SciELO - Scientific Electronic Library Online

 
vol.26 número2Studies on the Inhibitive Effect of Exudate Gum from Dacroydes edulis on the Acid Corrosion of AluminiumCorrosion Inhibition Efficiency of 3-Hydroxy-2-Methylquinazoline-4-one on Mild Steel in 1 M H2 SO4 and 1 M HCl Acid at Different Temperatures índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Portugaliae Electrochimica Acta

versão impressa ISSN 0872-1904

Port. Electrochim. Acta v.26 n.2 Coimbra  2008

 

Pyrazole Derivatives as Corrosion Inhibitors for Steel in Hydrochloric Acid

 

L. Herrag, A. Chetouani, S. Elkadiri, B. Hammouti,* A. Aouniti

 

Laboratoire de Chimie Appliquée & Environnement, Faculté des Sciences,Université Mohammed 1st, 60000 Oujda, Morocco

 

Received 17 May 2007; accepted 9 August 2007

 

Abstract

The effect of 1-{[benzyl-(2-cyano-ethyl)-amino]-methyl}-5-methyl-1H-pyrazole-3-carboxylic acid methyl ester (P1) and  1-{[benzyl-(2-cyano-ethyl)-amino]-methyl}-5-methyl-1H-pyrazole-3-carboxylic acid ethyl ester (P2) was evaluated as corrosion inhibitors of steel in molar hydrochloric using weight loss measurements and electrochemical polarisation. The results obtained reveal that those compounds reduce the corrosion rate. The inhibiting action increases with the concentration of pyrazole compounds to attain 98.5 % at the 10-3 M of (P2). The increase in temperature leads to a decrease in the inhibition efficiency of the compounds in the temperature range 308 - 353 K. The adsorption isotherm of inhibitors on the steel has been determined. The thermodynamic data of activation and adsorption are determined.

Keywords: pyrazole, inhibition, corrosion, steel, acid.

 

Texto disponível em PDF

Full text only in PDF format

 

References

1. G. Mengoly, M.M. Musiani, C. Pagura, F. Paoulucci, Corros. Sci. 31 (1991) 743.        [ Links ]

2. D. Bouzidi, S. Kertit, B. Hammouti, M. Brighli, J. Electrochem. Soc. India 46 (1997) 23.

3. S. Kertit, K. Bekkouch, B. Hammouti, Revue de Métallurgie (Paris) 97 (1998) 251.

4. Y. Abed, B. Hammouti, F. Touhami, A. Aouniti, S. Kertit, A. Mansri, K. Elkacemi, Bull. Electrochem. 17 (2001) 105.

5. F.B. Growcock, V.R. Lopp, Corros. Sci. 28 (1998) 397.

6. G. Quartarone, T. Bellomi, A. Zingales, Corros. Sci. 45 (2003) 715.

7. M. Bouklah, A. Attayibat, B. Hammouti, A. Ramdani, S. Radi, M. Benkaddour, Appl. Surf. Sci. 240 (2005) 341.

8. A. Aouniti, B. Hammouti, S. Kertit, Bull. Electrochem. 14 (1998) 193.

9. K.M. El-Sobki, H. Abbas, React. Solids 5 (1988) 191.

10. G. Subramaniam, K. Balasubramanian, P. Sridhar, Corros. Sci. 30 (1990) 1019.

11. Y. Xiao-Ci, Z. Hong, L. Ming-Dao, R. Hong-Xuan, Y. Lu-An, Corros. Sci. 42 (2000) 645.

12. M. Lashkari, M.R. Arshadi, Chem. Phys. 299 (2004) 131.

13. M. Benabdellah, R. Touzani, A. Aouniti, A. Dafali, S. El Kadiri, B. Hammouti, M. Benkaddour, Mater. Chem. Phys.   (2007). In press.

14. K. Tebbji, I. Bouabdellah, A. Aouniti, B. Hammouti, H. Oudda, M. Benkaddour and A. Ramdani, Materials Letters 61 (2007) 799.

15. A. Chetouani, M. Daoudi, B. Hammouti, T. Ben Hadda and M. Benkaddour, Corros. Sci. 48 (2006) 2987.

16. K. Tebbji, B. Hammouti, H. Oudda, A. Ramdani and M. Benkadour, Appl. Surf. Sci. 252 (2005) 1378.

17. M. Elayyachy, M. Elkodadi, A. Aouniti, A. Ramdani, B. Hammouti, F. Malek, A. Elidrissi, Mater. Chem. Phys. 93 (2005) 281.

18. L. Herrag, R. Touzani, A. Ramdani, B. Hammouti, Molbank 2006, M493

19. L. Herrag, R. Touzani, A. Ramdani, B. Hammouti, Molbank 2006, M494

20. A. Chetouani, B. Hammouti, A. Aouniti, N. Benchat, T. Benhadda, Prog. Org. Coat. 45 (2002) 373.

21. A. Chetouani, A. Aouniti, B. Hammouti, N. Benchat, T. Benhadda, S. Kertit, Corros. Sci. 45 (2003) 1675.

22. A. Popova, Corros. Sci. 49 (2007) 2144.

23. N.M. Guan, L. Xueming, L. Fei, Mater. Chem. Phys. 86 (2004) 59.

24. A. Yurt, A. Balaban, S.U. Kandemir, G. Bereket, B. Erk, Mater. Chem. Phys. 85 (2004) 420.

25. M. Bouklah, N. Benchat, B. Hammout, A. Aouniti, S. Kertit, Materials Letters 60 (2006) 1901.

26. F.M. Donahue, K. Nobe, J. Electrochem. Soc. 112 (1965) 886.

27. E. Khamis, F. Bellucci, R.M. Latanision, E.S.H. El-Ashry, Corrosion 47 (1991) 677.

28. W. Durnie, R.D. Marco, A. Jefferson, B. Kinsella, J. Electrochem. Soc. 146 (1999) 1751.

29. S.A. Ali, A.M. El-Shareef, R.F. Al-Ghamdi, M.T. Saeed, Corros. Sci. 47 (2005) 2659.

30. M. Abdallah and M. M. El-Naggar, Mater. Chem. Physics 71 (2001) 291.

31. A. Bousseksou, G. Molnár, J.A. Real, K. Tanaka, Coord. Chem. Rev. 251 (2007) 1822.

 

* Corresponding author. E-mail address: hammoutib@yahoo.fr

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons