MetFab - Welding Fume Handbook - Flipbook - Page 36
10 Effect of shielding gas: carbon monoxide
I
5
4
I
3
I
2
I
CO emission rate ml/s
4.4
3.8
1.9
1.5
1.4
I
1
0
Inomaxx®2
93%Ar/5%CO/25%O
Ferromaxx®7
92%Ar/8%CO
Ferromaxx®15
shielding gas
Figure 29: The effect of shielding gas on carbon monoxide emission rate
during MAG welding of mild steel with spray transfer
TIG
5.0
I
4.5
I
4.0
I
3.5
I
3.0
I
2.5
I
2.0
I
1.5
I
1.0
I
0.5
I
CO emission rate ml/s
Generally, the emission rate of carbon monoxide does indeed
increase with the concentration of carbon dioxide in the
shielding gas.
0
I
2
I
4
I
6
I
8
I
10
I
12
I
14
I
16
% CO in shield gas
Figure 30: The effect of Ar/CO, and Ar/CO, 10, mixtures on carbon monoxide
emission rate during MAG welding of mild steel with spray transfer
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