In Welding Flux Is Used To. Flux is used to protect the weld from the atmosphere. Flux core is most commonly used to weld mild steel and low alloy steel.
To be noted it is a sort of arc welding process that can be both automated or semi-automated. As another example AWS D15 a common bridge fabrication document limits use of active fluxes to one- and two-pass. Use the pliers to clamp the edges of your weld.
The coating on the outside of a steel electrode or rod is known as flux.
With welding rods and wire electrodes the flux is applied in the factory. This slag is usually left by flux. It helps to clean the metals surfaces. The flux then forms a protective layer over the weld called slag.