Smart protective coatings with self‐sensing and active corrosion protection dual functionality from pH-sensitive calcium carbonate microcontainers

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Smart protective coatings with self‐sensing and active corrosion protection dual functionality from pH-sensitive calcium carbonate microcontainers

Review (2022)

Author(s)

Tong Liu (University of Science and Technology Beijing)

Dawei Zhang (University of Science and Technology Beijing)

Lingwei Ma (University of Science and Technology Beijing)

Yao Huang (University of Science and Technology Beijing)

Xiangping Hao (University of Science and Technology Beijing)

Herman Terryn (Vrije Universiteit Brussel)

Arjan Mol (TU Delft - Team Arjan Mol)

Xiaogang Li (University of Science and Technology Beijing)

Research Group

Team Arjan Mol

Corrosion Active corrosion protection Corrosion sensing Microcontainers Organic coatings

DOI related publication

https://doi.org/10.1016/j.corsci.2022.110254 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:1af5edc9-1184-4bb7-85ba-014af3649369

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Publication Year

2022

Language

English

Research Group

Team Arjan Mol

Bibliographical Note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Journal title

Corrosion Science

Volume number

200

Article number

110254

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Abstract

Herein, we report the development of a self-sensing and active corrosion protection coating which incorporates pH-sensitive multilayer chitosan/alginate-covered CaCO₃ microcontainers containing 1,10-phenanthrolin-5-amine (APhen). The microcontainers can respond to pH variation to release APhen which serves not only as a corrosion indicator but also as an inhibitor. An epoxy coating doped with 5 wt% microcontainers exhibited improved corrosion performance and was capable of inhibiting corrosion spreading from the damaged area in a 3.5 wt% NaCl solution. The salt spray test showed that corrosion damage can be quickly detected by the appearance of a red color within 2 min.