Tungsten inert gas welding is also called Gas tungsten arc welding. It is a process that uses tungsten electrode to create a weld. The electrode and weld area is shielded from oxidation through the use of an inert shielding gas. Like other welding process, it also makes use of a filler metal.
TIG welding is commonly used to weld nonferrous metals and stainless steel. However, it can be used with almost all metals with the exception of zinc and similar alloys. It can also be used to weld dissimilar metals. However, it is much harder. TIG welding is commonly used to weld dissimilar metals to prevent the oxidation and corrosion of said materials.
This process requires the use of two hands. The filler metal is feed into the welding area. Simultaneously, the other hand controls the welding torch. It is widely used despite the difficulty in its mastery because it affords the operator greater control. A skilled operator must maintain cleanliness, check level of heat and use proper tools to insure quality welds.
Image source: Miller Welders
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