Which welding process uses a consumable electrode that melts and provides flux to shield the weld?

Which welding process uses a consumable electrode that melts and provides flux to shield the weld?

• A. TIG Welding (GTAW)
• B. Laser Welding
• C. SMAW - Shielded Metal Arc Welding
• D. MIG/MAG Welding (GMAW)

Answer: (C)

In welding, shielding comes from how the arc is protected. The process described uses a consumable electrode that melts as it runs, and its coating (flux) also melts and provides the shielding. The flux decomposes to form protective gases and a slag on the weld, keeping the molten metal from being contaminated by the atmosphere. Because the electrode itself is consumed and the shielding comes from the flux coating, this is distinctive of shielded metal arc welding. Other processes shield the weld differently: TIG uses a non‑consumable tungsten electrode with an external inert gas shield; laser welding relies on a focused energy source with no flux or consumable electrode; MIG/MAG uses a continuously fed wire with shielding gas rather than a flux-coated electrode.

In welding, shielding comes from how the arc is protected. The process described uses a consumable electrode that melts as it runs, and its coating (flux) also melts and provides the shielding. The flux decomposes to form protective gases and a slag on the weld, keeping the molten metal from being contaminated by the atmosphere. Because the electrode itself is consumed and the shielding comes from the flux coating, this is distinctive of shielded metal arc welding. Other processes shield the weld differently: TIG uses a non‑consumable tungsten electrode with an external inert gas shield; laser welding relies on a focused energy source with no flux or consumable electrode; MIG/MAG uses a continuously fed wire with shielding gas rather than a flux-coated electrode.