In Boiler Water
How dissolved gases are dangerous for your boiler?
Below is a detailed description of how oxygen and carbon dioxide affect boiler performance.
Effect of oxygen
Effect of Temperature on Corrosion
Effect of carbon dioxide:
Because the deaeration process removes the gases from the feed water, the make-up water after deaeration often has no CO2 content. It is the condensate that contains CO2 most frequently, therefore the condensate tank quite often experiences CO2 corrosion. The decomposition of carbonate and bicarbonate in condensate under boiler conditions is typically what causes the presence of the gas in condensate. Both oxygen and free carbon dioxide can be removed from the feed water by heating it in the feed tank and keeping it there while it is being delivered to the boiler.