Where is flux applied when silver brazing?

The appropriate application of flux during silver brazing is critical for ensuring a proper bond between the base metals. Flux is used to prevent oxidation and facilitate the flow of the brazing filler metal. When considering silver brazing, it is essential to apply the flux to the male part of the joint. This is because the male fitting typically has more surface area that can benefit from the protective qualities of the flux.

Applying flux on the male part also helps to promote better wetting of the brazing alloy, allowing it to flow effectively into the joint when heat is applied. The flux serves to clean the surfaces at the joint and, rather than just protecting the surface, it acts as an intermediary that aids in the complete heating and bonding process, creating a strong and durable joint.

Applying flux incorrectly, such as on the oxygen supply line or solely on the female fitting, may not yield the desired results for a successful brazed joint, as it would limit the effectiveness of the process by not ensuring the right surfaces are treated to support proper adhesion and flow of the brazing filler.