Oxygen in the boiler water causes ________.

Quesiton : Oxygen in the boiler water causes ________.

Answer: pitting

Oxygen in the boiler water causes ________. How can the answer be improved? 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. Whenever air enters inside the boiler (during maintenance or when boiler is not operating the air enters inside the boiler and the oxygen in the air reacts with the steel and the corrosion starts. The corrosion is the iron oxide (FeO2). Oxygen in the boiler water causes internal pitting of the tube wall by combining with: 1. Hydrogen which accelerates cathode reaction corrosion 2. Hydrogen to form low pH water which then attacks the internal water walls 3. Iron to form iron oxide and other corrosion products that cover the perforations in the tube walls 4. In boiler feedwater conditioning the hardness of water can cause the formation of scale on evaporative surfaces as well as excessive sludge or "mud " unless properly treated. Hardness may also cause scale and deposits in feedwater heaters feedlines and … Oxygen-free alkaline boiler water converts iron to magnetite Fe 3 O 4. Migratory magnetite deposits on the protective layer and is normally gray to black in color. Migratory magnetite deposits on the protective layer and is normally gray to black in color. Although there are many causes of low boiler water pH it most frequently occurs when brackish water is used for condenser cooling. Small quantities of magnesium chloride in particular have caused extremely low pH excursions requiring very close supervision and detection of very low levels of contamination in the condensate. Boiler Dissolved Oxygen Control on IC Controls | Dissolved Oxygen (DO) is a measure of the amount of oxygen usually thought of as a gas that is dissolved in a liquid such as water . Oxygen is essential to life and is also the most common element found taking part in corrosion reactions. DO can be… Dissolved Oxygen and Corrosion. ... It is therefore desirable to provide alternate boiler water treatment chemicals which are generally free of the dangers inherent in the use of hydrazine but which effectively scavenge oxygen and passivate steel surfaces under typical boiler conditions.