Corrosion Inhibition of Mild Steel by Using Cetyl Pyridinium Bromide (CPB)

A.K. Dubey^a,* and G. Singh^b

^a Polymer and 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 29 September 2006

 

Abstract

The corrosion inhibition of mild steel in one normal sulphuric acid solution by CPB 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 are given. Adsorption of CPB was found to follow the Langmuir’s adsorption isotherm. Brij-30 is a mixed type of inhibitor.

Keywords: cetyl pyridinium bromide (CPB), corrosion inhibitors, mild steel, H₂SO₄, adsorption process, SEM, infra-red spectroscopy

 

Texto disponível em PDF

Full text only in PDF format

 

References

1. F. Bentiss, M. Lagrenee, M. Traisnel, J.C. Hornez, Corrosion Scicence 41 (1999) 789.

2. A. Chetouani, B. Hammouti, A. Aouniti, N. Benchat and T. Benhadda, Progress in Organic Coatings 45(2002) 373.

3. M. Hourani and F. Wedian, Corrosion Science 42 (2000) 2131.

4. F. Touhami, A. Aouniti, Y. Abed, B. Hammouti, S. Kertit, A. Ramdani and K. Elkacemi, Corrosion Science 42 (2000) 929.

5. L. Elkadi, B. Mernari, M. Traisnel, F. Bentiss and M. Lagrenee, Corrosion Science 42 (2000) 703.

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. 33-2 (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, Corros. Sci. 28 (1988) 55.

10. A. Fouda, M. Moussa, P. Taha and E.L. Neanaa, Corros. 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, Corros. Sci. 4 (1987) 1051.

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