期刊
CORROSION SCIENCE
卷 200, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110254
关键词
Corrosion; Organic coatings; Microcontainers; Corrosion sensing; Active corrosion protection
资金
- National Natural Science Foundation of China [51771029]
- Fundamental Research Funds for the Central Universities [FRF-BD-20-28A2]
In this study, a self-sensing and active corrosion protection coating was developed using pH-sensitive microcontainers to release corrosion indicator and inhibitor, showing improved corrosion performance and capability to inhibit corrosion spreading.
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-5amine (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.
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