Arc Gouging Basics (part 3): Gouging Back To Sound Metal Apr 2026

Back-gouging is essential for removing root defects, slag, and lack of fusion from the backside of a weld to achieve full 100% penetration. The process involves carving down to "sound metal"—indicated by a bright, clean, and shiny U-groove—followed by grinding to remove carbon deposits before the final weld pass. You can read the full, detailed guide to the process on the Miller Welders website.