ZY20 Galvanized Tube Mill Machine φ10-26mm Round Steel Pipe 0.4-1.5mm 90m/min HF Welding Line

Zinc Burn-Back When Welding Galvanized Strip Galvanized coil saves a post-plating step, but welding it burns the zinc at the seam and leaves a grey, corroded line that buyers reject. Mills that overheat the weld zone also clog tooling with zinc fumes, shortening roll life and raising maintenance. Why Galvanized Strip Burns at the Weld Zinc vaporizes at a much lower temperature than steel, so an unguided or over-driven seam overheats the coating and leaves wide burn-back.