Patent · US Expired

Salt bath for the currentless production of wear resistant boride layers

US4536224A · kind A · utility

5Cited by

2References

17Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Hans-Hermann Beyer · Munich, DE
Ulrich Baudis · Hanau, DE
Peter Biberbach · Rodenbach, DE
Wolfgang Weber · Hemau, DE

Key dates

Filing date	Jul 12, 1984
Grant date	Aug 20, 1985
Priority date	—
Expiry date	Jul 12, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C8/40
WIPO fieldSurface technology, coating
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.