Question

When should flux be used?

1) Only when brazing
2) Only when soldering
3) Only when welding
4) Both when brazing and soldering

Answer 1

Flux is crucial in both brazing and soldering for preventing and removing oxides and ensuring a clean, strong joint.

Step-by-step explanation:

Flux is used in both brazing and soldering processes. When these processes are performed, flux serves several purposes. It helps prevent the formation of oxides on the metal surfaces that are being joined, which can inhibit a good bond. Additionally, flux helps to remove any existing oxides from these surfaces. The function and application of flux are vital for ensuring a clean, strong joint when either brazing or soldering metal pieces.