Welder Red Seal · Question
A welder is setting up for an open-root pipe weld in the 6G position using an E6010 electrode for the root pass. The welding machine is DC capable. Which polarity should be selected for starting the root and ensuring proper penetration?
E6010 electrodes perform optimally with DCEP (Direct Current Electrode Positive) for root passes due to the deep penetration and forceful arc it provides. This
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Question: A welder is setting up for an open-root pipe weld in the 6G position using an E6010 electrode for the root pass. The welding machine is DC capable. Which polarity should be selected for starting the root and ensuring proper penetration?
Answer options:
- AC (Alternating Current) ✅ DCEP (Direct Current Electrode Positive)
- DCEN (Direct Current Electrode Negative)
- Pulsed DC
Correct answer: DCEP (Direct Current Electrode Positive)
Explanation: E6010 electrodes perform optimally with DCEP (Direct Current Electrode Positive) for root passes due to the deep penetration and forceful arc it provides. This polarity concentrates about two-thirds of the arc heat at the electrode, aiding in burning through contaminants and achieving full penetration.
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