Monoethylene Glycol (MEG)
Definition - What does Monoethylene Glycol (MEG) mean?
Monoethylene glycol is a chemical substance that is produced by the reaction of ethylene or ethylene oxide. It is used as a corrosion inhibitor in antifreeze and in coolants, and in the manufacturing of polyester.
Corrosionpedia explains Monoethylene Glycol (MEG)
Monoethylene glycol is miscible in ethanol, acetone and water.
Monoethylene glycol is used as an inhibitor coating compound, which is a protective barrier in the form of a solid, film or fluid applied to a metallic surface to prevent corrosion. These barrier coatings possess chemical or physical properties that prevent corrosion reactivity and/or material degradation due to external factors.
Inhibitor coatings generate a passivation layer on the metal they protect, which prevents contact with water, chemicals and other corrosion causing materials. Passivation reduces the reactivity by electrochemical polarization.