Method for cleaning metal parts

Details Method for cleaning metal parts Method for cleaning metal parts

1980-02-06

1982-05-04

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 19, 134 31, 134 37, 228206, B08B 500

Patent

active

043280447

ABSTRACT:
A method for relatively low temperature cleaning of metal parts, particularly stainless steels, superalloys, solid solution superalloys and gamma prime hardened nickel alloy parts, in order to render them brazable or otherwise bondable. The method makes use of a C--O--H--F atmosphere as the primary cleaning material. The preferred source of the C--O--H--F atmosphere is by thermal decomposition of a fluorocarbon resin and addition of a low moisture containing hydrogen gas.

REFERENCES:
patent: 2571328 (1951-10-01), Baker
patent: 2585819 (1952-02-01), Moore et al.
patent: 2851387 (1958-09-01), Low
patent: 4188237 (1980-02-01), Chasteen
"Brazing Stainless Steel in a Stable Reducing Atmosphere of Fluoride", AWS Conference (Philadelphia, Pa.-Apr. 1977).
Watson et al., Bureau of Mines, "Decomposition Temperatures of . . . as indicated by Halogen Liberation", Dec. 1950.

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