Salt bath for the currentless production of wear resistant boride layers
AssigneeDegussa AG
InventorsHans-Hermann Beyer, Ulrich Baudis, Peter Biberbach, Wolfgang Weber
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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.
Claims17
A salt bath containing alkali metal halide, alkaline earth metal halide or a mixture of alkali metal and alkaline earth metal halide and suitable for the currentless production of a wear resistant boride coating of Fe.sub.2 B on metallic workpieces, said bath also containing boron monofluoride in a gaseous state or a compound which under the conditions of the operation of the bath forms boron monofluoride intermediately by a reaction of (BOF).sub.3 with a boriding agent.
Dependencies are inferred from the claim text.