How to weld > Shielding gas
Arc types for MAG welding
Each arc type is confined to certain intervals of the current and voltage that are applied during the welding operation.
A schematic diagram for the emergence of short arc and spray arc is illustrated below.
Improper settings of the current and voltage can result in the formation of a globular arc that is more unstable. It is thereby undesirable in many types of welding performances.
The short arc and spray arc appearance for different levels of current and voltage settings during MAG welding with an Ar/CO2 shielding gas mixture. Welding is typically performed with D.C.
Other welding parameters also influence the emergence of the arc types, including the chemical composition of the shielding gas, the diameter of the consumable and the stick-out length of the wire from the contact nozzle.
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