Hot argon cleaning and protective coating of components made of

Details Hot argon cleaning and protective coating of components made of Hot argon cleaning and protective coating of components made of

1992-12-28

1994-11-22

Dean, Richard O.

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148237, 148709, 148281, C23C 2200

Patent

active

053665635

ABSTRACT:
The surfaces of a metal or alloy component are scrubbed by a high-velocity stream of inert gas at temperatures which facilitate removal of contaminants. Simultaneous with scrubbing, the impurities are captured in a separated loop of one or more "getter" filters operating at optimized temperatures. The scrubbing and "getting" functions are followed by a rapid elevation of the temperature of the component by heating the inert gas, now essentially free of contaminants which would otherwise react with the component surface at the elevated temperatures. Thereafter, a specific protective layer-forming agent is introduced into the inert gas stream at an ideal temperature, which agent will react predictably with the component being treated to form a predetermined protective coating on its surface.

REFERENCES:
patent: 3111434 (1963-11-01), Takao
patent: 3593495 (1971-07-01), Ellison
patent: 3601900 (1971-08-01), Erisman
patent: 3899392 (1975-08-01), Grossman et al.
patent: 4191598 (1980-03-01), Conybear et al.
patent: 4200460 (1980-04-01), Grossman et al.
patent: 4312669 (1982-01-01), Boffito et al.
patent: 4989433 (1991-02-01), Harmon et al.

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