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Curious about shielding gas, purging & trailing gas? Know the answers!

570 views · Aug 11, 2022
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What is Gas shielding in welding? During the welding operation, the air in the welding region is displaced by a shielding gas (either externally supplied or generated by burning of coating from the electrode) in order to avoid contamination of the molten weld pool. This weld contamination is produced mostly by nitrogen, oxygen, and water
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