Which of the following is a function of SAW flux?

Which of the following is a function of SAW flux?

• A. Protect the weld pool from the atmosphere
• B. Increase the weld color
• C. Increase corrosion in the weld
• D. Reduce arc stability

Answer: (A)

In submerged arc welding, the flux’s primary job is to shield the molten weld pool from the atmosphere. When the arc is buried under flux, the flux melts and forms a protective slag that covers the weld pool, keeping oxygen, moisture, and other contaminants away as the metal cools. This shielding prevents oxidation and porosity and helps the weld metal achieve the desired properties. The slag also aids deoxidation and can influence the weld chemistry, but the essential idea here is protection of the weld pool from the atmosphere. The other statements describe effects that are not the main shielding function.

In submerged arc welding, the flux’s primary job is to shield the molten weld pool from the atmosphere. When the arc is buried under flux, the flux melts and forms a protective slag that covers the weld pool, keeping oxygen, moisture, and other contaminants away as the metal cools. This shielding prevents oxidation and porosity and helps the weld metal achieve the desired properties. The slag also aids deoxidation and can influence the weld chemistry, but the essential idea here is protection of the weld pool from the atmosphere. The other statements describe effects that are not the main shielding function.