Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Molybdate Chemical Conversion Coating of Electro-Galvanized Steel

전기아연도금 강판의 몰리브데이트 화성처리

  • Published : 2004.08.01
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Abstract

Molybdate chemical conversion coating layer formed on EGI has been studied in view of corrosion resistance, surface morphologies, and phases formed. It was found that coating layer consists of$ MoO_3$, $MoO_2$, Mo oxides having lower valences than 4 and ZnO. It is interesting to note that the coating layer formed at high Mo concentration (30 g/l) in the temperature range of $40-60^{\circ}C$ exhibited relatively high corrosion resistance, although thickness of coating layer is nearly identical with those formed under the other conditions. It was believed that an increase of driving force due to high Mo concentration plays an important role in the formation of corrosion-resistant coating layer, probably due to tile formation of dense coating layer.

Keywords

References

  1. R. L. Twite, G. P. Bierwagen, Progress in Organic Coating, 33 (1988) 91
  2. F. W. Eppensteiner, M. R. Jenkins, Metal Finishing, 98 (2000) 497 https://doi.org/10.1016/S0026-0576(00)80358-X
  3. Y. Liu, P. Skeldon, G. E. Thompson, H. Habazaki, K. Shimizu, Corrosion Science, 46 (2004) 297 https://doi.org/10.1016/S0010-938X(03)00157-4
  4. S. Langard, T. Norseth, Handbook on the Toxicity of Metals, Elsevier, New Youk, (1979)
  5. D. J. McCoy, Presented at the Second AESF/EPA Chromium Colloquium, Miami, FL, February (1990)
  6. L. S. Sanches, S. H. Domingues, E. B. Marino, Electrochemistry Communications, 6 (2003) 543 https://doi.org/10.1016/j.elecom.2004.04.002
  7. J. D. Ramsey, R. L. McCreery, Corrosion Science, 46(7) (2004) 1729 https://doi.org/10.1016/j.corsci.2003.10.010
  8. N. N. Voevodin, N. T. Grebasch, W. S. Soto, F. E. Amold, M. S. Donley, Surface and Coating Technology, 140 (2001) 24 https://doi.org/10.1016/S0257-8972(01)00999-9
  9. E. Almeida, T. C. Diamantino, M. O. Figueiredo, C. Sa, Surface and Coating Technology, 106 (1998) 8 https://doi.org/10.1016/S0257-8972(98)00464-2
  10. G. D. Wilcox, D. R. Gabe, Metal Finishing, 86(9) (1988) 71
  11. L. Jintang, K. Gang, C. Jinhong, X. Qiaoyu, S. Jinbing, Corrosion Science and Protection Technology, 13(1) (2001) 46
  12. J. A. Wharton, G. D. Wilcox, K. R. Baldwin, Trans IMF, 77(4) (1999) 152 https://doi.org/10.1080/00202967.1999.11871272
  13. G. D. Wilcox, D. R. Gabe, M. E. Warwick, Corrosion Rev, 6(4) (1986) 327
  14. D. R. Gabe, S. E. Gould, Surface and Coatings Technology, 35 (1988) 79 https://doi.org/10.1016/0257-8972(88)90059-X
  15. J. G. Choi, L. T. Thompson, Applied Surface Science, 93 (1996) 143 https://doi.org/10.1016/0169-4332(95)00317-7
  16. J. Lu, Z. Ye, J. Huang, L. Wang, B. Zhao, Applied Surface Science, 207 (2003) 295 https://doi.org/10.1016/S0169-4332(02)01502-7