0872-1904 0872-1904 S0872-19042011000200001 India India 00 00 2011 00 00 2011 29 2 69 78

93%) for 304 SS in HCl solution. The inhibitor functions through adsorption following Temkin’s adsorption isotherm, and the inhibition was governed by physisorption mechanism. The thermodynamic parameters deduced for the adsorption process reveal spontaneous adsorption of the compound on the alloy steel surface.]]>

 Corrosion Inhibition of 304 SS in Hydrochloric Acid Solution by N – Furfuryl N'– Phenyl Thiourea

 

R. Herle,1,* P. Shetty,2 S.D. Shetty1 and U.A. Kini1

1Department of Mechanical Engineering, Manipal Institute of Technology, Manipal University, Manipal 576104, Karnataka, India.

 2Department of Printing & Media Engineering, Manipal Institute of  Technology, Manipal University, Manipal 576104, Karnataka, India.

 

DOI: 10.4152/pea.201102069

 

Abstract

The inhibition of corrosion of 304 SS in 2 N HCl solutions by N – furfuryl – N' phenyl thiourea (FPTU) has been investigated using potentiodynamic polarization techniques. The results obtained reveal that FPTU performs excellently as anodic inhibitor (IE> 93%) for 304 SS in HCl solution. The inhibitor functions through adsorption following Temkin’s adsorption isotherm, and the inhibition was governed by physisorption mechanism. The thermodynamic parameters deduced for the adsorption process reveal spontaneous adsorption of the compound on the alloy steel surface.

]]> Keywords: 304 SS, hydrochloric acid, inhibition, FPTU, adsorption.

 

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References

1.             S. Kadry, Eur. J. Scientific Res. 22 (2008) 508.         [ Links ]

2.             M. Bouklah, A. Ouassini, B. Hammouti, A. El Idrissi, Appl. Surf. Sci. 250 (2005) 50. 10.1016/j.apsusc.2004.12.021

3.             A. Ouchrif, M. Zegmout, B. Hammouti, Appl. Surf. Sci. 252 (2005) 339. 10.1016/j.apsusc.2005.01.005

4.             V.R. Salian, A.V. Adhikhari, Corros. Sci. 50 (2008) 55. 10.1016/j.corsci.2006.06.035

]]> 5.             S.A.M. Refaey, F. Taha, A. El-Malak, Appl. Surf. Sci. 236 (2004) 175. 10.1016/j.apsusc.2004.04.016

6.             S. Bilgic, N. Caliskan, Appl. Surf. Sci. 152 (1999) 107. 10.1016/S0169-4332(99)00308-6

7.             S.M.A. Hosseini, M. Salari, Ind. J. Chem. Technol. 16 (2009) 480.

8.             S.D. Shetty, P. Shetty, H.V.S. Nayak, Ind. J. Chem. Technol. 15 (2008) 216.

9.             A. Yildrim, M. Cetin, Corros. Sci. 50 (2008) 155. 10.1016/j.corsci.2007.06.015

10.         F. Zucchi, G. Trabanelli, Corros. Sci. 33 (1992) 1135. 10.1016/0010-938X(92)90167-2

11.         X.L. Cheng,  H.Y. Ma, Corros. Sci. 41 (1999) 321. 10.1016/S0010-938X(98)00125-5

12.         M. Abdallah, Corros. Sci. 44 (2002) 717. 10.1016/S0010-938X(01)00100-7

13.         Suma Rao, Padmalatha, A.N. Shetty,  J. Nayak, J. Met. Mater. Sci. 47 (2005) 51.

14.         M.A. Quraishi, M.Z.A. Rafique, S. Khan, N. Sexena, J. Corros. Sci. Eng. 10 (2006) 112.

]]> 15.          M.A. Quraishi, R. Sardar,  Ind. J. Chem. Technol. 11 (2004) 103.

16.         S.A. Ali,  A.M. El-Shareef, R.T. Al-Ghamdi, M.T. Saeed, Corros. Sci. 47 (2005) 2659. 10.1016/j.corsci.2004.11.007

17.         S. Divakara Shetty, Prakash Shetty, H.V. Sudhaker Nayak, Transactions of the SAEST 41 (2006) 23.

18.         Divakara Shetty, Prakash Shetty, H.V. Sudhaker Nayak, Ind. J. Chem. Technol. 12 (2005) 462.

19.         A.S. Fouda, H. El-Dafrawy, Int. J. Electrochem. Sci. 2 (2007) 721.

 

Acknowledgement

The authors would like to thank Prof. Dr. Somanath Mishra,  the Director, and Prof. Dr. N.Y. Sharma, Head, Department of Mechanical Engineering, Manipal Institute of Technology, Manipal,  for providing laboratory facilities.

 

* Corresponding author. E-mail address: ram.herle@manipal.edu

]]> Received 2 August 2010; accepted 13 February 2011

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