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The Preparation and Properties of ZnAl Coating for Ring-Shaped Bonded NdFeB Magnet with High Corrosion Resistance

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Abstract

The ZnAl coating was prepared on ring-shaped bonded NdFeB magnets (RSM) via air spraying method with silane as adhesive and flake-like Zn and Al powder as raw materials. The morphology, composition structure and element distribution of the ZnAl coating were characterized by scan electron microscopy with energy-dispersive spectroscopy and x-ray diffraction. The corrosion resistance of the ZnAl coating was analyzed by means of potentiodynamic polarization curve and neutral salt spray test (NSS). The variation in magnetic flux for RSM and ZnAl/RSM was also measured. It was found out that the Zn and Al appeared as metal elements in the coating and superimposed as sheets on the RSM and the ZnAl coating was deposited uniformly and densely with thickness of 16.7 μm. The corrosion current density of ZnAl/RSM was an order of magnitude lower than that of bare RSM and the NSS time attained to 264 h (red rust), indicating the better anticorrosion performance of the ZnAl coating. The magnetic flux of RSM was reduced by 0.15-0.55% after coated with ZnAl, indicating that the coating has little effect on the magnetic property of the RSM.

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References

  1. J.J. Croat, J.F. Herbst, R.W. Lee and F.E. Pinkerton, High-Energy Product Nd-Fe-B Permanent Magnets, Appl. Phys. Lett, 1984, 44(1), p 148–149.

    Article  CAS  Google Scholar 

  2. H.J. Kim, C.S. Koh and P.S. Shin, A New Anisotropic Bonded NdFeB Permanent Magnet and its Application to a Small DC Motor, IEEE Trans. Magn., 2010, 46(6), p 2314–2317.

    Article  CAS  Google Scholar 

  3. W.Q. Liu, R.J. Hu, M. Yue, Y.X. Yin and D.T. Zhang, Preparation and Properties of Isotropic Nd-Fe-B Bonded Magnets with Sodium Silicate Binder, J. Magn. Magn. Mater., 2017, 435, p 187–193.

    Article  CAS  Google Scholar 

  4. E. Maria Palmero, D. Casaleiz, N. Alejandra Jimenez, J. Rial and J. de Vicente, Magnetic-Polymer Composites for Bonding and 3D Printing of Permanent Magnets, IEEE Trans. Magn., 2019, 55(2), p 2101004.

    Google Scholar 

  5. Y.W. Song, H. Zhang, H.X. Yang and Z.L. Song, A Comparative Study on the Corrosion Behavior of NdFeB Magnets in Different Electrolyte Solutions, Mater. Corros., 2018, 59(10), p 794–801.

    Article  Google Scholar 

  6. L.Q. Yu, Y.H. Wen and M. Yan, Effects of Dy and Nb on the Magnetic Properties and Corrosion Resistance of Sintered NdFeB, J. Magn. Magn. Mater., 2004, 283, p 353–356.

    Article  CAS  Google Scholar 

  7. A.A. El-Moneim, A. Gebert, M. Uhlemann, O. Gutfleisch and L. Schultz, The Influence of Co and Ga Additions on the Corrosion Behavior of Nanocrystalline NdFeB Magnets, Corros. Sci., 2002, 44(8), p 1857–1874.

    Article  CAS  Google Scholar 

  8. S.C. Wang, W.P. Li, D.X. Han, H.C. Liu and L.Q. Zhu, Preparation and Application of a Waterborne Acrylic Copolymer-Siloxane Composite: Improvement on the Corrosion Resistance of Zinc-Coated NdFeB Magnets, RSC Adv., 2015, 5(99), p 81759–81767.

    Article  CAS  Google Scholar 

  9. W. Jiang, L. Shen, M.B. Qiu, X. Wang, M.Z. Fan and Z.J. Tian, Preparation of Ni-SiC Composite Coatings by Magnetic Field-Enhanced Jet Electrodeposition, J. Alloy. Compd., 2018, 762, p 115–124.

    Article  CAS  Google Scholar 

  10. Y.Y. Cheng, X.L. Pang, K.W. Gao, H.S. Yang and A.A. Volinsky, Corrosion Resistance and Friction of Sintered NdFeB Coated with Ti/TiN Multilayers, Thin Solid Films, 2014, 550, p 428–434.

    Article  CAS  Google Scholar 

  11. J.L. Xu, Z.X. Huang, J.M. Luo and Z.C. Zhong, Effect of Titania Particles on the Microstructure and Properties of the Epoxy Resin Coatings on Sintered NdFeB Permanent Magnets, J. Magn. Magn. Mater, 2014, 355, p 31–36.

