Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지

Effect of S-AITA on Mild Steel Corrosion in Acidic Medium

  • Chandrasekaran, V. (Research Laboratory, Department of Chemistry, Mahendra Arts and Science College) ;
  • Saravanan, J. (Research Laboratory, Department of Chemistry, Mahendra Arts and Science College)
  • Published : 2006.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

S-Acetyl Isothiourea Acetate (S-AITA) was synthesized in the laboratory and this influence on the inhibition of corrosion of mild steel in 1.11 N hydrochloric and 1.12 N sulphuric acids was investigated by weight loss and potentiostatic polarization techniques at 303K, 353K and 403K. These results were confirmed by the impedance technique. The inhibition efficiency increased with increase in concentration of inhibitor and decreased with rise in temperature from 303K to 403K. The maximum inhibition efficiency of S-AITA was found to be 99.95% (0.5% of S-AITA) at 303K in sulphuric acid. The adsorption of this compound on the mild steel surface from the acids has been found to obey Temkin's adsorption isotherm. The potentiostatic polarization results revealed that S-AITA was a mixed type inhibitor. Some thermodynamic parameters i.e., activation energy (Ea), free energy of adsorption (${\Delta}G_{ads}$), enthalpy of adsorption (${\Delta}H$) and entropy of adsorption (${\Delta}S$) were also calculated from weight loss data.

Keywords

References

  1. M. N. Desai and M. B. Desai, Carras. Sci., 24, 349 (1984)
  2. D. Sazou, M. Pagitsas, and C. Georlies, Electrochim Acta, 38, 2321 (1993) https://doi.org/10.1016/0013-4686(93)80116-H
  3. N. Hackerman and R. M. Hard, Corrosion, 116, 166 (1961)
  4. N. Hackerman, Symp. On Advances in Chelare Chemistry, Brookllyn Polytechnic Institute, p. 30 (1955)
  5. E. E. Ebenso, J.J. Ekpe, B. I. Ita, O. E. Offiong, and V. J. Ibok, Mater. Chem., Phys., 60, 79 (1999) https://doi.org/10.1016/S0254-0584(99)00074-7
  6. F. M. Donahue and K. Nobe, J Electrochem., Soc., 112, 886 (1965) https://doi.org/10.1149/1.2423723
  7. F. M. Donahue and K. Nobe, .J Electrochem. Soc., 114, 1012 (1967) https://doi.org/10.1149/1.2424173
  8. B. I. Ita and O. E. Offiong, Mater. Chem. Phys., 60, 79 (1999) https://doi.org/10.1016/S0254-0584(99)00074-7
  9. E. E. Ebenso, P. C. Okafor, O. E. Offiong, B. I. Ita, U. J. Ibok, and U. J. Ekpe, Bull. Electrochem., 17,460 (2001)
  10. E. E Ebenso, P. C. Okafor, O. E. Offiong, B. I. Ita, and U. J. Ekpe, Bull. Electrochem., 17, 131 (2001)
  11. R. C. Ayer and N. Hackerman, J. Electrochem. Soc., 111, 522 (1964) https://doi.org/10.1149/1.2426172
  12. G. Schmitt, Inhibition of Acid Media, in Corrosion Inhibitors, W.P. Report (11) 91, Inst. of Material, London (1994)
  13. G. Trabanel1i, Inhibitors for Chemical Cleaning Treatment in Corrosion Inhibitors, W.P. Report (11) 103, Inst. of Materials, London (1994)
  14. G. Trabanelli, F. Zucchi, and G. Brunoro, Werkst and Korros, 39, 589 (1988) https://doi.org/10.1002/maco.19880391206
  15. P. M. Mathar and T. Vasudevanan, Corrosion, 38, 17 (1982)
  16. ASTM G 31-72, 'Standard Practice for Laboratory Immersion Corrosion Testing of Metals', West Conshohocken PA: ASTM (1990)
  17. M. Ajmal, A. S. Mideen, and M. A. Quraishi, Corros. Sci., 36, 79 (1994) https://doi.org/10.1016/0010-938X(94)90110-4
  18. I. D. Talati and R. M. Modi, Trans SAEST, 11, 259 (1986)
  19. L. A. Al- Shamma, I M. Saleh, and N. A. Hikat, Corros. Sci., 27, 221 (1987) https://doi.org/10.1016/0010-938X(87)90018-7
  20. N. Subramanian and K. Ramakrishnaiah, Ind. J. Tech., 8, 369 (1970)
  21. E. E. Ebenso, Bull. Electrochem., 19, 209 (2003)
  22. P. Okafor, E. E. Ebenso, U. S. Ibok, U. J. Ekpe, and M. I. Ikpl, Trans SAEST, 38, 91 (2003)
  23. I. N. Putilova, V. P. Batannik, and S.S. Balezin, Metallic Corrosion Inhibitors, Pergamon Press, Oxford, 30-32(1960)
  24. M. A. Quraishi and R. Sardar, Bull. Electrochem., 18, 515 (2002)
  25. S. Brinic, A. Gurbac, R. Babic, and M. Metikos-Hukoric, $8^{th}$ Ear Symo Corrros Inhib, 1, 1997 (1995)
  26. G. K. Gomma and M. H. Wahdan, J. Chem. Tech., 2, 107 (1995)
  27. B. Ateya, L. Cal1ow, and J. Dawson, Br. Corros. J., 15, 20 (1980) https://doi.org/10.1179/000705980798318627
  28. N. Hackerman, Corrosion, 18, 332 t (1962) https://doi.org/10.5006/0010-9312-18.9.332
  29. B. G. Atya, B. E. El - Anadouli, and F. M. El -Nizamy, Corros. Sci., 24, 497 (1984) https://doi.org/10.1016/0010-938X(84)90032-5
  30. X. L. Cheng, H. Y. Ma, S. H. Chen, R. Yu, X. Chen, and Z. M. Yao, Corros. Sci, 41, 321 (1999)
  31. M. Bouayed, H. Rabaa, A. Srihiri, J.Y. Sail1ard, A. Ben Bachir, and L.A. Beuze, Corros. Sci., 41, 501 (1999)
  32. A. N. Frumkin, Z. Phys. Chem., 116, 484 (1985)
  33. O. Ikeda, H. Jimbo, and H. Maumura, J. Electronal. Chem., 137, 127 (1982) https://doi.org/10.1016/0022-0728(82)85072-9
  34. R. Parsons, J Electronal. Chem., 7, 136 (1964) https://doi.org/10.1016/0022-0728(64)85007-5
  35. J. O. M. Bockris and D. A. J. Swinkels, J Electrochem. Soc., 111, 736 (1964) https://doi.org/10.1149/1.2426222
  36. B. Ateya, B. EI - Anadouli, and F. El- Nizamy, Corros.Sci., 24, 509 (1984) https://doi.org/10.1016/0010-938X(84)90033-7
  37. M. A. Quraishi, J. Rawad, and M. Ajmal, Corrosion, 54, 996 (1998) https://doi.org/10.5006/1.3284822
  38. S. Muralidharan, M. A. Quaraishi, and S. V. K. Iyer, Corros. Sci., 37, 1739 (1995) https://doi.org/10.1016/0010-938X(95)00068-U
  39. M. A. Quaraishi, M. A. W. Khan, M. Ajmal, S. Muralidharan, and S. V. Iyer, J. Appl. Electrochem., 26, 1253 (1996)