Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Formation Behavior of Anodic Oxide Films on Al7075 Alloy in Sulfuric Acid Solution

황산용액에서 Al7075 합금 표면의 양극산화피막 형성거동

  • Received : 2014.07.09
  • Accepted : 2014.08.04
  • Published : 2014.08.30
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Abstract

The present work is concerned with the formation behavior of anodic oxide films on Al7075 alloy under a galvanostatic condition in 20 vol.% sulfuric acid solution. The formation behaviour of anodic oxide films was studied by the analyses of voltage-time curves and observations of colors, morphologies and thicknesses of anodic films with anodization time. Hardness of the anodic oxide films was also measured with anodization time and at different positions in the anodic films. Six different stages were observed with anodiziation time : barrier layer formation (stage I), pore formation (stage II), growth of porous films (stage III), abnormal rapid oxide growth (stage IV), growth of non-uniform oxide films (stage V) and breakdown of the thick oxide films under high anodic voltages (stage VI). Hardness of the anodic oxide films appeared to decrease with increasing anodization time and with the position towards the outer surface. This work provides useful information about the thickness, uniformity, imperfections and hardness distribution of the anodic oxide films formed on Al7075 alloy in sulfuric acid solution.

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References

  1. Soon Park, Tak Kang, Kor. Inst. Surf. Eng., 12 (1979) 167.
  2. D.R. Gabe, I.H. Dowty, Surf. and Coat. Tech., 30 (1987) 309. https://doi.org/10.1016/0257-8972(87)90088-0
  3. Y.-S. Kim, S.-I. Pyun, S.-M. Moon, J.-D. Kim, Corros. Sci., 38 (1996) 329. https://doi.org/10.1016/0010-938X(96)00131-X
  4. Sung-Mo Moon, Su-Il Pyun, Electrochim. Acta, 43 (1998) 3117. https://doi.org/10.1016/S0013-4686(97)10194-3
  5. Sung-Mo Moon, Su-Il Pyun, Electrochim. Acta, 44 (1999) 2445. https://doi.org/10.1016/S0013-4686(98)00368-5
  6. A. Mozalev, A. Poznyak, I. Mozaleva, A.W. Hassel, Electrochemistry Communications, 3 (2001) 299. https://doi.org/10.1016/S1388-2481(01)00157-6
  7. Charles A. Grubbs, Metal Finishing, 99 (2001) 478. https://doi.org/10.1016/S0026-0576(01)85308-3
  8. Charles A. Grubbs, Metal Finishing, 100 (2002) 463. https://doi.org/10.1016/S0026-0576(02)82050-5
  9. S. Moon, Y. Nam, C. Yang, Y. Jeong, Corros. Sci., 53 (2011) 1547. https://doi.org/10.1016/j.corsci.2011.01.029
  10. E. Matykina, R. Arrabal, F. Monfort, P. Skeldon, G.E. Thompson, Applied Surface Science, 255 (2008) 2830. https://doi.org/10.1016/j.apsusc.2008.08.036
  11. S. Moon, Y. Jeong, Corros. Sci., 51 (2009) 1506. https://doi.org/10.1016/j.corsci.2008.10.039
  12. Sungmo Moon, Yoonkyung Nam, Cheolnam Yang, Yongsoo Jeong, Kor. Inst. Surf. Eng., 42 (2009) 260. https://doi.org/10.5695/JKISE.2009.42.6.260
  13. E. Matykina, R. Arrabal, P. Skeldon, G.E. Thompson, Electrochi. Acta, 54 (2009) 6767. https://doi.org/10.1016/j.electacta.2009.06.088
  14. J. Jovovic, S. Stojadinovic, N.M. Sisovic, N. Konjevic, Surf. and Coat. Tech., 206 (2011) 24. https://doi.org/10.1016/j.surfcoat.2011.06.031
  15. Mehdi Javidi, Hossein Fadaee, Applied Surface Science, 286 (2013) 212. https://doi.org/10.1016/j.apsusc.2013.09.049
  16. J. Martin, A. Melhem, I. Shchedrina, T. Duchanoy, A. Nomine, G. Henrion, T. Czerwiec, T. Belmonte, Surf. and Coat. Tech., 221 (2013) 70. https://doi.org/10.1016/j.surfcoat.2013.01.029
  17. Alex Lugovskoy, Michael Zinigrad, Aleksey Kossenko, Barbara Kazanski, Applied Surface Science, 264 (2013) 743. https://doi.org/10.1016/j.apsusc.2012.10.114
  18. Tim Aerts, Iris De Graeve, Herman Terryn, Electrochim. Acta, 54 (2008) 270. https://doi.org/10.1016/j.electacta.2008.08.004
  19. A.K. Mukhopadhyay a, A.K. Sharma, Surf. and Coat. Tech., 92 (1997) 212. https://doi.org/10.1016/S0257-8972(97)00102-3
  20. M. Mokaddem, J. Tardelli, K. Ogle, E. Rocca, P. Volovitch, Electrochemistry Communications, 13 (2011) 42. https://doi.org/10.1016/j.elecom.2010.11.008

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