Oxygen scavengers for Boiler Water
Oxygen scavengers are best fed to the storage section of the deaerator or feedwater tank. In most low-pressure industrial boiler systems, if oxygen remains in the feedwater and enters the boiler, it is too late to remove all of the oxygen and protect the boiler and condensate from oxygen corrosion. A residual of sulfite or other.
Oxygen scavenger in the boiler cannot chemically reduce all of the oxygen before it escapes with the steam or reacts with the metal surfaces.