What terminal is the ground connected to during TIG welding of stainless steel?

In TIG (Tungsten Inert Gas) welding of stainless steel, the ground is typically connected to the positive terminal. This configuration allows for greater heat concentration at the workpiece, which is crucial when welding stainless steel.

The process of TIG welding relies on the ability to control the heat input very precisely to avoid warping, contamination, and other problems that can arise with stainless steel due to its specific alloying components. By using the positive terminal as the ground, the arc forms more efficiently, enhancing the welding quality and performance. This setup also helps in producing a cleaner weld, which is particularly important for stainless steel to retain its corrosion-resistant properties. The inert gas typically used in TIG welding, usually argon, further protects the weld area from oxidation and contamination.

The choices that do not involve the positive terminal would not provide the optimal conditions needed for this process, resulting in diminished weld quality and increasing the potential for defects.