Welding galvanized steel can produce more fumes than welding uncoated steel, because the zinc coating can vaporize and oxidize in the welding arc.

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According to the American Welding Society (AWS) Fact Sheet #25, metal fume fever may be caused by exposure to excessive concentrations of welding fume containing zinc, magnesium, copper and cadmium.

We’re sure [Tim] knows that welding galvanized steel can lead to metal fume fever, so we were hoping the video would caution viewers to remove the zinc coating on those parts before welding.

Ridges and lines thicker than the nearby galvanized coating are caused by varying rates of reaction of the zinc with the steel surface because of stress areas on the steel surface or the presence of ...