Severe corrosion
to superheater tubes at high temperatures was
gained virtually by gaseous corrosion media, such as HCl and SO
2
, in the municipal solid waste incineration flue gas. To clarify
the effect of varying concentrations of HCl and SO
2
in
the oxidizing atmosphere on the corrosion of 12Cr1MoV, a commercial
alloy used in superheaters, two series of corrosion tests under simulated
flue gas were performed. Both the corrosion kinetics and corrosion
morphology were measured in this work. The results of the present
study demonstrated that the addition of HCl was more corrosive than
that of SO
2
under an oxidizing atmosphere. The increased
HCl concentration had an accelerating effect on the corrosion rate,
but the relation between the two was not linear. In contrast, SO
2
exhibited a negligible or even inhibitory effect on corrosion.
Both series of test results consistently proved that the temperature
had a significant influence on the corrosion of 12Cr1MoV alloy, in
particular at 580 °C.