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Fundamentals of Brazing Flux

Brazing flux is the solvent used during brazing processes. When used in association with brazing filler metals, brazing flux facilitates a smooth brazing process and ensures high joint quality. Functions of brazing flux include: removal of oxides on the surface of molten solder and base metals, protection of filler metals and base metals from oxidation during brazing, enhancement of interface activity, and improvement of liquid solder wettability on the base metals.