1. Gas Tungsten Arc Welding (GTAW or TIG)

2. Effects of Polarity Gas Tungsten Arc Welding

3. Advantages Superior quality welds, generally free from spatter, porosity, or other defects Precise control of arc and fusion characteristics Weld almost all metals Used with or without filler wire Easily automated Used in all positions Intricate geometries weldable Gas Tungsten Arc Welding

4. Disadvantages Less economical than consumable electrode processes for sections thicker than 3/8 inch Lowest deposition rate of all arc processes Tungsten inclusions Higher operator skill Required Sensitive to drafts Gas Tungsten Arc Welding