Welders have to deal with dangerous fumes every day. Here you can find an overview which fumes can be found and where they are produced.

1. HAZARDOUS
SUBSTANCES
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Iron oxides, as they are produced in practically all thermal
separation and joining processes of steel.
Manganese and its compounds, which are mainly released
from manganese-containing filler materials in arc welding
processes.
Zinc oxide produced during the welding of zinc sheets.
Nickel and chromium(VI) compounds formed during weld-
ing and cutting of chromium-nickel steels.
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Nitrogen oxides (nitrous gases) formed by the oxidation
of atmospheric nitrogen at the edge of an oxyfuel flame
or arc.
Carbon monoxide produced by the incomplete combus-
tion of carbon, especially when the burner is poorly adjust-
ed in oxyfuel processes.
Ozone (O3), which is produced by the high-energy UV
rays from atmospheric oxygen (O2), in particular during
gas-shielded welding of radiation-reflecting materials.
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