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Journal of Applied Electrochemistry

, Volume 25, Issue 2, pp 137–141 | Cite as

Inhibiting effects of benzotriazole on the corrosion of α-Al-bronze in saline water

  • E. A. Ashour
  • S. M. Sayed
  • B. G. Ateya
Papers

Abstract

The inhibiting effect of benzotriazole (BTA) on the corrosion of α-Al-bronze (Cu-7% Al) in 3.4% NaCl was studied. BTA showed good inhibition effects from short up to extended periods of time (about six weeks). The morphologies of the alloy surface were monitored after various periods of corrosion in the absence and presence of BTA, using SEM. The corrosion products were identified by X-ray diffraction. Corrosive attack occurs very early in the absence of BTA, leading to general and pitting corrosion. BTA was found to have a stronger inhibiting effect on the anodic dissolution of copper than on the cathodic reduction of oxygen. The current-potential relation is divided into two regions: region I within which BTA has a strong effect on the charge transfer kinetics, and a limiting current region where BTA has no significant inhibiting effect. It is also shown that the interaction of BTA with a Cu20-covered alloy surface is faster than on reduced alloy surfaces, although the protection efficiency on the latter is slightly better than on the former.

Keywords

Charge Transfer Saline Water Significant Inhibit Extended Period Corrosion Product 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    R. B. Ross, ‘Metallic Materials Specification Handbook’, 3rd edn, E. & F. N. Spon, London (1968) p. 139.Google Scholar
  2. [2]
    P. J. Mackin and A. A. Smith, ‘The Aluminium Bronzes’, 2nd edn, Copper Development Association, London (1966).Google Scholar
  3. [3]
    Z. Ahmed, Br. Corros. J. 11 (1976) 149.Google Scholar
  4. [4]
    H. Leidheiser, Jr. ‘The Corrosion of Copper, Tin and their Alloys’, John Wiley & Sons (1971) p. 82.Google Scholar
  5. [5]
    K. Chandler, ‘Marine and Offshore Corrosion’, Butterworths, London (1985) p. 122.Google Scholar
  6. [6]
    F. L. La Que, ‘Marine Corrosion’, John Wiley & Sons, New York (1975) p. 223.Google Scholar
  7. [7]
    B. G. Atyea, E. A. Ashour and S. M. Sayed, J. Electrochem. Soc. 141 (1994) 71.Google Scholar
  8. [8]
    G. W. Lorimer, F. Hasan, J. Iqbal and N. Ridley, Br. Corros. J. 21 (1986) 244.Google Scholar
  9. [9]
    D. Tromans and Ru-Hong Sum, J. Electrochem. Soc. 138 (1991) 3235.Google Scholar
  10. [10]
    C. Clerc and R. C. Alkire, ibid. 138 (1991) 25.Google Scholar
  11. [11]
    R. Youda, H. Nishihara and K. Aramaki, Electrochim. Acta. 35 (1990) 35.Google Scholar
  12. [12]
    C. Törnkvist, D. Thierry, J. Bergman, B. Leidberg and C. Leygraf, J. Electrochem. Soc. 136 (1989) 58.Google Scholar
  13. [13]
    G. Zhou, S. Cai, L. Song, H. Yang, A. Ibrahim, Y. G. Lee and B. H. Loo, Appl. Surf. Sci. 52 (1991) 227.Google Scholar
  14. [14]
    M. M. Laz, R. M. Souto, S. Gonzalez, R. C. Salvarezza and A. J. Arvia, J. Appl. Electrochem. 22 (1992) 1129.Google Scholar
  15. [15]
    E. M. M. Sutter, C. Fiaud and D. Lincot, Electrochim. Acta 38 (1993) 1471.Google Scholar
  16. [16]
    Y. C. Wu, P. Zhang, H. W. Pickering and D. L. Allara, J. Electrochem. Soc. 140 (1993) 2791.Google Scholar
  17. [17]
    Zhi Xu, Sharon Lau and P. W. Bohn, Langmuir 9 (1993) 993.Google Scholar
  18. [18]
    V. Brusic, G. S. Frankel, A. G. Schrott and T. A. Petersen, J. Electrochem. Soc. 140 (1993) 2507.Google Scholar
  19. [19]
    F. Mansfeld, T. Smith and E. P. Parry, Corrosion (NACE) 27 (1971) 289.Google Scholar
  20. [20]
    I. Dugdale and J. B. Cotton, Corros. Sci. 3 (1963) 69.Google Scholar
  21. [21]
    J. B. Cotton and I. R. Scholes, Br. Corros. J. 2 (1967) 1.Google Scholar
  22. [22]
    R. C. Alkire and A. Cangellari, J. Electrochem. Soc. 136 (1989) 913.Google Scholar
  23. [23]
    P. G. Fox, G. Lewis and P. J. Boden, Corros. Sci. 19 (1979) 457.Google Scholar
  24. [24]
    D. Chadwick and T. Hashemi, ibid. 18 (1978) 39.Google Scholar

Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • E. A. Ashour
    • 1
  • S. M. Sayed
    • 1
  • B. G. Ateya
    • 2
  1. 1.National Research CentreDokki, CairoEgypt
  2. 2.Faculty of ScienceCairo UniversityCairoEgypt

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