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Nano Research 2023, 16(2): 3312-3319 https://doi.org/10.1007/s12274-022-4937-7
Research Article | Issue | Published: 17 October 2022

Bio-inspired superhydrophobic magnesium alloy surfaces with active anti-corrosion and self-healing properties

Show Author's Information Qiang Li1,  Xudong Zhang1,  Shuang Ben1,  Zhihong Zhao1,  Yuzhen Ning2( ),  Kesong Liu1( ),  Lei Jiang1
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of Chemistry, Beihang University, Beijing 100191, China
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
Keywords:
superhydrophobic, self-healing, magnesium alloys, anti-corrosion coating, active anti-corrosion property
Topics:
Coatings
Cite this article:
Li Q, Zhang X, Ben S, et al. Bio-inspired superhydrophobic magnesium alloy surfaces with active anti-corrosion and self-healing properties. Nano Research, 2023, 16(2): 3312-3319. https://doi.org/10.1007/s12274-022-4937-7
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Abstract Full text Electronic supplementary material About this article

Bio-inspired superhydrophobic magnesium (Mg) alloy surfaces are of increasing interest in corrosion protection due to superior barrier and shielding effects. However, superhydrophobic (SHB) anti-corrosion surfaces are susceptible to damage, which limit their extensive applications. To this end, a micro/nano structure-functional molecule SHB composite coating with self-healing and active anti-corrosion dual-function properties was designed on Mg alloys substrate. The dual-function SHB composite anti-corrosion coating based on lauric acid (La) intercalated and modified hydrotalcite (La-LDH) consisted of three-layer structure, namely La-LDH powder/polydimethylsiloxane (PDMS)/La-LDH film. The anti-corrosion performance of as-prepared coatings was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results indicate that the SHB coating shows excellent active corrosion resistance. Moreover, we also examined the self-healing and anti-corrosion properties of SHB coating upon physical damage and explained the healing mechanism. After heat treatment, the damaged SHB coating regain its surface microstructure and corrosion protection property. This work expands new insights for the wide application of Mg alloys and the research in the field of metal protection.


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Electronic supplementary material
About this article

Bio-inspired superhydrophobic magnesium alloy surfaces with active anti-corrosion and self-healing properties

Show Author's information Qiang Li1, Xudong Zhang1, Shuang Ben1, Zhihong Zhao1, Yuzhen Ning2( ), Kesong Liu1( ), Lei Jiang1
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of Chemistry, Beihang University, Beijing 100191, China
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China

Abstract

Bio-inspired superhydrophobic magnesium (Mg) alloy surfaces are of increasing interest in corrosion protection due to superior barrier and shielding effects. However, superhydrophobic (SHB) anti-corrosion surfaces are susceptible to damage, which limit their extensive applications. To this end, a micro/nano structure-functional molecule SHB composite coating with self-healing and active anti-corrosion dual-function properties was designed on Mg alloys substrate. The dual-function SHB composite anti-corrosion coating based on lauric acid (La) intercalated and modified hydrotalcite (La-LDH) consisted of three-layer structure, namely La-LDH powder/polydimethylsiloxane (PDMS)/La-LDH film. The anti-corrosion performance of as-prepared coatings was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results indicate that the SHB coating shows excellent active corrosion resistance. Moreover, we also examined the self-healing and anti-corrosion properties of SHB coating upon physical damage and explained the healing mechanism. After heat treatment, the damaged SHB coating regain its surface microstructure and corrosion protection property. This work expands new insights for the wide application of Mg alloys and the research in the field of metal protection.

Keywords: superhydrophobic, self-healing, magnesium alloys, anti-corrosion coating, active anti-corrosion property

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Publication history
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Acknowledgements

Publication history

Received: 01 July 2022
Revised: 08 August 2022
Accepted: 18 August 2022
Published: 17 October 2022
Issue date: February 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the Fundamental Research Fund (No. 2020-JCJQ-JJ-008), the National Natural Science Foundation of China (No. 21871020), and the Postdoctoral Research Foundation of China (Nos. 2021TQ0023, 2020M680296, 2022T150035 and 2022TQ0022).

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