Dissolved gases, particularly oxygen and carbon dioxide, can also pose significant risks in boiler systems. Oxygen facilitates corrosion, while carbon dioxide can combine with water to form carbonic acid, lowering pH and increasing corrosive potential. Deaerators are utilized to remove these gases from the feedwater, but often, chemical oxygen scavengers such as hydrazine or sulfites are included in the treatment regimen. These compounds effectively neutralize dissolved oxygen, protecting the boiler from corrosion.