Salt bath for the currentless production of wear resistant borid

Details Salt bath for the currentless production of wear resistant borid Salt bath for the currentless production of wear resistant borid

1984-07-12

1985-08-20

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 155, C23C 940

Patent

active

045362246

ABSTRACT:
There is described a salt bath based on an alkali and/or alkaline earth metal halide with which there can be produced without the use of current adherent and wear resistant boride coatings on metallic workpieces. This bath contains gaseous boron monofluoride or a compound from which there is formed intermediately boron monofluoride. Advantageous there is used a salt bath containing 30-60% BaCl.sub.2, 10-25% NaCl, 1-20% boron oxide or borate, 10-30% NaF, and 1-15% B.sub.4 C.

REFERENCES:
patent: 3634145 (1972-01-01), Homan
patent: 3936327 (1976-02-01), Fichtl
Thin Solid Films, 78, (1981), pp. 67-76.

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