    Article  CAS  Google Scholar 

  12. K.Y. Xiao, H. Xu, Z.W. Guo and W. Zheng, Research of the Surface Treatment Process of Bonded NdFeB Magnet with Composite Powder Electrostatic Spraying, Solid State Phenom., 2018, 278, p 63–71.

    Article  Google Scholar 

  13. P.J. Zhang, M.G. Zhu, W. Li, G.Q. Xu, X.L. Huang, X.F. Yi, J.G. Chen and Y.C. Wu, Study on Preparation and Properties of CeO2/Epoxy Resin Composite Coating on Sintered NdFeB Magnet, J. Rare Earths, 2018, 36(5), p 544–551.

    Article  CAS  Google Scholar 

  14. L. Jiang, Z. Jin, F. Xu, Y. Yu, G. Wei, H. Ge, Z. Zhang and C. Cao, Effect of Potential on Aluminium Early-Stage Electrodeposition Onto NdFeB Magnet, Surf. Eng., 2017, 33(5), p 375–382.

    Article  CAS  Google Scholar 

  15. J.Z. Ma, X.F. Liu, W.T. Qu and C.G. Zhou, Corrosion Behavior of Detonation Gun Sprayed Al Coating on Sintered NFeB, J. Therm. Spray Technol., 2015, 24(3), p 394–400.

    Article  CAS  Google Scholar 

  16. Y.Q. Huang, H.Q. Li, M. Zuo, L. Tao, W. Wang, J. Zhang, Q. Tang and P.W. Bai, Corrosion Resistance of Sintered NdFeB Coated with SiC/Al Bilayer Thin Films by Magnetron Sputtering, J. Magn. Magn. Mater., 2016, 409, p 39–44.

    Article  CAS  Google Scholar 

  17. H. Zhang, Y.W. Song and Z.L. Song, Electrodeposited Nickel/Alumina Composite Coating on NdFeB Permanent Magnets, Mater. Corros., 2008, 59(4), p 324–328.

    Article  CAS  Google Scholar 

  18. F. Liu, Q. Li, X.K. Yang, Y. Dai, F. Luo, S.Y. Wang and H.X. Zhang, Corrosion Resistance of Environment-Friendly Sealing Layer for Zn-Coated Sintered NdFeB Magnet, Mater. Corros., 2011, 62(12), p 1141–1148.

    Article  CAS  Google Scholar 

  19. J.J. Ding, B.J. Xu and G.P. Ling, Al-Mn Coating Electrodeposited From Ionic Liquid on NdFeB Magnet with High Hardness and Corrosion Resistance, Appl. Surf. Sci., 2014, 305, p 309–313.

    Article  CAS  Google Scholar 

  20. J. Chen, H. Yang, G. Xu, P. Zhang, J. Lv, W. Sun, B. Li, J. Huang, D. Wang and Y. Wu, Phosphating Passivation of Vacuum Evaporated Al/NdFeB Magnets Boosting High Anti-Corrosion Performances, Surf. Coat. Technol., 2020, 399, p 126115.

    Article  CAS  Google Scholar 

  21. I. Rampin, F. Bisaglia and M. Dabala, Corrosion Properties of NdFeB Magnets Coated by a Ni/Cu/Ni Layer in Chloride and Sulfide Environments, J. Mater. Eng. Perform, 2010, 19(7), p 970–975.

    Article  CAS  Google Scholar 

  22. L. Shen, Y.H. Wang, W. Jiang, X. Liu, C. Wang and Z.J. Tian, Jet Electrodeposition Multilayer Nickel on the Surface of Sintered NdFeB and Corrosion Behaviours, Corros. Eng. Sci. Technol, 2017, 52(4), p 311–316.

    Article  CAS  Google Scholar 

  23. P.J. Zhang, J.Q. Liu, G.Q. Xu, X.F. Yi, J.G. Chen and Y.C. Wu, Anticorrosive Property of Al Coatings on Sintered NdFeB Substrates via Plasma Assisted Physical Vapor Deposition Method, Surf. Coat. Technol., 2015, 282, p 86–93.

    Article  CAS  Google Scholar 

  24. Y.Y. Zhang, D.J. Zheng, G.L. Song, L.H. Han and D.H. Fu, Effect of Vacuum Degree on Adhesion Strength and Corrosion Resistance of Magnetron Sputtered Aluminum Coating on NdFeB Magnet, Mater. Corros., 2019, 70(7), p 1230–1241.

    Article  CAS  Google Scholar 

  25. J.L. Li, S.D. Mao, K.F. Sun, X.M. Li and Z.L. Song, AlN/Al Dual Protective Coatings on NdFeB by DC sMagnetron Sputtering, J. Magn. Magn. Mater., 2009, 321(22), p 3799–3803.

    Article  CAS  Google Scholar 

  26. Lasek S, Kursa M, Konecna K, Tanger L (2011) Composition, Structure and Some Corrosion Properties Of As-Recycled NdFeB Magnetic Material and Protective ZnAl Coating. In: Metal 2011 20th Anniversary international conference on metallurgy and materials, pp. 1072-1077

  27. Q.Y. Zhou, R.J. Chen and S. Guo, Preparation of Highly Corrosion-Resistant ZnAl Coating on NdFeB Magnet and Study on its Properties, Electroplat. Finish., 2020, 39, p 165–170.

    Google Scholar 

  28. Y.W. Yang, R.D. Ren, Y.L. Wang, L.Z. Fang, Y.F. Chen, Q.G. Gao, L. Yang, J.G. Liu, X.G. Fang and B.K. Dong, Effect of Molding Pressure on Structure and Properties of Ring-Shaped Bonded NdFeB Magnet, IEEE Trans. Magn., 2020, 56(12), p 1000.

    Article  Google Scholar 

  29. A.P. Yadav, H. Katayama, K. Noda, H. Masuda, A. Nishikata and T. Tsuru, Effect of Al on the Galvanic Ability of Zn-Al Coating Under Thin Layer of Electrolyte, Electrochim. Acta, 2007, 52(7), p 2411–2422.

    Article  CAS  Google Scholar 

  30. H.Y. Gao, J. Tan, C. Ju, S.J. Chu, J. Wang and B.D. Sun, Effect of Rare Earth Metals on Microstructure and Corrosion Resistance of Zn-0.18Al Coatings, Mater. Sci. Technol., 2011, 27(1), p 71–75.

    Article  CAS  Google Scholar 

  31. J.L. Xu, Z.C. Zhong, Z.X. Huang and J.M. Luo, Corrosion Resistance of the Titania Particles Enhanced Acrylic Resin Composite Coatings on Sintered NdFeB Permanent Magnets, J. Alloy. Compd, 2013, 570, p 28–33.

    Article  CAS  Google Scholar 

  32. Z.Y. Cao, X.F. Ding, R. Bagheri, A.G. Wattoo, C. Xu, L.J. Yang, L.X. Song, Y.Q. Wen and L. Song, The Deposition, Microstructure and Properties of Al Protective Coatings for NdFeB Magnets by Multi-Arc Ion Plating, Vacuumb, 2017, 142, p 37–44.

    Article  CAS  Google Scholar 

  33. J. Chen, H. Yang, G. Xu, P. Zhang, J. Lv, W. Sun, B. Li, J. Huang, D. Wang, X. Shu and Y. Wu, Rare Earth Passivation and Corrosion Resistance of Zinc Coated NdFeB Magnets, J. Rare Earths, 2020 https://doi.org/10.1016/j.jre.2020.11.012

    Article  Google Scholar 

  34. P.J. Zhang, S.J. Deng, W. Sun, G.Q. Xu and B.S. Li, Technology and Corrosion Resistance of Electrodeposited Zn-Co Alloy Coatings on Sintered NdFeB Magnets, Metall. Funct. Mater., 2020, 27(04), p 22–29.

    CAS  Google Scholar 

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Acknowledgments

This work was supported by Major R & D projects of Hefei key technologies (J2020G20), the Anhui Province 2020 Quality Engineering Project of Higher Education Institutions (2020jyxm1514) and Key Research and Development Program of Anhui Province (202104a05020001).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, Anhui Province, People’s Republic of China

    Youwen Yang, Yongle Wang, Lei Yang, Ruidong Ren, Yufan Chen, Buke Dong, Jiguang Liu & Xiaogang Fang

  2. Engineering Research Center of High-Performance Copper Alloy Material and Forming, Ministry of Education, Hefei University of Technology, Hefei, 230009, Anhui Province, People’s Republic of China

    Youwen Yang, Jiguang Liu & Xiaogang Fang

  3. Magnequench Magnetic Materials (Chuzhou) Co., Ltd., Chuzhou, 239000, Anhui Province, People’s Republic of China

    Yufan Chen & Qinguo Gao

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  1. Youwen Yang
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Yang, Y., Wang, Y., Yang, L. et al. The Preparation and Properties of ZnAl Coating for Ring-Shaped Bonded NdFeB Magnet with High Corrosion Resistance. J. of Materi Eng and Perform 31, 1003–1008 (2022). https://doi.org/10.1007/s11665-021-06259-1

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