Anticorrosive flux

US9056363B2 · kind B2 · utility

Assignee

• SOLVAY FLUOR GMBH · DE

Inventors

• Andreas Becker · Celle, DE
• Thomas Born · Holle, DE
• Placido Garcia-Juan · Hannover, DE
• Alfred Ottmann · Hannöver, DE
• Hans-Walter Swidersky · Hannover, DE

Key dates

• Filing date: Nov 20, 2009
• Grant date: Jun 16, 2015
• Expiry date: Mar 1, 2031

Classification

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

Abstract

Aluminum parts, such as heat exchangers, with improved resistance towards corrosion caused by contact with stationary water or aqueous compositions can be obtained by addition of Li compounds to the flux used for brazing such parts. LiF and especially Li fluoroaluminates are very suitable. Another aspect of the invention concerns fluxes containing Li salts and their use for brazing of aluminum parts.