Corrosion Science and Technology

  • 제7권3호
  • /
  • Pages.168-172
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  • 2008
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  • 1598-6462(pISSN)
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  • 2288-6524(eISSN)
한국부식방식학회 (The Corrosion Science Society of Korea)
권호 표지

Electrochemical Random Signal Analysis during Localized Corrosion of Anodized 1100 Aluminum Alloy in Chloride Environments

  • Sakairi, M. (Graduate School of Engineering, Hokkaido University) ;
  • Shimoyama, Y. (Graduate School of Engineering, Hokkaido University) ;
  • Nagasawa, D. (Nippon light metal co. ltd.)
  • 발행 : 2008.06.01
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초록

A new type of electrochemical random signal (electrochemical noise) analysis technique was applied to localized corrosion of anodic oxide film formed 1100 aluminum alloy in $0.5kmol/m^3$ $H_3BO_4/0.05kmol/m^3$ $Na_2B_4O_7$ with $0.01kmol/m^3$ NaCl. The effect of anodic oxide film structure, barrier type, porous type, and composite type on galvanic corrosion resistance was also examined. Before localized corrosion started, incubation period for pitting corrosion, both current and potential slightly change as initial value with time. The incubation period of porous type anodic oxide specimens are longer than that of barrier type anodic oxide specimens. While pitting corrosion, the current and potential were changed with fluctuations and the potential and the current fluctuations show a good correlation. The records of the current and potential were processed by calculating the power spectrum density (PSD) by the Fast Fourier Transform (FFT) method. The potential and current PSD decrease with increasing frequency, and the slopes are steeper than or equal to minus one (-1). This technique allows observation of electrochemical impedance changes during localized corrosion.

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참고문헌

  1. K. Watanabe, M. Sakairi, H. Takahashi, S. Hirai, and S. Yamaguchi, J. Electroanal. Chem., 473, 250 (1999) https://doi.org/10.1016/S0022-0728(99)00121-7
  2. Y. Li, S. Shigyo, M. Sakairi, H. Takahashi, and M. Seo, J. Electrochm. Soc., 144, 866 (1997) https://doi.org/10.1149/1.1837501
  3. M. Sakairi, P. Skeldon, G. E. Thompson, G. C. Wood, and K. Stevens, Proc. of ASST 2000, 410 (2000)
  4. M. Sakairi, P. Skeldon, G. E. Thompson, G. C. Wood, andens, Electrochem. Soc. Proc., 99, 171 (1999)
  5. Y. Baba, Oxide film by electrolysis, Maki-Syoten, 28, (1996)
  6. Y. Takashima, K. Miwa, M. Sakairi, and H. Takahashi, J. Surf. Fin. Soc. Jpn., 51, 625 (2000) https://doi.org/10.4139/sfj.51.625
  7. M. Sakairi, Z. Kato, S. Chu, H. Takahahshi, Y. Abe, and N Katayama, Electrochemistry, 71, 920 (2003)
  8. S. Z. Chu, M. Sakairi, and H. Takahashi, K. Shimamura and Y. Abe, J. Electrochme. Soc., 147, 2181 (2000) https://doi.org/10.1149/1.1393504
  9. T. Kikuchi, M. Sakairi, H. Takahashi, Y. Abe, and N. Katayama, Surface and coatings technology, 169, 199 (2003) https://doi.org/10.1016/S0257-8972(03)00068-9
  10. T. Kikuchi, M. Sakairi, and H. Takahashi, J. Electrochem. Soc., 150, C567 (2003) https://doi.org/10.1149/1.1593043
  11. T. Kikuchi, M. Sakairi, H. Takahashi, Y. Abe, and N. Katayama, J. Electrochem. Soc., 148, C740 (2001) https://doi.org/10.1149/1.1409973
  12. T. Yanagishita, Y. Tomabechi, K. Nishio, and H. Masuda, Langmuir, 20, 554 (2004) https://doi.org/10.1021/la030314a
  13. F. Matsumoto, K. Nishio, T. Miyasaka, H. Masuda, Jpn. J. App. Phys. 2-Letters & Express Letter, 43(5A), L640 (2004) https://doi.org/10.1143/JJAP.43.L640
  14. H. Masuda, F. Matsumoto, and K. Nishio, Electrochemistry, 72, 389 (2004)
  15. U. Bertocci, C. Gabrielli, F. Huet, and M. Keddam, J. Electrochem. Soc., 144, 31 (1997) https://doi.org/10.1149/1.1837361
  16. U. Bertocci, C. Gabrielli, F. Huet, M. Keddam, and P Rousseau, J. Electrochem. Soc., 144, 37 (1997) https://doi.org/10.1149/1.1837362
  17. T. Tsuru and M. Yaginuma, Zairyo-to-Kankyo, 52, 488 (2003) https://doi.org/10.3323/jcorr1991.52.488
  18. H. Yashiro, M. Kumagai, and M. Kumagai, Zairyo-to-Kankyo, 52, 466 (2003) https://doi.org/10.3323/jcorr1991.52.466
  19. Y. Ioti, S. Take, and Y. Okuyama, Zairyo-to-Kankyo, 52, 471 (2003) https://doi.org/10.3323/jcorr1991.52.471
  20. H. Inoue, M. Kinoshita, and Y. Maeda, Zairyo-to-Kankyo, 52, 483 (2003) https://doi.org/10.3323/jcorr1991.52.483
  21. Y. Yoneda and H. Inoue, Zairyo-to-Kankyo, 52, 495 (2003)
  22. M. Sakairi and Y. Shimoyama, Electrochemistry, Electrochemistry, 74, 458 (2006) https://doi.org/10.5796/electrochemistry.74.458
  23. M. Sakairi and Y. Shimoyama, submitted to J. JSEM
  24. S. -M. Moon, M. Sakairi, and H. Takahashi, J. Electrochem. Soc., 150, B473 (2003) https://doi.org/10.1149/1.1603248