Epoxy Ester


Definition - What does Epoxy Ester mean?

Epoxy esters are synthetic chemical substances that are used as corrosion inhibitors on metallic surfaces. They are polymer based and typically in the form of adhesives or paints. They can be found in coatings, resins and a wide range of other substances used to prevent corrosion.

Corrosionpedia explains Epoxy Ester

Epoxy esters act as inhibitor coatings. They do this by forming a passivation layer on the substrate metal to be protected. This prevents the absorption and reactivity with water, chemicals and other corrosion causing substances. This passivation generates electrochemical polarization, thereby reducing reactivity.

When applied to a metal's surface, epoxy esters harden to form a highly protective additional layer, which increases the durability and toughness of the metal.

Metals that form porous reactive surfaces (e.g., iron) are more prone to corrosion due to increased ion exchange reactivity. These metals therefore need a protective inhibitor coating to counteract this reactivity. Epoxy esters make good inhibitors for such metals.

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