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Why is electrode coated with a flux in shielded metal arc welding?

Why is electrode coated with a flux in shielded metal arc welding? Correct Answer to protect the electrode

The electrode is coated with a flux in shielded metal arc welding. Heat from electric current causes the combustion and decomposition of electrode. This creates a gaseous shield to protect the electrode, metal and molten pool from atmospheric contamination due to oxidation.

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