Patent · US Expired

Fluxing agents

US6432221B1 · kind B1 · utility

26Cited by

5References

23Claims

0Family size

Assignee

SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

Ulrich Seseke-Koyro · Vellmar, DE
Joachim Frehse · Hannover, DE
Andreas Becker · Celle, DE

Key dates

Filing date	Nov 15, 2000
Grant date	Aug 13, 2002
Priority date	—
Expiry date	Nov 15, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K35/3605
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

Components made of aluminum and aluminum alloys can be brazed at temperatures of up to 600° C. using a fluxing agent composed of alkali fluorozincate or alkali fluoride/zinc fluoride mixtures. Other fluxing agents, for example those composed of potassium fluoroaluminate can be used in addition. Alkali fluorozincate fluxing agents, especially potassium and cesium fluorozincate fluxing agents, act not only as a fluxing agent but also improve the surface quality since zinc and alkali fluoroaluminates are deposited on the surface of the components. The invention also relates to new fluxing agents containing alkali metal fluorozincates.

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