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Welding fumes
15
Can composition of welding fumes vary?
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Welding fumes contain oxides of metals from welded material
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Fluxes containing silica or fluoride produce amorphous silica, metallic silicates and fluoride fumes
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Mild steel welding contains mostly iron with small amounts of additive metals (Chromium, Nickel, Manganese,
Molybdenum, Vanadium, Titanium, Cobalt, Copper etc.)
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Stainless steels have larger amounts of Chromium and Nickel, lesser amounts of iron
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Nickel alloys have much more Nickel in fume and very little iron
How coatings change composition of welding fumes?
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Vapours or fumes can come from coatings and residues of welded metal
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Some ingredients in coatings can have toxic effects
Ingredients include:
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Metal working fluids, oils and rust inhibitors
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Zinc on galvanized steel ( vaporizes to produce zinc oxide fume )
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Cadmium plating vapours from paints and solvents
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Lead oxide, primer paints some plastic coatings
Metal coatings are a hazardous fume source
FresAir welding respirators offer the
ideal protection against the risks of
welding fumes
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