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A polyurethane coating using CoMOF-BTA metal-organic framework for active protection of AA2024-T3

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Abstract

CoMOF-BTA, a new metal-organic framework with inherent corrosion inhibition ability was prepared via a one-step solvothermal process and characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermal analyses. Immersion and polarization tests were conducted to evaluate the ability of CoMOF-BTA to resist corrosion on AA2024-T3 alloy in NaCl solution. In addition, CoMOF-BTA particles were incorporated into polyurethane coatings to produce active anti-corrosion coatings, whose corrosion protection capabilities were assessed using electrochemical methods and salt spray analysis. The impedance results show that polyurethane coatings containing CoMOF-BTA have coating resistances (Rcoat) that are around two orders of magnitude higher than that without the CoMOF-BTA particles. The salt spray analysis also indicates the corrosion protection ability of coatings containing CoMOF-BTA particles after a long period of exposure. The results demonstrate that CoMOF-BTA improved the ability of AA2024-T3 to resist corrosion and confirm the anti-corrosion properties of CoMOF-BTA-laden coatings by the controlled release of BTA molecules in NaCl solution. This study offers a new anti-corrosion MOF material and active coating for the protection of aluminum alloys against corrosion.

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The raw/processed data required to reproduce these findings is not available at this time as the data also form part of an ongoing study.

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Funding

The National Natural Science Foundation of China (52171089 and 51571202) and the LingChuang Research Project of China National Nuclear Corporation (E041F212Z1) supported this work.

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Authors and Affiliations

  1. CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    Izuchukwu K. Nwokolo, Hongwei Shi, Wanyu Zhang, Fuchun Liu & En-Hou Han

  2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China

    Izuchukwu K. Nwokolo, Hongwei Shi, Wanyu Zhang, Fuchun Liu & En-Hou Han

  3. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China

    Hongwei Shi

  4. Materials Chemistry Research Group, Department of Pure and Applied Chemistry, University of Calabar, Calabar, 540242, Nigeria

    Alexander I. Ikeuba

  5. Institute of Corrosion Science and Technology, Guangzhou, 510530, China

    Fuchun Liu & En-Hou Han

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Nwokolo, I.K., Shi, H., Ikeuba, A.I. et al. A polyurethane coating using CoMOF-BTA metal-organic framework for active protection of AA2024-T3. J Coat Technol Res 21, 521–535 (2024). https://doi.org/10.1007/s11998-023-00835-x

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