What functions does flux serve during soldering processes?

In soldering processes, flux plays a crucial role in preventing the formation of oxides on the surfaces being joined. When metals are heated, they can easily oxidize, leading to the formation of an insulating layer that can disrupt the flow of solder and inhibit a proper bond. Flux helps to remove existing oxides from the metal surfaces and minimizes the chance of new oxide formation. This ensures that the solder can make good contact with the metal, resulting in a strong and reliable joint.

While flux does provide some protective benefits and can promote better joint quality, its primary function in soldering is focused on the prevention of oxide formation. This is essential for creating effective electrical and mechanical connections, particularly in HVAC applications where reliability is crucial.