| JIANG Wei,YANG Lingyi,ZHENG Qingqian,DONG Jiling,ZHONG Chenchen.Research Progress on Enhancing Corrosion Resistance ofOrganic Polymeric Coatings by MOFs[J],54(2):38-51 |
| Research Progress on Enhancing Corrosion Resistance ofOrganic Polymeric Coatings by MOFs |
| Received:April 03, 2024 Revised:July 03, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2025.02.003 |
| KeyWord:MOFs organic coating anti-corrosion filler intelligent anti-corrosion collaborative anti-corrosion corrosion inhibitor load |
| Author | Institution |
| JIANG Wei |
School of Chemistry and Chemical Engineering,Chongqing , China |
| YANG Lingyi |
School of Metallurgy and Power Engineering, ChongqingUniversity of Science and Technology, Chongqing , China |
| ZHENG Qingqian |
School of Metallurgy and Power Engineering, ChongqingUniversity of Science and Technology, Chongqing , China |
| DONG Jiling |
School of Chemistry and Chemical Engineering,Chongqing , China;School of Metallurgy and Power Engineering, ChongqingUniversity of Science and Technology, Chongqing , China |
| ZHONG Chenchen |
School of Chemistry and Chemical Engineering,Chongqing , China |
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| Abstract: |
| Organic coatings are commonly acknowledged within the realm of metal corrosion protection for their superior adhesion to metals, exceptional barrier properties, electrical insulation capabilities, and cost-effectiveness. However, the failure of organic coating protection can be ascribed to both internal defects and external damage. Traditional fillers and single corrosion inhibitors still face challenges in enhancing the corrosion protection of coatings. In recent years, metal-organic frameworks (MOFs) have become a new type of material to enhance the corrosion resistance of organic coatings by virtue of their stability, good compatibility with coatings, and smart release. This paper reviews the benefits of incorporating MOFs in enhancing the corrosion resistance of organic coatings, focusing on the mechanism of MOFs and the current research status in terms of enhancing the passive corrosion resistance of coatings and providing self-healing and active corrosion resistance. In these two aspects, the key role played by MOFs is briefly summarized in enhancing the corrosion resistance of coatings through molecular modification and compounding of other materials. Furthermore, the synergistic anti-corrosion mechanism of MOFs with other molecular compounds is discussed. Additionally, selection and loading strategies of MOFs on corrosion inhibitors in smart anti-corrosion coatings are summarized, along with the associated challenges. In terms of enhancing the passive corrosion resistance of coatings, the active sites contained in the MOFs in coatings participate in the cross-linking curing reaction of coatings in the form of Lewis acids and Lewis bases, and the pore configurations within the MOFs provide a suitable contact space for the curing reaction of the coating molecules, which increases the cross-linking density of coatings. In addition, certain MOFs act as a stable filler to fill the pores of coatings to address the inherent defects of coatings. It is used to reduce the porosity of coatings, and finally improve the barrier property of coatings to corrosive ions. In terms of strengthening the active anti-corrosion performance of coatings, the utilization of MOFs to stimulate response characteristics and load corrosion inhibitors in a targeted corrosion environment enables structural modifications and controlled release of inhibitors, so as to achieve the purpose of intelligent release of corrosion inhibitors, and promote the self-repair of damaged coatings. MOFs intelligent coating corrosion inhibitors can be derived within the MOFs themselves and the loading of exogenous corrosion inhibitors. Here, the protection mechanism of different types of corrosion inhibitors for metals is summarized. And some MOFs materials with corrosion inhibition properties, their corrosion inhibition components and response mechanisms are listed. Moreover, the loading methods of exogenous corrosion inhibitors are reviewed, including in-situ loading and loading of corrosion inhibitors after the synthesis of MOFs. Also, the advantages and shortcomings of the loading strategies of various corrosion inhibitors are explored. Finally, the potentials and shortcomings of MOFs in improving the corrosion resistance of organic coatings are discussed, and certain insights are provided for MOFs in improving the corrosion resistance of organic coatings in terms of environmental protection, anti-corrosion mechanism, and predicted corrosion resistance, in the hope of providing certain reference values for the use of MOFs in enhancing the corrosion resistance of organic coatings. |
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