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Polyalthia Longifolia as a Corrosion Inhibitor for Mild Steel in HCl Solution

Author Affiliations

  • 1Nirmala College for Women, Coimbatore, Tamilnadu, INDIA
  • 2BNM Institute of Technology, Bangalore, Karnataka, INDIA

Res.J.chem.sci., Volume 3, Issue (1), Pages 21-26, January,18 (2013)


Corrosion inhibition efficiency of dry Polyalthia longifolia (Asoka tree) leaves in 1N HCl medium was investigated by WEIGHT LOSS AND temperature studies. Effect of temperature (35-75oC) on the corrosion behavior of mild steel in the presence of plant extract was studied. Inhibition was found to increase with increase in concentration of the extract. Adsorption of extract molecules on mild steel surface obeyed the Langmuir, Temkin, Freundlich adsorption isotherms. The results obtained prove that the leaves of Polyalthia Longifolia act as a good corrosion inhibitor having efficiency of 87% at 1.5% inhibitor concentration.


  1. Refaey S.A.M., Appl Surf Sci., 240(1-4), 396-404 (2005)
  2. Quraishi M.A. and Sharma H.K., J Appl Electrochem.,35(1), 33-39 (2005)
  3. Ashassi-Sorkhabi A., Shaabani B. and Seifzadeh D., ApplSurf Sci., 239(2), 154-164 (2005)
  4. Bouklah M., Ouassini A., