What is "deaeration"

n. (context chemistry English) The process of removing dissolved gasses from a liquid.

Deaeration is the removal of air molecules (usually meaning oxygen) from another gas or liquid. It can refer to:

• Use of a deaerator.
• Degasification, the removal of dissolved gases, such as oxygen, from liquids.

Deaeration is used in the upstream oil & gas industry to remove oxygen from seawater, preventing or reducing corrosion, and growth of bacteria. It is also used in the process inks and coatings industry to prevent foaming during production and get a higher quality print or coating layer without air bubble defects.