Anti-seizing surface coating for assembly means for tubes by thr

Details Anti-seizing surface coating for assembly means for tubes by thr Anti-seizing surface coating for assembly means for tubes by thr

1992-02-20

1993-10-19

Silverberg, Sam

Pipe joints or couplings

With lubrication

285333, 285355, 148284, 148277, F16L 700

Patent

active

052539024

ABSTRACT:
The anti-seizing coating according to the invention relates to the protection of the surfaces of male (7) or female (2) components of an assembly means (1) for metal tubes by threadings coming into contact with one another at the time of screwing.
This coating is constituted by a thin lead oxide layer (14) produced by the oxidation of a lead layer, which is itself formed on an underlying layer (13) of a metal such as copper and which has been directly or indirectly deposited beforehand on the surface (4, 5, 9, 10, 11, 6) to be protected against seizing. The invention also relates to the process for producing this coating and the coated assembly means obtained.

REFERENCES:
patent: 4474651 (1984-10-01), Yauchi
patent: 4758025 (1988-07-01), Fricks

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