Question

When SMAW welding on carbon steel, what polarity is most commonly used?

1) Direct current electrode positive (DCEP)
2) Direct current electrode negative (DCEN)
3) Alternating current (AC)
4) No polarity is used in SMAW welding

Answer 1

The most commonly used polarity for SMAW welding on carbon steel is Direct Current Electrode Positive (DCEP), as it provides deep penetration and a clean weld.

Step-by-step explanation:

When SMAW welding on carbon steel, the most commonly used polarity is Direct Current Electrode Positive (DCEP). DCEP is preferred because it provides deep penetration of the weld and facilitates a cleaner weld area by removing impurities on the surface of the workpiece. DCEP also helps in establishing a stable arc and ensures that more heat is generated in the workpiece as opposed to the electrode, which is beneficial for welding thicker materials.