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Tuesday, 12 November 2019
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Raw materials & technologies, Applications

Anti-corrosive bio-coatings based on quercetin

Tuesday, 29 October 2019

In a present investigation "phytochemical” quercetin (QCT) loaded in silica nanocontainers as the natural organic inhibitor was utilised to obtain active anticorrosive coatings.

The researchers used quercetin (QCT) as a natural organic inhibitor. Source: Free-Photos / Pixabay.

The researchers used quercetin (QCT) as a natural organic inhibitor. Source: Free-Photos / Pixabay.

With an artificial defect induced on the epoxy nanocomposite coating and subsequent corrosion reactions, active corrosion protection was triggered. The optimum performance was achieved from the 1.0 wt.% loaded coatings. The unscratched nanocomposite coatings were also examined and revealed enhanced corrosion protection in comparison with the unmodified epoxy coating.

Corrosion resistance by quercetin

The anticorrosive action of the bio-coatings was controlled by the release and reactions of the inhibiting component from the coating at pH 10. The corrosion protection offered by QCT was due to the chemical transformation experienced by QCT with pH influence involving possible autoxidation and polymerisation processes. Both immersion and electrochemical corrosion tests were employed in the study to systematically evaluate the corrosion protection.

The study is published in: Progress in Organic Coatings Volume 136, November 2019, 105276.

Image source: Pixabay

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