This method is a process using arc welding, created between the consumable electrode and the workpiece. The electrode is a wire passed to the unit continuously. Arc and the molten weld pool are protected by the shielding gas supplied along with the wire.
MIG – (Metal Inert Gas) – this name refers to a welding process when the shielding gas is a chemically inert gas, like argon or helium.
MAG – (Metal Active Gas) – this name refers to a welding process when the shielding gas is a chemically active gas, like CO2.
MAG method is used to joining non-alloy, high and low alloyed steel structures, on the other hand MIG welds aluminum, magnesium, copper and other non-ferrous metals and metal alloys. Very often, a mix of inert and active gas is used, such as argon or carbon dioxide in varying proportions (MIG/MAG method)
Tungsten Inert Gas (TIG) welding is also a process that uses welding arc. However, it is created by non-consumable tungsten electrode protected by inert shielding gas. This method allows to weld materials by fusing them togehter or by manually adding additional material to the molten weld pool
TIG method grants high quality of welding and cleanliness. Weld does not have any precipitations and does not require cleaning after the process is ended. For this reason, TIG welding is perfect for stainless steel, acid-resistant steel and other metals which demand using inert shielding gas (aluminum, cooper, titanium). The most commonly used shielding gas is argon or argon-helium; less frequently helium alone, which raises heat energy of the arc and the welding speed, therefore worsens the stability of the arc.
Welding with coated electrode (Manual Metal Arc welding) is a manual arc welding process that uses a consumable electrode covered with a flux to lay the weld. An electric current forms an electric arc between the electrode and the metals to be joined. The coat melts during welding, due to high temperatre, giving a wide range of chemicals. The basic ones are gases forming the shield of the weld pool against oxidation.
The remaining ones consist of slag, which during the melting of the coating travels with the molten metal of the electrode core into the weld pool from which it flows, forming a hard crust on the weld surface during cooling. The slag coating protects against oxidation during cooling of the weld, but must be removed before the next technological process, i.e. before painting or laying another layer of weld.
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