Mig welding
MIG welding (Metal Inert Gas), also known as GMAW (Gas Metal Arc Welding),
is one of the most widely used welding methods in industry thanks to its
efficiency, simplicity and ability to produce strong and clean welds.

Technology and process
Welding torch:
A handheld welding torch is used to advance a continuous thread of filler material. The wire functions both as the electrode and as filling material.
Shielding gas:
An inert gas, usually argon or a mixture of argon and carbon dioxide, flows through the torch and protects the welding area from contamination by the oxygen and nitrogen of the air. This prevents oxidation and creates a clean weld.
Power source:
A constant current (DC) source is used to maintain a stable arc between the electrode (welding wire) and the workpiece.
Filling material:
The welding wire is fed continuously from a wire feeder and melts in the weld pool to create the weld joint. The wire can be of different materials depending on the base material being welded.
Advantages of MIG welding
Simplicity:
MIG welding is relatively easy to learn and use compared to other welding methods. It requires less skill than TIG welding.
Speed:
The process is fast and efficient, making it ideal for high-volume production.
Flexibility:
Can be used to weld a variety of metals including steel, stainless steel and aluminum.
Purity:
The inert gas atmosphere used prevents contamination, resulting in clean and strong welds.
Automation:
Well suited to automated and robotic welding processes, increasing productivity and repeatability.
Areas of use
The manufacturing industry:
Used to weld car bodies, bicycle frames, pipes and other components where strength and speed are important.
The construction industry:
Welding of structural components and steel frames.
Shipbuilding:
Welding of hulls and other marine components.
Hobbies and DIY:
Popular with DIYers and hobbyists for various welding projects due to its ease of use.
Important factors to consider
Material selection:
Different materials require different settings and types of welding wire. It is important to choose the right combination to achieve optimal results.
Shielding gas:
The choice of shielding gas affects the weld quality and penetration. Argon mixtures are often used to improve weld quality.
Power source and settings:
Correct setting of voltage, amperage and wire feed speed is essential to achieve a good weld.
Environment:
MIG welding is less suitable for outdoor use without adequate protection, as wind can affect the shielding gas and thus the welding quality.
Process variants
MAG welding (Metal Active Gas):
Similar to MIG welding but uses active gases such as carbon dioxide or mixtures of carbon dioxide and argon. This is often used for steel.
Pulsed MIG welding:
An advanced form where the current is pulsed to improve weld quality and reduce heat-induced distortion.