“Smart” micro/nano container-based self-healing coatings on magnesium alloys: A review

Yonghua Chen; Liang Wu; Wenhui Yao; Jiahao Wu; Maria Serdechnova; Carsten Blawert; Mikhail L. Zheludkevich; Yuan Yuan; Zhihui Xie; Fusheng Pan

Journal of Magnesium and Alloys (Jul 2023)

“Smart” micro/nano container-based self-healing coatings on magnesium alloys: A review

Yonghua Chen,
Liang Wu,
Wenhui Yao,
Jiahao Wu,
Maria Serdechnova,
Carsten Blawert,
Mikhail L. Zheludkevich,
Yuan Yuan,
Zhihui Xie,
Fusheng Pan

Affiliations

Yonghua Chen: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
Liang Wu: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; Corresponding author.
Wenhui Yao: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
Jiahao Wu: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
Maria Serdechnova: Institute of Surface Science, Helmholtz-Zentrum Hereon, Max-Planck Str. 1, 21502 Geesthacht, Germany
Carsten Blawert: Institute of Surface Science, Helmholtz-Zentrum Hereon, Max-Planck Str. 1, 21502 Geesthacht, Germany
Mikhail L. Zheludkevich: Institute of Surface Science, Helmholtz-Zentrum Hereon, Max-Planck Str. 1, 21502 Geesthacht, Germany
Yuan Yuan: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
Zhihui Xie: Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China
Fusheng Pan: National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China

Journal volume & issue: Vol. 11, no. 7
pp. 2230 – 2259

Abstract

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Coating technologies are a commonly used way to protect metals against corrosion. However, with more and more severe service environments of materials, many protective coating systems often are not environmentally friendly or toxic as in the case of chromates. Based on the world's abundant ideal magnesium (Mg) and its alloy, the smart self-healing anticorrosive coating can autonomously restore the damaged part of the coating according to the environmental changes, strengthen the corrosion protection ability, and prolong its service life. This paper reviews the research progress of smart self-healing coatings on Mg alloys. These coatings mostly contain suitable corrosion inhibitors encapsulated into micro/nano containers. Moreover, the different self-healing mechanisms and functionalities of micro/nano containers are discussed. The micro/nano containers range from inorganic nanocontainers such as mesoporous nanoparticles (silica (SiO2), titanium dioxide (TiO2), etc.), over inorganic clays (halloysite, hydrotalcite-like, zeolite), to organic nanocontainers such as polymer microcapsules, nanofibers, chitosan (CS) and cyclodextrin (CD), as well as, carbon materials such as graphene and carbon nanotubes and hybrids such as metal organic frameworks. The functioning of micro/nano containers can be divided in two principal groups: autonomous (based on defect filling and corrosion inhibition) and non-autonomous (based on dynamic bonds and shape memory polymers). Moreover, multi functionalities and composite applications of various micro/nano containers are summarized. At present, significant progress has been made in the preparation methods and technologies of micro/nano containers. Achieving long-term self-healing properties of coatings sensing of coating failure and early warning after self-healing function failure can be expected as the main development direction of self-healing corrosion protection coatings in the future.

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

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