Bio-inspired Poly(sodium thioctate)-gated Core-Shell Metal-Organic Frameworks Nanocontainers Reinforced Epoxy Coating for Corrosion Protection of Magnesium Alloy

Zhi-Hui Xie; Pei-Chun Tang; Dan Xu; Yue-Jun Ouyang; Xiao-Qiang Fan; Jun-Lei Tang; Maadh Hasan Alwan; Ali Hussein Khalaf; Saba Abdulhussein A. Al-Najafi; Qi-Wen Yong

doi:10.1007/s10118-026-3796-1

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Bio-inspired Poly(sodium thioctate)-gated Core-Shell Metal-Organic Frameworks Nanocontainers Reinforced Epoxy Coating for Corrosion Protection of Magnesium Alloy

RESEARCH ARTICLE | Updated：2026-08-28

- Bio-inspired Poly(sodium thioctate)-gated Core-Shell Metal-Organic Frameworks Nanocontainers Reinforced Epoxy Coating for Corrosion Protection of Magnesium Alloy
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-15(2026)
- Affiliations：
  
  a.Institute of Applied Chemistry, Precise Synthesis and Function Development Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637009, China
  b.Key Laboratory of the Preparation and Application of Environmentally Friendly Functional Materials (Huaihua University), College of Hunan Province/Hunan Engineering Research Center for Recycled Aluminum, Huaihua University, Huaihua 418000, China
  c.Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
  d.SILKROAD Research Center of Sustainable Energy Conversion and Utilization & College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
  e.North Oil Refinery Company, Baiji, Salah Al-Din 34007, Iraq
  f.SILKROAD Research Center of Sustainable Energy Conversion and Utilization, Southwest Petroleum University & Iraq's Ministry of Oil, 10085 Baghdad, Governorate, Iraq
  g.Middle Technical University & Heavy Engineering Equipment State Company, Ministry of Oil, Baghdad 10001, Iraq
- Author bio：
  
  fxq@home.swjtu.edu.cn (X.Q.F.)
  yongqiwen13@mails.ucas.ac.cn (Q.W.Y.)
- Funds：
- DOI：10.1007/s10118-026-3796-1
  CLC：
- Received：31 May 2026，
  
  Accepted：26 June 2026，
  
  Online First：28 August 2026，
  
  Published：2026-07
- Accepted：
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Xie, Z. H.; Tang, P. C.; Xu, D.; Ouyang, Y. J.; Fan, X. Q.; Tang, J. L.; Alwan, M. H.; Khalaf, A. H.; Al-Najafi, S. A. A.; Yong, Q. W. Bio-inspired poly(sodium thioctate)-gated core-shell metal-organic frameworks nanocontainers reinforced epoxy coating for corrosion protection of magnesium alloy. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3796-1

Zhi-Hui Xie, Pei-Chun Tang, Dan Xu, et al. Bio-inspired Poly(sodium thioctate)-gated Core-Shell Metal-Organic Frameworks Nanocontainers Reinforced Epoxy Coating for Corrosion Protection of Magnesium Alloy[J/OL]. Chinese Journal of Polymer Science, 2026, 441-15.
Xie, Z. H.; Tang, P. C.; Xu, D.; Ouyang, Y. J.; Fan, X. Q.; Tang, J. L.; Alwan, M. H.; Khalaf, A. H.; Al-Najafi, S. A. A.; Yong, Q. W. Bio-inspired poly(sodium thioctate)-gated core-shell metal-organic frameworks nanocontainers reinforced epoxy coating for corrosion protection of magnesium alloy. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3796-1 DOI：

Zhi-Hui Xie, Pei-Chun Tang, Dan Xu, et al. Bio-inspired Poly(sodium thioctate)-gated Core-Shell Metal-Organic Frameworks Nanocontainers Reinforced Epoxy Coating for Corrosion Protection of Magnesium Alloy[J/OL]. Chinese Journal of Polymer Science, 2026, 441-15. DOI： 10.1007/s10118-026-3796-1.

摘要

Abstract

Magnesium alloys suffer from severe corrosion in chloride-containing environments

which significantly restricts their structural application. In this study

a core-shell smart nanocontainer (PHIO@ZIF-8/PST

denoted as PZS) was constructed by integrating a pH-responsive metal–organic framework reservoir with an

in situ

assembled poly(sodium thioctate) (PST) functional shell

and further incorporated into an epoxy matrix to develop an intelligent anticorrosion coating. The ZIF-8 core serves as an efficient loading platform for a chelating corrosion inhibitor (PHIO) and provides pH-triggered release capability

whereas the PST shell simultaneously enhances interfacial compatibility and introduces additional chemical protection. Structural analyses confirmed the successful construction of the core-shell architecture and the preservation of crystallinity after functional modification. Electrochemical and ion-release studies demonstrated that PZS nanocontainers exhibited pronounced pH-responsive behavior

enabling accelerated inhibitor release under acidic or alkaline conditions. When incorporated into the epoxy (EP) coating

PZS significantly improved the interfacial densification

reduced the defect density

and prolonged the diffusion pathways for aggressive species. Long-term electrochemical impedance spectroscopy and salt spray tests revealed that the PZS/EP coating maintained impedance values three orders of magnitude higher than that of the pristine epoxy after 28 days of immersion

indicating outstanding corrosion resistance. The enhanced performance arises from the synergistic coupling of the physical barrier reinforcement

inhibitor chelation

and

in situ

formation of protective Mg–PST complexes at active corrosion sites. This study provides a generalizable strategy for constructing multifunctional sm

art coatings for the durable protection of lightweight metal substrates.

关键词

Keywords

references

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