Application of two-dimensional nanomaterial/epoxy composite coating in corrosion protection
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摘要: 二维纳米材料具有片层结构、致密的六方晶格、大的比表面积和优异的热化学稳定性等特点，是作为防腐涂层填料的最佳选择。本论文综述了二维纳米材料在腐蚀防护复合涂层领域的应用。首先介绍了二维纳米材料在环氧树脂防腐涂料的屏障保护作用、抑制保护作用和牺牲保护作用，然后阐述了常见二维纳米材料在环氧树脂防腐涂料中的应用途径和方式。此外，本论文还总结了二维纳米材料在防腐涂料应用中存在的分散、取向以及与金属基体的附着力等问题及其解决办法。最后，对二维纳米材料在环氧树脂防腐涂料中的应用进行了总结和展望。Abstract: Two-dimensional nanomaterials are the best choice for anticorrosive coatings because of their lamellar structure, dense hexagonal lattice, large specific surface area and excellent thermochemical stability. In this paper, the applications of two-dimensional nanomaterials in corrosion protection composite coatings are reviewed. The barrier protection, inhibition protection and sacrifice protection of two-dimensional nanomaterials in epoxy resin anticorrosive coatings are introduced firstly, and then the application ways and methods of common two-dimensional nanomaterials in epoxy resin anticorrosive coatings are expounded. In addition, the problems of dispersion, orientation and adhesion to metal substrate in the application of two-dimensional nanomaterials in anticorrosive coatings and their solutions are also summarized. Finally, the application of two-dimensional nanomaterials in epoxy anticorrosive coatings is summarized and prospected.
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Key words:
- two-dimensional nanomaterials /
- epoxy resin /
- corrosion protection /
- steel matrix /
- coating
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图 2 石墨烯/水性环氧含锌涂层防腐机制示意图: (a) 复合涂层物理屏蔽作用; (b) 石墨烯片的阻隔作用; (c) 锌颗粒的阴极保护作用; (d) 腐蚀锌颗粒[28]
Figure 2. Schematic diagram of anti-corrosion mechanism of graphene/waterborne epoxy zinc-containing coating: (a) Physical shielding effect of composite coating; (b) Barrier effect of graphene sheets; (c) Cathodic protection of zinc particles; (d) Corrosive zinc particles[28]
表 1 二维层状材料在涂层中的防腐效果
Table 1. Anticorrosion effect of two-dimensional layered materials in coatings
Two-dimensional
nanomaterial/Epoxy
anticorrosive coatingCorrosion
environmentMass
fraction ω/wt%Preservative effect Key character Ref. Graphene/Epoxy 3.5wt%NaCl 0.5 Icorr：2.617×10−8 A·cm−2
Ecorr：−0.094 VGood adhesion and excellent corrosion resistance [24] Graphene oxide/Epoxy 3.5wt%NaCl 0.5 Icorr：3.061×10−7 A·cm−2
Ecorr：−0.690 VLow viscosity and good adhesion with steel surface [25] Fluorographene/Epoxy 3.5wt%NaCl 0.5 Icorr：6.199×10−7 A·cm−2
Ecorr：−0.696 VHigh hydrophobicity and good impermeability [26] Hexagonal boron nitride/Epoxy 3.5wt%NaCl 0.5 Icorr：4.960×10−8 A·cm−2
Ecorr：−0.608 VHigh thermal stability and excellent corrosion resistance [17] Molybdenum disulfide/Epoxy resin 3.5wt%NaCl 0.5 Icorr：7.474×10−9 A·cm−2
Ecorr：−0.0928 VGood physical shielding performance and long-term
stable corrosion resistance[42] Notes: Icorr—Corrosion current density; Ecorr—Corrosion potential. 
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