Process for preparing flux suitable for soldering light metals such as aluminum

US6221129A · kind A · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Heinz-Joachim Belt · Burgwedel, DE
• Alfred Borinski · Sehnde, DE
• Ruediger Sander · Sehnde, DE
• Werner Rudolph · Hannover, DE

Key dates

• Filing date: Apr 25, 2000
• Grant date: Apr 24, 2001
• Expiry date: Apr 25, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2103/10
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A flux which contains irreversibly dehydrated K.sub.2 AlF.sub.5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and exhibiting outstanding flow of the solder. An appropriate soldering process, an aqueous flux suspension and preparation processes for the flux are also disclosed.