Welding Galvanized Steel Effects. Galvanize poisoning is a condition that results from the over exposure to zinc oxide. However the resulting weld may present many issues such as excessive porosity unacceptable bead appearance lack of fusion cracks and excessive spatter.
This results from the variation in boiling points between zinc lower and steel. In multi-line welding the stomatal sensitivity of subsequent welding lines is greater than that of the previous one. If you take a break from welding over the weekend or over a holiday the symptoms will often come back again the next time you weld on galvanized metal.
Welding specifications are derived from the American Welding Society AWS 0190 Welding Zinc Coated Steel.
When you arc weld galvanized steel the heat produced by the welding arc is high enough to vaporize the zinc coating. Traces of lead in the galvanizing coating of steel. The process of welding galvanized steel is commonly found in the metal fabricating industry. Cated in Figure 1 from the base metal across the weld metal after welding of an industrial low carbon steel 019 wt.