Skip to main content
SpringerLink
Log in

The electrochemical corrosion behavior of sealed Ni–TiO2 composite coating for sintered NdFeB magnet

  • Original Paper
  • Published:
Journal of Applied Electrochemistry Aims and scope Submit manuscript

Abstract

In this article, a protective sealed Ni–TiO2 composite coating (SCC) was prepared on sintered NdFeB magnet by pulse current electrodeposition and sol–gel combined technique. For a comparison, unsealed Ni–TiO2 composite coating (UCC) was also studied. The surface morphologies of composite coating were studied using scanning electron microscope (SEM). The structure of sealing layer was studied by Fourier transform infrared (FT-IR) spectrum. The anticorrosive properties of composite coating in neutral 3.5 wt% NaCl solution were evaluated by potentiodynamic polarization measurements and electrochemical impedance spectroscopy (EIS). In order to further investigate the anticorrosive properties of SCC, a long-term immersion test was carried out in neutral 3.5 wt% NaCl solution. The results of corrosion tests showed that due to the blocking effect of sealing layer, SCC can suppress the corrosion process by holding back the transfer or diffusion of corrosive medium, and therefore showed the excellent anticorrosive properties for sintered NdFeB magnet.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

  1. Matsuura Y (2006) J Magn Magn Mater 303:344

    Article  CAS  Google Scholar 

  2. Bai G, Gao RW, Sun Y, Han GB, Wang B (2007) J Magn Magn Mater 308:20

    Article  CAS  Google Scholar 

  3. Vial F, Joly F, Nevalainen E, Sagawa M, Hiraga K, Park KT (2002) J Magn Magn Mater 242–245:1329

    Article  Google Scholar 

  4. Cygan DF, McNallanm MJ (1995) J Magn Magn Mater 139:131

    Article  CAS  Google Scholar 

  5. Rada M, Gebert A, Mazilu I, Khlopkov K, Gutfleisch O, Schultz L, Rodewald W (2006) J Alloys Compd 415:111

    Article  CAS  Google Scholar 

  6. Tamborim Takeuchi SM, Azambuja DS, Saliba-Silva AM, Costa I (2006) Surf Coat Technol 200:6826

    Article  CAS  Google Scholar 

  7. Yu LQ, Wen YH, Yan M (2004) J Magn Magn Mater 283:353

    Article  CAS  Google Scholar 

  8. Walton A, Speight JD, Williams AJ, Harris IR (2000) J Alloys Compd 306:253

    Article  CAS  Google Scholar 

  9. El-Moneim AA, Gebert A, Uhlemann M, Gutfleisch O, Schultz L (2002) Corros Sci 44:1857

    Article  CAS  Google Scholar 

  10. Saliba-Silva A, Faria RN, Baker MA, Costa I (2004) Surf Coat Technol 185:321

    Article  CAS  Google Scholar 

  11. Tamborim Takeuchi SM, Azambuja DS, Costa I (2006) Surf Coat Technol 201:3670

    Article  Google Scholar 

  12. Man HH, Man HC, Leung LK (1996) J Magn Magn Mater 152:40

    Article  CAS  Google Scholar 

  13. Cheng CW, Cheng FT (1998) J Appl Phys 83:6417

    Article  CAS  Google Scholar 

  14. Hu JM, Liu XL, Zhang JQ, Cao CN (2006) Prog Org Coat 55:388

    Article  CAS  Google Scholar 

  15. Song L, Wang Y, Lin W, Liu Q (2008) Surf Coat Technol 202:5146

    Article  CAS  Google Scholar 

  16. Ma CB, Gao FH, Zhang Z, Zhang JQ (2006) Appl Surf Sci 253:2251

    Article  CAS  Google Scholar 

  17. Low CTJ, Wills RGA, Walsh FC (2006) Surf Coat Technol 201:371

    Article  CAS  Google Scholar 

  18. Szczygiel B, Kolodziej M (2005) Electrochim Acta 50:4188

    Article  CAS  Google Scholar 

  19. Nowak P, Socha RP, Kaisheva M, Fransaer J, Celis JP, Stoinov Z (2000) J Appl Electrochem 30:429

    Article  CAS  Google Scholar 

  20. Lin CS, Huang KC (2004) J Appl Electrochem 34:1013

    Article  CAS  Google Scholar 

  21. Hu F, Chan KC (2004) Appl Surf Sci 233:163

    Article  CAS  Google Scholar 

  22. Hou F, Wang W, Guo H (2006) Appl Surf Sci 252:3812

    Article  CAS  Google Scholar 

  23. Li J, Sun Y, Sun X, Qiao J (2005) Surf Coat Technol 192:331

    Article  CAS  Google Scholar 

  24. Wang W, Hou F, Wang H, Guo H (2005) Scripta Mater 53:613

    Article  CAS  Google Scholar 

  25. Gyftou P, Pavlatou EA, Spyrellis N (2008) Appl Surf Sci 254:5910

    Article  CAS  Google Scholar 

  26. Chen L, Wang L, Zeng Z, Xu T (2006) Surf Coat Technol 201:599

    Article  CAS  Google Scholar 

  27. Gurunathan K, Amalnerkar DP, Trivedi DC (2003) Mater Lett 57:1642

    Article  CAS  Google Scholar 

  28. Bertelsen CM, Boerio FJ (2001) Prog Org Coat 41:239

    Article  CAS  Google Scholar 

  29. Zhu D, Van Ooij W (2003) Cor Sci 45:2177

    Article  CAS  Google Scholar 

  30. Zheludkevicha ML, Serra R, Montemor MF, Miranda Salvadoa IM, Ferreira MGS (2006) Surf Coat Technol 200:3084

    Article  Google Scholar 

  31. Cabral A, Duarte RG, Montemor MF, Zheludkevich ML, Ferreira MGS (2005) Cor Sci 47:869

    Article  CAS  Google Scholar 

  32. Ferreira MGS, Duarte RG, Montemor MF, Simões AMP (2004) Electrochim Acta 49:2927

    Article  CAS  Google Scholar 

  33. Shang W, Chen B, Shi X, Chen Y, Xiao X (2009) J Alloys Compd 474:541

    Article  CAS  Google Scholar 

  34. Tana ALK, Soutar AM, Annergrena IF, Liub YN (2005) Surf Coat Technol 198:478

    Article  Google Scholar 

Download references

Acknowledgments

The authors acknowledge with thanks the financial supports granted by the Natural Science Foundation of Chongqing, China (CSTC. 2005BB4055), and the High-Tech Cultivation Program of Southwest Normal University (No. XSGX06).

Author information

Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Southwest University, 400715, Chongqing, People’s Republic of China

    Qing Li, Jun-ying Hu, Xian-kang Zhong & Shi-yan Zhang

  2. School of Materials Science and Engineering, Southwest University, 400715, Chongqing, People’s Republic of China

    Xiao-kui Yang

Authors
  1. Xiao-kui Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Qing Li
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jun-ying Hu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Xian-kang Zhong
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Shi-yan Zhang
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Qing Li.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Yang, Xk., Li, Q., Hu, Jy. et al. The electrochemical corrosion behavior of sealed Ni–TiO2 composite coating for sintered NdFeB magnet. J Appl Electrochem 40, 39–47 (2010). https://doi.org/10.1007/s10800-009-9961-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10800-009-9961-8

Keywords

Search

Navigation