Abstract
4-aminoantipyrine (AAP) was tested as a corrosion inhibitor for mild steel in 2 M HCl solution using different techniques: weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that AAP is an inhibitor for mild steel in this medium. The inhibition was assumed to occur via adsorption of the inhibitor molecule on the metal surface. In the 20 to 60 ∘C temperature range, the AAP adsorption follows the Flory–Huggins isotherm and/or the El-Awady et al. kinetic-thermodynamic model. The protection efficiency increases with increasing inhibitor concentration (in the range 10−310−2 M) but decreases with increasing temperature. The thermodynamic functions of dissolution and adsorption processes were calculated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. El-Sayed, J. Appl. Electrochem. 27 (1997) 193.
G. Schmitt, Br. Corros. J. 19 (1984) 165.
J.M. Sykes, Br. Corros. J. 25 (1990) 175.
P. Chatterjee, M.K. Banerjee and K.P. Mukherjee, Indian J. Technol. 29 (1991) 191.
S. Rengamani, S. Muralidharan, M. Anbu Kulamdainathan and S. Venkatakrishna Iyer, J. Appl. Electrochem. 24 (1994) 355.
G.K. Gomma and M.H. Wahdan, Bull. Chem. Soc. Jpn. 67 (1994) 2621.
M. Ajmal, A.S. Mideen and M.A. Quraishi, Corros. Sci. 36 (1994) 79.
A. El-Sayed, J. Appl. Electrochem. 27 (1992) 193.
M.K. Gomma and M.H. Wahdan, Mater.Chem.Phys. 39 (1995) 209.
J. Marsh, 'Advanced Organic Chemistry', 3rd edn. (Wiley Eastern, New Delhi 1988).
E. Khamis, A. Hosny and S. El-Hadary Afinidad (Rev. Quim. Teor. Aplic) 456 (1995) 95.
A. El-Awady, A. Abd El-Nabey, S. Aziz, M. Khalifa and H. Al-Ghamdey: Int. J. Chem. 1 (1990) 169.
A. El-Awady, A. Abd El-Nabey and S. Aziz, J. Electrochem. Soc. 139 (1992) 2149.
S. Sankarapapavinasam and M.F. Ahmed, J. Appl. Electrochem. 22 (1992) 390.
B.A. Abd El-Naby, E. Khamis, M.SH. Ramdan and A. El. Gindy. 8th European Symposium on Corrosion Inhibitors, Ann., Univ. Ferrara N. S., Sez. 10 (1995) 299.
M.J. Lampinen and M. Fomino, J. Electrochem. Soc. 140 (1993) 3537.
R.K. Dinnappa and S.M. Mayann, J. Appl. Electrochem. 11 (1981) 111.
G. Moretti, G. Quartarone, A. Tassan and A. Zingales, Electro-chim. Acta 41 (1996) 1971.
T.P. Hoar and R.P. Khera, Proc. 1st European Symposium on Corrosion Inhibitors, Ferrara, Italy, University of Ferrara 73 (1960).
A. El-Sayed, Corros. Prevention & Control. 43 (1996) 29.
I. Sekine, M. Sabongi, H. Hagiuda, T. Oshibe, M. Yuasa, T. Imahama, Y. Shibata and T. Wake, J. Electrochem. Soc. 139 (1992) 3167.
A. El-Sayed, J. Appl. Electrochem. 27 (1997) 194.
S. Muraldharan, M. A. Quraishi and S.V.K. Iyer, Corros. Sci. 37(11) (1995) 1739.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
El-Rehim, S.S.A., Ibrahim, M.A.M. & Khaled, K.F. 4-Aminoantipyrine as an inhibitor of mild steel corrosion in HCl solution. Journal of Applied Electrochemistry 29, 593–599 (1999). https://doi.org/10.1023/A:1003450818083
Issue Date:
DOI: https://doi.org/10.1023/A:1003450818083