Corrosion Inhibition of Mild Steel in Acidic Medium using 2-amino Thiophenoland 2-Cyanomethyl Benzothiazole
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The corrosion inhibition characteristics of 2-amino thiophenol (ATP) and 2-cyanomethyl benzothiazole (CNMBT) on two types of steel in 1m HCl medium were investigated at different temperatures (25, 30, 35, 40 and 50°C). The pitting corrosion behaviour for the same system was studied using a potentiodynamic technique. The pitting corrosion resistance of steel samples increased with increase in concentration of the ATP and CNMBT. Some samples were examined by scanning electron microscopy. The effects of the inhibitors on the general corrosion of the two samples were investigated by using gravimetric and galvanostatic polarization techniques. The inhibition efficiencies increased with increase their concentration but decreased with increase in temperature. Free energies of activation, enthalpies and entropies for the inhibition processes were determined from rate constant data measured and different temperatures at different concentrations of ATP and CNMBT. Results were compared with fits obtained from the application of the Langmuir isotherm. Results were correlated to the chemical structure of the inhibitors. The inhibition efficiency of CNMBT is higher than that of ATP.
- G. Schmitt and K. Bedbur, Proc. 9th International Congress on `Metallic Corrosion’, Toronto, Canada, (1984), p. 112.
- S.L. Granese and B.M. Rosales, Proc. 10th International Congress on `Metallic Corrosion’, Madras, India, (1987), p. 2733.
- S.L. Granese, Corrosion 44 (1988) 332.
- S.L. Granese, C.O. Degonzalez and B. Rosales, Quimindustria La Habana, Cuba 88 (1988) 176.
- B. Abd-El Nabey, E. Khamis, G. Thompson and J. Dawson, Surf. Coat. Technol. 28 (1986) 83.
- F. Mansfeld, ’Corrosion Mechanism’, Marcel Dekker, New York, (1987), p. 285.
- E. Stupnisek-Lisac, K. Salajster and J. Furac, Corros. Sci. 28 (1988) 1189.
- 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. Arab and Abd El-Nabey, Ind. J. Chem. 2 (1991) 23.
- S. Arab and E.A. Noor, Corrosion 49(2) (1993) 122.
- G. Schmitt, Br. Corros. J. 19 (1984) 165.
- S. Rengamani, S. Muralidharan, M. Anbu Kulandainathan and S.V.K. Iyer, J. Appl. Electrochem. 24 (1994) 355.
- S.A.M. Refaey, Appl. Surf. Sci. (1999), submitted.
- S.A.M. Refaey, S.S. Abe El-Rehim, F. Taha, M.B. Saleh and R.A. Ahmed, Appl. Surf. Sci. (1999), submitted.
- K. Saito, S. Kambe, R. Nakano, A. Sakurai and H. Midorikowa, Synthesis 210 (1983).
- K. Haladky, L. Collow and J. Dawson, Br. Corros. J. 15 (1980) 20.
- I. Putilova, S. Balezin and V. Barannik, ’Metallic Corrosion Inhibitors’, Pergamon, Oxford, (1960).
- Langmuir, J. Am. Chem. Soc . 39 (1947) 1848.
- A.G. Alshkel, M.M. Hefny and A.R. Ismail, Corr. Prevent. Control 155 (1987).
- Corrosion Inhibition of Mild Steel in Acidic Medium using 2-amino Thiophenoland 2-Cyanomethyl Benzothiazole
Journal of Applied Electrochemistry
Volume 31, Issue 4 , pp 429-435
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- Kluwer Academic Publishers
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- 2-amino thiophenol
- 2-cyanomethyl benzthiazol
- steel and thermodynamic parameters
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