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.
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References
R. B. Ross, ‘Metallic Materials Specification Handbook’, 3rd edn, E. & F. N. Spon, London (1968) p. 139.
P. J. Mackin and A. A. Smith, ‘The Aluminium Bronzes’, 2nd edn, Copper Development Association, London (1966).
Z. Ahmed, Br. Corros. J. 11 (1976) 149.
H. Leidheiser, Jr. ‘The Corrosion of Copper, Tin and their Alloys’, John Wiley & Sons (1971) p. 82.
K. Chandler, ‘Marine and Offshore Corrosion’, Butterworths, London (1985) p. 122.
F. L. La Que, ‘Marine Corrosion’, John Wiley & Sons, New York (1975) p. 223.
B. G. Atyea, E. A. Ashour and S. M. Sayed, J. Electrochem. Soc. 141 (1994) 71.
G. W. Lorimer, F. Hasan, J. Iqbal and N. Ridley, Br. Corros. J. 21 (1986) 244.
D. Tromans and Ru-Hong Sum, J. Electrochem. Soc. 138 (1991) 3235.
C. Clerc and R. C. Alkire, ibid. 138 (1991) 25.
R. Youda, H. Nishihara and K. Aramaki, Electrochim. Acta. 35 (1990) 35.
C. Törnkvist, D. Thierry, J. Bergman, B. Leidberg and C. Leygraf, J. Electrochem. Soc. 136 (1989) 58.
G. Zhou, S. Cai, L. Song, H. Yang, A. Ibrahim, Y. G. Lee and B. H. Loo, Appl. Surf. Sci. 52 (1991) 227.
M. M. Laz, R. M. Souto, S. Gonzalez, R. C. Salvarezza and A. J. Arvia, J. Appl. Electrochem. 22 (1992) 1129.
E. M. M. Sutter, C. Fiaud and D. Lincot, Electrochim. Acta 38 (1993) 1471.
Y. C. Wu, P. Zhang, H. W. Pickering and D. L. Allara, J. Electrochem. Soc. 140 (1993) 2791.
Zhi Xu, Sharon Lau and P. W. Bohn, Langmuir 9 (1993) 993.
V. Brusic, G. S. Frankel, A. G. Schrott and T. A. Petersen, J. Electrochem. Soc. 140 (1993) 2507.
F. Mansfeld, T. Smith and E. P. Parry, Corrosion (NACE) 27 (1971) 289.
I. Dugdale and J. B. Cotton, Corros. Sci. 3 (1963) 69.
J. B. Cotton and I. R. Scholes, Br. Corros. J. 2 (1967) 1.
R. C. Alkire and A. Cangellari, J. Electrochem. Soc. 136 (1989) 913.
P. G. Fox, G. Lewis and P. J. Boden, Corros. Sci. 19 (1979) 457.
D. Chadwick and T. Hashemi, ibid. 18 (1978) 39.
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Ashour, E.A., Sayed, S.M. & Ateya, B.G. Inhibiting effects of benzotriazole on the corrosion of α-Al-bronze in saline water. J Appl Electrochem 25, 137–141 (1995). https://doi.org/10.1007/BF00248170
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DOI: https://doi.org/10.1007/BF00248170