Advertisement

Journal of Materials Science

, Volume 43, Issue 9, pp 3327–3332 | Cite as

Characterization and corrosion protection properties of cerium conversion coating on Gr(f)/Al composite surface

  • Chunyu WangEmail author
  • Gaohui Wu
  • Qiang Zhang
  • Longtao Jiang
Article

Abstract

The aim of this work is to investigate corrosion protection properties of Ce conversion coating on the graphite fiber-reinforced aluminum matrix (Gr(f)/Al) composite surface by electrochemical measurements, and microstructure of the Ce conversion coating was studied by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS). It is found that the coating covers the whole surface of Gr(f)/Al composites as oxidized islands, since there are some micro-cracks on the coating. The Ce conversion coating consists of Ce-rich nano-particles, and the contact sites between particles have some porosity. The porosity is not obvious during initial deposition, however, as deposition time prolonged development apparently. Moreover, some severe cracks may appear during the drying process, since evaporation of water molecules would cause shrinkage and large stress is induced. In addition, pretreatment of surface has an effect on the formation of cracks. Ce conversion coating has the composition of Ce3+ and Ce4+. Deposition of Ce-rich coating on Gr(f)/Al composite surfaces shifts the polarization curves toward lower current density values. Electrochemical impedance spectroscopy (EIS) data show that Ce conversion coating improved corrosion resistance as compared with samples that have no coating.

Keywords

Cerium Electrochemical Impedance Spectroscopy Conversion Coating Potentiodynamic Polarization Curve Uncoated Sample 

References

  1. 1.
    Kendig MW, Davenport AJ, Isaacs HS (1993) The mechanism of corrosion inhibition by chromate conversion coatings from X-ray absorption near edge spectroscopy (XANES). Corros Sci 34:41CrossRefGoogle Scholar
  2. 2.
    Traverso P, Spiniello R, Monaco L (2002) Corrosion inhibition of Al 6061 T6/Al2O3p 10% (v/v) composite in 3.5% NaCl solution with addition of cerium (III) chloride. J Surf Interf Anal 34(1):185CrossRefGoogle Scholar
  3. 3.
    Hughes AE, Taylor RJ, Hinton BRW, Wilson L (1995) XPS and SEM characterization of hydrated cerium oxide conversion coatings. J Surf Interf Anal 23(7–8):540CrossRefGoogle Scholar
  4. 4.
    Xingwen Y, Chunnan C, Zhiming Y, Derui Z, Zhongda Y (2001) Study of double layer rare earth metal conversion coating on aluminum alloy LY12. J Corros Sci 43:1283CrossRefGoogle Scholar
  5. 5.
    Kumar Mishra A, Balasubramaniam R (2007) Corrosion inhibition of aluminum alloy AA 2014 by rare earth chlorides. J Corros Sci 49:1027CrossRefGoogle Scholar
  6. 6.
    Davó B, de Damborenea JJ (2004) Use of rare earth salts as electrochemical corrosion inhibitors for an Al–Li–Cu (8090) alloy in 3.56% NaCl. J Electrochim Acta 49:4957CrossRefGoogle Scholar
  7. 7.
    Pardo A, Merino MC, Arrabal R, Merino S, Viejo F, Carboneras M (2006) Effect of Ce surface treatments on corrosion resistance of A3xx.x/SiCp composites in salt fog. J Surf Coat Technol 200:2938CrossRefGoogle Scholar
  8. 8.
    Dabalà M, Ramous E, Magrini M (2004) Corrosion resistance of cerium-based chemical conversion coatings on AA5083 aluminium alloy. J Mater Corros 55(5):381CrossRefGoogle Scholar
  9. 9.
    Fahrenholtz WG, O’Keefe MJ, Zhou H, Grant JT (2002) Characterization of cerium-based conversion coatings for corrosion protection of aluminum alloys. J Surf Coat Technol 155:208CrossRefGoogle Scholar
  10. 10.
    Mansfeld F, Jeanjaquet SL 1986 The evaluation of corrosion protection measures for metal matrix composites. J Corros Sci 26(9):727CrossRefGoogle Scholar
  11. 11.
    Greene HJ, Mansfeld F (1997) Corrosion protection of aluminum-matrix composites. Corros 53(12):920CrossRefGoogle Scholar
  12. 12.
    Wendt RG, Moshier WC, Shaw B et al (1994) Corrosion-resistant aluminum matrix for graphite-aluminum composites. J Corros Sci 50(11):819CrossRefGoogle Scholar
  13. 13.
    Lin CS, Fang SK (2005) Formation of cerium conversion coatings on AZ31 magnesium alloys. J Electrochem Soc 152(2):B54CrossRefGoogle Scholar
  14. 14.
    Decroly A, Petitjean J-P (2005) Study of the deposition of cerium oxide by conversion on to aluminum alloys. J Surf Coat Technol 194:1CrossRefGoogle Scholar
  15. 15.
    Campestrini P, Terryn H, Hovestad A, de Wit JHW (2004) Formation of a cerium-based conversion coating on AA2024: relationship with the microstructure. J Surf Coat Technol 176(3):365CrossRefGoogle Scholar
  16. 16.
    Pardo A, Merino MC, Arrabal R, Viejo F (2006) Carboneras M Improvement of corrosion behavior of A3xx.x/SiCp composites in 3.5 wt% NaCl solution by Ce surface coatings. J Electrochem Soc 153(2):B52CrossRefGoogle Scholar
  17. 17.
    Aramaki K (2003) XPS and EPMA studies on self-healing mechanism of a protective film composed of hydrated cerium(III) oxide and sodium phosphate on zinc. J Corros Sci 45(1):199CrossRefGoogle Scholar
  18. 18.
    Aramaki K (2001) The inhibition effects of cation inhibitors on corrosion of zinc in aerated 0.5 M NaCl. J Corros Sci 43(8):1573CrossRefGoogle Scholar
  19. 19.
    Yu XW, Yan CW, Cao CN (2002) Study on the rare earth sealing procedure of the porous film of anodized Al6061/SiCp. J Mater Chem Phy 76:228CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Chunyu Wang
    • 1
    Email author
  • Gaohui Wu
    • 1
  • Qiang Zhang
    • 1
  • Longtao Jiang
    • 1
  1. 1.School of Materials Science and Engineering, Harbin Institute of TechnologyHarbinP.R. China

Personalised recommendations