Arc welding is another term for stick welding.
This process entails using an electric arc to create the needed amount of heat to melt and join weld metals.
An electric current runs through the electrode, melting it and forming a weld pool.
The layer of flux covering the electrode melts and ensures the weld pool does not get contaminated by the elements.
The flux creates a layer of slag on the weld bead.
This layer needs to be chipped and brushed off when the weld is complete.