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Controlled release of corrosion inhibitors in self-healing coatings: Tannic complexes coated nanocontainers

Researchers encapsulated corrosion inhibitor in mesoporous silica nanoparticles (MSNs) with the help of tannic acid complexes which provide the inhibitor loaded MSNs with pH-controlled release function. Then, 2 wt% of benzotriazole-loaded nanocontainers were impregnated to commercial water-borne alkyd coating and self-healing effect after 20 days of immersion in 0.1 M NaCl solution was investigated by electrochemical impedance spectroscopy and microscopy. The results showed that the impedance modulus of coating with nanocontainers increased from 4.7 × 104 Ω cm2 to 1.8 × 105 Ω cm2 after 15 days of immersion.

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Journal reference: Electrochimica Acta, Volume 297, 20 February 2019, Pages 1035-1041

Provided by: Copyright © 2018 Elsevier B.V. or its licensors or contributors

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