8 Effect of shielding gas: particulate fume7I6I5I6.75.55.04.54I3I2I1IFume emission rate mg/sI895% Ar/5% CO4.44.298% Ar/2% CO93% Ar/5% CO/2%OFerromaxx® 792% Ar/8% COFerromaxx® 15Figure 9: The effect of shielding gas on fume emission rateduring MAG welding of mild steel with dip transfer2529.2I20I1512.29.2I10IFume emission rate mg/sI306.76.9I513.495% Ar/5% CO98% Ar/2% CO93% Ar/5% CO/2%OFerromaxx® 792% Ar/8% COFerromaxx® 15Figure 10: The effect of shielding gas on fume emission rateduring MAG welding of mild steel with spray transferFor each shielding gas, spray transfer gives higher fumeemission rates than dip transfer. For a given transfer mode,however, the choice of shielding gas has relatively little effecton fume emissions.21
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