Does sulfur dioxide cause corrosion of carbon steel at high temperatures (350°C)?
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An acidic gas (with 67.7% volume fraction of H2S) is emitted after combustion; the flue gas temperature is 350°C. Will S2O in the flue gas cause corrosion to carbon steel? Thank you!
If the water in the flue gas is not at saturation and no water condenses, there will be no problems. The temperature of normal flue gas is around 120 degrees. Depending on the composition of the flue gas, the exhaust temperature varies; one of the reasons for this is to prevent corrosion. Of course, factors such as energy recovery also affect the exhaust temperature. This post was last edited by Albertlu on 2009-2-24 at 11:41
Agree with what was said on the 2nd floor: the reaction between sulfur dioxide and iron is slow, but when acid corrodes steel along with some chemical reactions, the speed increases. Therefore, it’s possible to check for the presence of water vapor (though this is unlikely at 350 degrees); it would be best to conduct experiments to verify this
Without steam entrainment, above the dew point, no corrosion of carbon steel occurs. Corrosion that may occur before condensation should be prevented.
Agreed. The main type of corrosion in smoke pipelines is dew point corrosion; avoiding the dew point should solve the problem