During FCAW, should slag be removed between passes, and why?

Study for the Gas Metal Arc Welding Exam, including GMAW, FCAW, and MCAW methods. Use flashcards and multiple choice questions with hints and explanations for effective learning. Get ready for your welding certification!

Multiple Choice

During FCAW, should slag be removed between passes, and why?

In FCAW the flux in the wire creates a protective slag that covers the weld as it cools. That slag must be chipped away between passes. If you leave it, the next weld layer won’t fuse properly with the previous bead, and slag inclusions or trapped slag can become defects in the weld. Removing the slag between passes ensures a clean surface for good fusion and minimizes the risk of weld faults. Slag is indeed formed in FCAW, and options suggesting it’s optional or that slag isn’t formed are not accurate.

In FCAW the flux in the wire creates a protective slag that covers the weld as it cools. That slag must be chipped away between passes. If you leave it, the next weld layer won’t fuse properly with the previous bead, and slag inclusions or trapped slag can become defects in the weld. Removing the slag between passes ensures a clean surface for good fusion and minimizes the risk of weld faults. Slag is indeed formed in FCAW, and options suggesting it’s optional or that slag isn’t formed are not accurate.

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