If you check your weld and see a heavy coating of carbon, what is the problem?

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Multiple Choice

If you check your weld and see a heavy coating of carbon, what is the problem?

Explanation:
Heavy carbon on a weld signals hydrocarbon contamination in the welding setup. Oils and greases on the cable, clamps, or nearby surfaces vaporize and carbonize under the arc, leaving a dark, carbonized film on the weld and degrading quality. The remedy is to remove these contaminants by cleaning the cables and attachments with a solvent and re-welding after everything is dry. Other issues like excess flux, dirt on the mold, or a dirty welding rod would produce different symptoms (flux residue, surface inclusions, or slag-related defects) rather than a carbon coating from oil and grease.

Heavy carbon on a weld signals hydrocarbon contamination in the welding setup. Oils and greases on the cable, clamps, or nearby surfaces vaporize and carbonize under the arc, leaving a dark, carbonized film on the weld and degrading quality. The remedy is to remove these contaminants by cleaning the cables and attachments with a solvent and re-welding after everything is dry. Other issues like excess flux, dirt on the mold, or a dirty welding rod would produce different symptoms (flux residue, surface inclusions, or slag-related defects) rather than a carbon coating from oil and grease.

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