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Deaeration

Last updated: July 19, 2024

What Does Deaeration Mean?

Deaeration is the process by which air is removed from a substance where the air has mixed with or dissolved in the substance. Deaeration is used for liquids, soils and foods to improve their quality and reduce contamination, and to remove oxygen from vessels that contain liquids to reduce the corrosion rate.

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Corrosionpedia Explains Deaeration

Deaeration of liquids (usually water) is achieved by passing the liquid through a tank (known as a deaeration tank) where reactions occur that remove the dissolved oxygen. Uses of deaeration include:

  • Processing feedwater for steam boilers
  • Steam turbine systems
  • Thermal power plants
  • Chemically reducing a compound dissolved or suspended in water

Deaeration relies on the principle that the solubility of a gas in water decreases as the water temperature increases until it attains saturation.

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