MIG welding or commonly known as metal inert gas welding uses inert gases such as argon in the welding process. Its more technical term is gas metal arc welding (GMAW).

History of MIG welding

This process has been developed during the Second World War with a view to meeting the demands for weapons, which lasted until the postwar period.

Nature of the welding process

Basically this type of welding uses argon and other inert gases during the process. The use of inert gases differentiates it from MAG welding which uses active gases such as carbon dioxide.

These inert gases provide shielding and protection for the puddle and welding arc.

Significant advantages of the welding process

First, the simplicity of the procedure involved. The whole process requires constant contact between the electrode and the welding arc. This contact, which can also be described as “feed”, allows the arc to remain in a fixed position thus facilitating the production of welds.

The frequent use of MIG welding in most homes is proof of the simplicity of this procedure.

Furthermore, such simplicity contributes greatly to the speed of the process and, in turn, to its relatively lower costs.

Second, you get high-quality results. It generally uses inert gases for splash protection. Less spatter results in cleaner surfaces with a hint of aesthetic appeal.

In addition, it can be performed in any position; therefore, it provides more flexibility to the welder. This also ensures a high quality weld even in confined areas.

The current use of this process in automation, robots, car hoods and the like demonstrates the optimal quality of the welded surfaces.

Third, the applicability of the welding process to a wide range of metals. Metals ranging from common aluminum to the rare and brittle thin sheets used in car bodies can be subjected to this process.

Major disadvantages of the welding process

There are two major disadvantages to this welding process: a) the complete focus and concentration that the process requires; and b) its inapplicability in certain cases.

Full focus and concentration is necessary throughout the process, as it involves constant contact between the electrode and the welding arc; therefore, even the mundane act of scratching one’s hair is not possible.

With regard to the second disadvantage, the process is inapplicable in thick steel welding due to its inability to penetrate the surface well. Also, when metal surfaces are not clean, this welding process cannot produce optimal results.

In fact, the disadvantages of MIG welding are outweighed by its advantages, particularly the simplicity of its procedure. Such simplicity allows even an inexperienced user to weld only a few broken fittings at home.