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Corrosion effects when cooling below the acid dew point

Heat recovery from flue gases below the acid dew point often raises concerns about corrosion of downstream equipment. The infosheet at the bottom of this page explains why these concerns are unfounded when polymer heat exchangers are used. Because sulphuric acid already condenses inside the heat exchanger, the acid dew point of the cooled flue gas is significantly reduced. As a result, corrosivity decreases and corrosion rates remain within design limits. Field measurements confirm that downstream equipment continues to operate safely and reliably.