Microencapsulation of corrosion inhibitors: a review

Corrosion is a global issue that causes significant damage across industries. To mitigate its harmful effects, researchers have developed innovative solutions, including microcapsule-embedded coatings. This cutting-edge technology enables sustainable, long-lasting protection against corrosion by releasing inhibitors in response to the pH of the surrounding environment.

The study explored a wide range of shell materials compatible with corrosion inhibitors such as quinoline, azoles, and MBT. Researchers found that the limitations of bio-based shell materials, such as chitosan and ethyl cellulose, can be overcome with optimised synthesis techniques. Urea-formaldehyde and other amino resin shells were highlighted for their ability to encapsulate a wide variety of compounds and for their effectiveness in creating dual-shell and hybrid-shell systems.

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Diversity of shell materials and controlled release

Materials such as acrylates and polystyrene were also found to be effective for encapsulating complex structures that allow long-term storage and slow release of corrosion inhibitors. These advancements in microencapsulation technology offer sustainable solutions for corrosion protection and extend the functional capabilities of protective coatings.

Source: Mhatre, A. M. & More, A. P., Microencapsulation of corrosion inhibitors: a review. Journal of Coatings Technology and Research, Volume 23, Pages 103–171, 2026. DOI: https://doi.org/10.1007/s11998-025-01144-1.

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