner surface of a... Process and apparatus for chromizing an inner surface of a...

C - Chemistry, Metallurgy

23

C

C23C 10/32 (2006.01) C23C 10/10 (2006.01) C23C 10/12 (2006.01)

Patent

CA 2353373

A process and an apparatus for chromizing an inner surface of a component, in which the inner surface which is to be coated is not brought into contact with a powder which forms the coating gas, comprising the following steps: providing a mixture (4) of chromium granules and an activator, heating the mixture (4) to a temperature at which a coating gas which substantially comprises gaseous CrCl is formed, dissipating the coating gas and exposing the inner surface (3) of the component (1) to the coating gas so as to form a chromium-containing diffusion layer (Fig. 1).

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