Fabrication of Epoxy Composite Coatings with Micro-Nano Structure for Corrosion Resistance of Sintered NdFeB
Source abstract
Abstract
A novel micro-/nano-structured coating for corrosion resistance of sintered NdFeB was constructed based on the synergetic effect between the “bridge” structure of nanoparticles and the “labyrinth effect” of micro-/nanoflakes. Iron-titanium nanopaste (ITNP) and micro-/nanoflake silver powder (MNFS) were added into epoxy resin to prepare an epoxy micro-/nano-composite coating material, and then the prepared composite coating material was coated on sintered NdFeB permanent magnets by air spraying, obtaining an epoxy composite coating with a micro-/nanostructure. The effect of the micro-/nanomaterials on the microstructure and corrosion resistance of the composite coatings was investigated, and the mechanisms of the enhancement in corrosion resistance were proposed. The results show that when immersed in 3.5 wt.% NaCl solution for 32 days, the ranking of the capacitive time constant radius and impedance modulus of the coatings at a lower frequency (Zf = 0.01 Hz) is pure EP < EP/ITNP < EP/MNFS < EP/ITNP/MNFS, respectively, and the salt spray test time of the EP/ITNP/MNFS coating is more than 720 h, which is more than twice that of the pure EP coating.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Magnetic Properties of Alloys · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Zhejiang-California International NanoSystems Institute, Zhejiang University, Hangzhou 310058, China
ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311200, China
State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China
Funding
Key Research and Development Program of Zhejiang Province
References (37)
Show source-provided references
1. Nd–Fe–B permanent magnets fabricated by low temperature sintering process10.1016/j.jallcom.2012.10.058 ↗
2. Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient10.1002/adma.201002180 ↗
3. Recent developments in the sintering of NdFeB10.1016/S0254-0584(00)00450-8 ↗
4. Permanent-magnet materials based on the rare earth-iron-boron tetragonal compounds10.1109/TMAG.1984.1063214 ↗
5. Effect of titania particles on the microstructure and properties of the epoxy resin coatings on sintered NdFeB permanent magnets10.1016/j.jmmm.2013.11.050 ↗
6. Corrosion resistance of functionalized carbon nanotubes enhanced epoxy coatings on sintered NdFeB magnets10.1007/s11998-022-00641-x ↗
7. Organic-inorganic composite passivation and corrosion resistance of zinc coated NdFeB magnets10.1016/j.jallcom.2022.168292 ↗
8. Tuning grain boundary fine structure in Nd65Ni35-added Nd-Fe-B based magnets10.1016/j.jmmm.2018.05.075 ↗
9. Clarifying the effects of La and Ce in the grain boundary diffusion sources on sintered NdFeB magnets10.1088/2053-1591/ab3756 ↗
10. Microstructure and magnetic properties of NdFeB alloys by co-doping alnico elements10.1016/j.physleta.2019.125878 ↗
11. The influence of Co on the corrosion resistance of sintered Nd-Fe-B magnets10.1016/S0304-8853(98)00706-9 ↗
12. Corrosion resistance of T-ZnOw/PDMS-MAO composite coating on the sintered NdFeB magnet10.1016/j.jmmm.2021.168049 ↗
13. Electrodeposited nickel/alumina composite coating on NdFeB permanent magnets10.1002/maco.200804107 ↗
14. A review on fundamentals and strategy of epoxy-resin-based anticorrosive coating materials
15. Synthesis and application of epoxy resins: A review10.1016/j.jiec.2015.03.026 ↗
16. Anticorrosion properties of modified basalt powder/epoxy resin coating10.1007/s11998-022-00615-z ↗
17. Research progress in epoxy resin coated anticorrosive filler
18. Characterization of protective performance of epoxy reinforced with nanometer-sized TiO2 and SiO210.1016/j.porgcoat.2007.11.003 ↗
19. Frictional characteristics of graphene oxide-modified continuous glass fiber reinforced epoxy composite10.1016/j.compscitech.2022.109446 ↗
20. Comparison of toughening mechanisms in natural silk-reinforced composites with three epoxy resin matrices10.1016/j.compositesa.2021.106760 ↗
21. Molecular Interactions and Toughening Mechanisms in Silk Fibroin–Epoxy Resin Blend Films10.1021/acs.biomac.9b00260 ↗
22. Rising of MXenes: Novel 2D-functionalized nanomaterials as a new milestone in corrosion science—A critical review10.1016/j.cis.2022.102730 ↗
23. Luo, L.D., Ma, Q., Wang, Q.W., Ding, L.F., Gong, Z.Y., and Jiang, W.Z. (2019). Study of a Nano-SiO2 Microsphere-Modified Basalt Flake Epoxy Resin Coating. Coatings, 9.10.3390/coatings9030154 ↗
24. Layered double hydroxide (LDH) for multi-functionalized corrosion protection of metals: A review10.1016/j.jmst.2021.05.078 ↗
25. The chemistry and applications of metal-organic frameworks10.1126/science.1230444 ↗
26. Design and synthesis of covalent organic frameworks towards energy and environment fields10.1016/j.cej.2018.08.184 ↗
27. Photonics with hexagonal boron nitride10.1038/s41578-019-0124-1 ↗
28. The Rise of MXenes10.1021/acsnano.9b06394 ↗
29. A brief review of corrosion protective films and coatings based on graphene and graphene oxide10.1016/j.jallcom.2018.06.133 ↗
30. Zhang, C.L., Dai, X.Y., Wang, Y.N., Sun, G.E., Li, P.H., Qu, L.J., Sui, Y.L., and Dou, Y.L. (2019). Preparation and corrosion resistance of ETEO modified graphene oxide/epoxy resin coating. Coatings, 9.10.3390/coatings9010046 ↗
31. Synthesizing a novel fluorinated reduced graphene oxide-CeO2 hybrid nanofiller to achieve highly corrosion protection for waterborne epoxy coating10.1016/j.carbon.2021.01.135 ↗
32. Achieving high performance corrosion and wear resistant epoxy coatings via incorporation of noncovalent functionalized graphene10.1016/j.carbon.2016.12.044 ↗
33. 2D transition metal dichalcogenides10.1038/natrevmats.2017.33 ↗
34. A comprehensive review on synthesis and applications of molybdenum disulfide (MoS2) material: Past and recent developments10.1016/j.inoche.2020.108200 ↗
35. An ionic liquid-graphene oxide hybrid nanomaterial: Synthesis and anticorrosive applications10.1039/C8NR01890A ↗
36. (2022). Corrosion Tests in Artificial Atmospheres Salt Spray Tests (Standard No. ISO 9227).
37. Investigating the anti-corrosion behaviors of the waterborne epoxy composite coatings with barrier and inhibition roles on mild steel10.1016/j.porgcoat.2019.04.028 ↗