What are the two common types of electrodes used in arc welding?

The two common types of electrodes used in arc welding are consumable and non-consumable electrodes. Consumable electrodes, such as that used in MIG and stick welding, melt and become part of the weld bead during the welding process. This makes them practical for a variety of applications because they help create the filler material necessary for the weld. On the other hand, non-consumable electrodes, like tungsten used in TIG welding, do not melt during the welding process. Instead, they provide the arc for the welding operation while requiring a separate filler material to be added if needed. Understanding the distinctions between these two types of electrodes is crucial in selecting the right welding process for specific applications and materials.

Other options presented do not describe the fundamental categories of electrodes in welding. Solid and tubular refer to physical shapes of electrodes but do not define their functional categories. Cast and forged pertain more to material processes than to welding electrodes. Low-carbon and high-carbon specify the carbon content in steels rather than types of electrodes. Thus, the correct understanding of consumable and non-consumable electrodes is essential for any welding professional.