Where is the flux deposited relative to the arc in SAW?

• A. Slightly ahead of the arc.
• B. Behind the arc.
• C. Directly on the weld puddle.
• D. Directly on the base metal.

Answer: (A)

In submerged arc welding, shielding comes from the flux that is fed into the arc region ahead of the weld travel. The flux melts as the arc approaches and immediately forms a protective slag layer over the newly melted weld metal, keeping it shielded from the atmosphere and helping control deoxidation and alloying. Depositing flux slightly ahead of the arc ensures continuous coverage as the weld pool forms; placing flux behind the arc would leave the fresh metal unprotected, and putting flux directly on the puddle or on the base metal would not provide effective shielding for the molten metal.