What is a primary cause of dissolved oxygen corrosion in boilers?

Dissolved oxygen corrosion in boilers primarily occurs due to the presence of oxygen in the feed water, which can form corrosive compounds when it reacts with metal surfaces. A malfunctioning Deaerating Feed Tank (DFT) can lead to inadequate removal of dissolved gases, including oxygen. When a DFT is not working properly, it fails to effectively reduce the dissolved oxygen levels in the water before it enters the boiler system.

This increases the likelihood of corrosion in the boiler’s metal components, as the unremoved oxygen promotes oxidation reactions that can lead to pitting and general material degradation. Proper functioning of the DFT is critical for the maintenance of boiler integrity and the prevention of corrosion-related issues. The focus on DFT here highlights its crucial role in the overall water treatment process, which is essential in protecting the boiler from the detrimental effects of dissolved oxygen.