Which polarity is used for FCAW?

Which polarity is used for FCAW?

• A. Direct current electrode positive
• B. Direct current electrode negative
• C. Alternating current
• D. Direct current electrode neutral

Answer: (A)

Polarity controls how heat is distributed in the arc and how the shielding flux behaves. In flux-cored arc welding, using direct current electrode positive puts more heat into the workpiece, which promotes deeper penetration and faster deposition, and it helps the flux-cored wire fuse reliably with the base metal. The arc tends to be more stable with this setting, and the flux core provides the necessary shielding while slag forms properly to protect the weld. While other polarities can be used in specialized setups, the standard practice for FCAW is to run with the electrode positive, making direct current electrode positive the best choice.

Polarity controls how heat is distributed in the arc and how the shielding flux behaves. In flux-cored arc welding, using direct current electrode positive puts more heat into the workpiece, which promotes deeper penetration and faster deposition, and it helps the flux-cored wire fuse reliably with the base metal. The arc tends to be more stable with this setting, and the flux core provides the necessary shielding while slag forms properly to protect the weld. While other polarities can be used in specialized setups, the standard practice for FCAW is to run with the electrode positive, making direct current electrode positive the best choice.