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US 6,913,788 B2Granted
Process and apparatus for chroming an inner surface of a component
AssigneeMTU Aero Engines AG
InventorHeinrich Walter
Life of this patent
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Abstract
A process for chroming 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, includes: providing a mixture of chromium granules and an activator; heating the mixture to a temperature at which a coating gas which substantially comprises gaseous CrCl is formed; dissipating the coating gas; and exposing the inner surface of the component to the coating gas thereby forming a chromium-containing diffusion layer.
Claims8
A process for chroming an inner surface of a component, comprising:
- providing a mixture of chromium granules and an activator;
- heating the mixture to a temperature to form a substantially gaseous product which is a coating gas comprising CrCl;
- dissipating the coating gas;
- and
- exposing the inner surface of the component to the coating gas, thereby forming a chromium-containing diffusion layer, wherein the dissipating of the coating gas and the exposing of the inner surface of the component occur automatically by the force of gravity.
2 more elements
Dependencies are inferred from the claim text.