A.K. Dubeya),* and G. Singh b)
a Polymer & Soft Material Section (PSMS), National Physical Laboratory (NPL), Dr. K.S. Krishnan Marg, New Delhi-110012, India.
b Corrosion Research Laboratory, Department of Chemistry, University of Delhi-110007, India.
Received 12 January 2006; accepted 24 May 2006
Abstract
The corrosion inhibition of mild steel in one normal sulphuric acid solution by Brij-30 has been studied in relation to the concentration of the inhibitor as well as the temperature using electrochemical polarization (galvanostatic and potentiostatic) techniques. The results were supplemented with scanning electron microscopy and infra-red spectroscopy. All the methods employed are in reasonable agreement. There is no particular relationship of inhibition with concentration and temperatures. The thermodynamic functions of dissolution and adsorption processes were calculated from experimental polarization data and the interpretation of the results is given. Adsorption of Brij-30 was found to follow the Langmuir’s adsorption isotherm. Brij-30 is a mixed type of inhibitor.
Keywords: Brij-30, corrosion inhibitors, mild steel, H2SO4, adsorption process, SEM, IR spectra
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References
1. Xianghong Li and Guannan Mu, Applied Surface Science 252-5 (2005) 1254. [ Links ]
2. M.A. Quraishi, R.Sardar, Materials Chemistry and Physics 71-3 (2001) 309.
3. M.M. Osman, R.A. El-Ghazawy and A.M. Al-Sabagh, Materials Chemistry and Physics 80 (2003) 55.
4. C. Jeyaprabha, S. Sathiyanarayan, G. Venkatchari, Appl. Surf. Sci. 246 (2005) 108.
5. K.L. Vasanth, NACE, National Association of Corrosion Engineers, Paper# 233, Corrosion 96.
6. M.A. Migahed, Prog. In. Org. Coat. 54 (2005) 92.
]]> 7. J.M. Abd El-Kader, A.A. El-Warraky, A.M. Abd El-aziz, Br. Corros. J. 33-02 (1998) 139.8. I.N. Putilova, S.A. Balezin and V.P. Barannik, Met. Corros. Inhibitors, Pergamm Press, N.Y. (1960) 31.
9. D. Schweinsberg, G. George, A. Nanayakkara, D. Steiner, Corr.Sci.28(1988),55
10. A. Fouda, M. Moussa, P. Taha and E.L. Neanaa, Corr. Sci. 26 (1986) 719.
11. N. Hackerman, E. Snavely Jr. and J.S. Payne, J. Electrochem. Soc. 113 (1966) 651.
12. T. Murekewa, N. Hackerman, Corr. Sci. 4 (987) 051.
13. J.O’ M. Bockris and Drazic, Electrochim. Acta 7 (1962) 293.
14. G. Moretti, G. Quartarone, A. Tatsan and A. Zingales, Werkst. Korros. 45 (1994) 5.
15. M.A. Quraishi, J. Rawat and M. Ajmal, J. Appl. Electrochem. 30 (2000) 745.
16. H. Ashassi-Sorkhabi and S.A. Nabavi-Amri, Acta Chim. Slov. 47 (2000) 512.
]]>* Corresponding author. E-mail address: dubey_delhi@rediffmail.com
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