Welder Red Seal · Question
A welder is experiencing an unstable arc and excessive spatter when welding a fillet weld in the 2F position using an E6010 electrode. The machine is set to DCEN. What is the most likely cause of these issues?
E6010 electrodes are designed to run on DCEP (reverse polarity) to achieve deep penetration, a forceful arc, and good fusion. Using DCEN (straight polarity) wit
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Question: A welder is experiencing an unstable arc and excessive spatter when welding a fillet weld in the 2F position using an E6010 electrode. The machine is set to DCEN. What is the most likely cause of these issues?
Answer options: ✅ Incorrect polarity for E6010 electrodes.
- Amperage setting is too low.
- Insufficient arc length.
- Electrode is contaminated.
Correct answer: Incorrect polarity for E6010 electrodes.
Explanation: E6010 electrodes are designed to run on DCEP (reverse polarity) to achieve deep penetration, a forceful arc, and good fusion. Using DCEN (straight polarity) with an E6010 electrode typically results in an unstable, erratic arc and increased spatter due to the concentrate heat at the electrode rather than the base metal. While low amperage or arc length can cause issues, incorrect polarity is a fundamental mismatch for E6010.
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