Oxygen The Cause of Corrosion • The addition of oxygen to a system with water and heat will initiate corrosion. • Heat, found in the feed water system, is a driving force for corrosion • Mechanical deaeration, can remove most, but not all of the oxygen from the water. • An oxygen scavenger is used to eliminate the remaining oxygen.Get A Quote
Oxygen is a natural component of virtually all water supplies and will be present as a dissolved gas at maximum saturation levels determined by water temperatures. At feedwater and boiler water temperatures, the corrosivity of even small concentrations of oxygen is greatly accelerated over what would be expected at ambient temperatures.Get A Quote
Dec 17, 2019 · After stopping the boiler, with the decrease of pressure and temperature, the water in the boiler vapor condenses into water, so there will be a vacuum inside the boiler. If the external air leaks into the furnace, Oxygen can easily corrode the metal when with water and steam.Get A Quote
Oxygen corrosion can be recognized by pits, typically found in the top of the steam drum or at the water line. Oxygen pitting & scale formation can destroy piping and boiler tubes as well as interfere with heat transfer and the operation of pressure reducing valves & trap mechanism.Get A Quote
Oxygen is highly corrosive when present in hot water. Even small concentrations can cause serious problems: iron oxide generated by the corrosion can produce iron deposits in the boiler. Oxygen corrosion may be highly localized or may cover an extensive area. …Get A Quote
Causes: Most commonly associated with excessive deposition on ID tube surfaces, coupled with a boiler water low pH excursion. Water chemistry upset, such as what can occur from condenser leaks, particularly with salt water cooling medium. Leads to acidic (low pH) contaminants that can be concentrated in the deposit.Get A Quote
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