S. Rajendran, 1,* J. Jeyasundari,1 P. Usha,1 J. A. Selvi,1 B. Narayanasamy,2 A. P. P. Regis,3 P. Rengan4
1Corrosion Research Centre, Department of Chemistry, GTN Arts College, Dindigul -624005, India
2Department of Chemistry, Thiagarajar College of Engineering, Madurai, India
3Department of Chemistry, St. Joseph’s College, Trichy, India
4Department of Chemistry, Yadava College (Co-Education), Madurai, India
Received 9 October 2008; accepted 16 February 2009
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The inhibition efficiency (IE) of an aqueous extract of Hibiscus rosa-sinensis (white) in controlling corrosion of aluminium at pH 12 has been evaluated by weight loss method in the absence and presence of Zn2+. The formulation consisting of 8 mL flower extract (FE) and 50 ppm of Zn2+ had 98% inhibition efficiency. Polarization study revealed that this formulation functioned as cathodic inhibitor. AC impedance spectra revealed the presence of a protective film formed on the metal surface. FTIR spectra revealed that the protective film consisted of a complex formed between the active principle of the flower extract and Al3+.
Keywords: corrosion inhibition, aluminium, Hibiscus Rosa-sinensis, plant extract, environmental friendly inhibitor.
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1. M.A. Quraishi, M.Z.A. Rafiquee, S. Khan, N. Saxna, J. Appl. Electrochem. 37 (2007) 1153.
2. P. Arora, S. Kumar, M.K. Sharma, S.P. Mathur, E-J. Chem. 4 (2007) 450.
3. S.A. Umoren, O. Ogbobe, P.C. Okafor, E.E. Ebenso, J. Polym. Sci. 105 (2007) 3363. [ Links ]
4. O.K. Abiola, N.C. Oforka, E.E. Ebenso, N.M. Nwinuka, Anti-Corrosion Methods Mater. 54 (2007) 219. [ Links ]
5. E.E. Oguzie, Corros. Sci. 49 (2007) 1597. [ Links ]
6. S.A. Umoren, E.E. Ebenso, P.C. Okafor, U.J. Ekpe, O. Ogbobe, J. Appl. Polym. Sci. 103 (2007) 2810. [ Links ]
7. E.E. Oguzie, G.N. Onuoha, E.N. Ejike, Pigment and Resin Technol. 30 (2007) 44.
8. E.E. Oguzie, B.N. Okolue, C.E. Ogukwe, C. Unaegbu, Mater. Let. 60 (2006) 3376. [ Links ]
9. S. Rajendran, M. Manivannan, J.W. Sahayaraj, J.A. Selvi, J. Sathiyabama, A.J. Amalraj, N. Palaniswamy, Trans. SAEST 41 (2006) 63. [ Links ]
10. S . Rajendran, S. Muthulakshmi, R. Rajeswari, A. Vijitha, J. Electrochem. Soc., India 54 (2005) 50.
11. P.M. Barkhudarov, P.B. Shah, E.B. Watkis, D.A. Doshi, C.J. Brinker, J. Majewski, Corros. Sci. 50 (2008) 897.
12. K. Wapner, M. Stratmann, G. Grundmaier, Int. J. Adhesion Adhesives 28 (2008) 59.
13. E. Juzeliunas, R. Ramanauskas, A. Lugauskas, K. Leinartas, M. Samuleviciene, A. Sudavicius, R. Juskenas, Corros. Sci. 49 (2007) 4098.
14. A.K. Mishra, R. Balasubramaniam, Mater. Chem. Phys. 103 (2007) 385.
15. P.B. Srinivasan, W. Dietzel, R. Zettler, J.F. dos Santos, V. Sivan, Corros. Eng. Sci. Techn. 42 (2007) 161.
16. B.D. Chambers, S.R. Taylor, Corros. Sci. 49 (2007) 1597.
17. P. Karlsson, A.E.C. Palmquist, K. Holmberg, Adv. Colloid Interf. Sci. 128-130 (2007) 121. [ Links ]
18. A.J. Coleman, H.N. McMurray, G. Williams, A. Afseth, G. Seamans, Mater. Sci. Forum 519-521 (PART 1) (2006) 629.
19. S. Rajendran, V. Ganga Sri, J. Arockia Selvi and A. John Amalraj, Bulletin of Electrochemistry 21(8) (2005) 367-377.
]]>20. S. Rajendran, S. Shanmugapriya, T. Rajalakshmi, A.J. Amalraj, Corrosion 61 (2005) 685. [ Links ]
21. N. Anthony, E. Malarvizhi, P. Maheswari, S. Rajendran, N. Palaniswamy, Ind. J. Chem. Techn. 11 (2004) 346.
22. S. Rajendran, A.J. Amalraj, M.J. Joice, N. Anthony, D.C. Trivedi, M. Sundaravadivelu, Corros. Rev. 22 (2204) 233. [ Links ]
23. H.H. Rehan, Materialwissenschaft und Werkstoffechnik 34 (2003) 232.
24. L. Priya, A. Chitra, S. Rajendran, K. Anuradha, Surf. Eng. 21 (2005) 229.
25. T. Jain, R. Chowdhary, S.P. Mathur, Mater. Corros. 57 (2006) 422. [ Links ]
26. K. Anuradha, R. Vimala, B. Narayanasamy, J.A. Selvi, S. Rajendran, Chem. Eng. Comm. 195 (2008) 352.
* Corresponding author. E-mail address: srmjoany@sify.com
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