Journal of Applied Electrochemistry

, Volume 35, Issue 1, pp 33–39 | Cite as

Thiazoles as corrosion inhibitors for mild steel in formic and acetic acid solutions

  • M. A. Quraishi
  • H. K. Sharma


2-(N,N-dimethylamino) benzylidene imino-4-(4-methyl phenyl)-1,3-thiazole (DIMPT), 2-benzylidene imino-4-(4-methyl phenyl)-1,3-thiazole (BIMPT), 2-salicylidene imino-4-(4-methyl phenyl)-1,3-thiazole (SIMPT) and 2-cinnamylidene imino-4-(4-methyl phenyl)-1,3-thiazole (CIMPT) were synthesized in the laboratory and their influence on the inhibition of corrosion of mild steel in 20 formic acid and 20 acetic acid was investigated by weight loss and potentiodynamic polarization techniques. The inhibition efficiency of these compounds was found to vary with their nature and concentration, temperature, immersion time and acid concentration. The values of activation energy and free energy of adsorption of the thiazoles were calculated to investigate the mechanism of corrosion inhibition. The adsorption of all the thiazoles on mild steel surface was found to obey Langmuir adsorption isotherm. The potentiodynamic polarization result revealed that the compounds studied are mixed type inhibitors. Electrochemical impedance spectroscopy was used to investigate the mechanism of corrosion inhibition.


langmuir adsorption isotherm mild steel potentiodynamic polarization thiazoles 


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  1. Sekine, I.A., Masuko, A., Senoo, K. 1987Corros. Sci.43553Google Scholar
  2. Quraishi, M.A., Jamal, D. 2000Corrosion56156Google Scholar
  3. Singh, V.B., Singh, R.N. 1995Corros. Sci.371399Google Scholar
  4. Sekine, I., Hatakeyama, S., Nakazawa, Y. 1987Corros. Sci.27275Google Scholar
  5. Heitz, E. eds. 1974‘Corrosion of Metals in Organic Solvents’Plenum PressNew York, NY226Google Scholar
  6. Sekine, I., Ohkawa, H., Hank, T. 1982Corros. Sci.221113Google Scholar
  7. Sekine, I., Chinda, A. 1984Corrosion4095Google Scholar
  8. Singh, M.M., Gupta, A. 1996Mat. Chem. Phy.4615Google Scholar
  9. Muralidharan, S., Iyer, S.V.K. 1997Anti-Corros. Met. Mater.44100Google Scholar
  10. Quraishi, M.A., Khan, M.A.W., Ajmal, M. 1996Anti-Corros. Met. Mater.435Google Scholar
  11. Hammouti, B., Aouniti, A., Taleb, M., Bright, M., Kertit, S. 1995Corrosion51411Google Scholar
  12. N. Al-Andis, E., Khamis, A., Al-.Mayouf, H., Aboul-Enein ,  1995Corros. Prev. Cont.4213Google Scholar
  13. Abd-El-Nabey, E., Khammis, M.Sh., Ramadan, A., El-Gindy , A. 1996Corrosion52671Google Scholar
  14. ASTM (American Society for testing and Materials), ‘Metal Corrosion, Erosion and Wear’, Annual Book of ASTM Standards (1987) 0.3.02, G1–72.Google Scholar
  15. Quraishi, M.A., Khan, M.W., Ajmal, M., Muralidharan, S., Iyer, S.V. 1996Anti-Corros. Met. Mater.435Google Scholar
  16. Schmitt, G. 1984Brit. Corros. J.19165Google Scholar
  17. Quraishi, M.A., Khan, M.W., Ajmal, M., Muralidharan, S., Iyer , S.V. 1996J. Appl. Electrochem.261253Google Scholar
  18. Ajmal, M., Jamal, D., Quraishi, M. A. 2000Anti-Corros. Met. Mater.4777Google Scholar
  19. Schorr, M., Yahalom, J. 1972Corros. Sci.12867Google Scholar
  20. Vashi, R.T., Champaneri, V.A. 1997Ind. J. Chem. Technol.4180Google Scholar
  21. J. Radosevic, M. Kliskic, L.J. Aljinovic and S. Vuko, Proceedings of the 8th European Symposium on ‘Corrosion Inhibition’, Ann. Univ. Ferrara, Italy (1995), p. 817.Google Scholar
  22. Putilova, I.N.Balezin, S.A.Baranik, U.P. eds. 1960 ‘Metal Corrosion Inhibitors’Pergamon PressNew York, NYGoogle Scholar
  23. Gomma, G.K., Wahadan, M.H. 1995Ind. J. Chem. Technol.2107Google Scholar
  24. Achouri, M. El, Hajji, M.S., Salem, M., Kertit, S., Aride, J., Coudert, R., Essassi, E. 1996Corrosion52103Google Scholar
  25. Muralidharan, S., Phani, K.L.N., Ravichandran, S., Iyer, S.V.K. 1995J. Electrochem. Soc. (USA),1421478Google Scholar
  26. Hirozawa, S.T. 1995Proc. 8th Eur. Symp. Corros. Inhib. Ann. University, Ferrara, Italy,125Google Scholar
  27. Quraishi, M.A., Rawat, J., Ajmal, M. 1998Corrosion54996Google Scholar

Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and TechnologyAligarh Muslim UniversityAligarhIndia

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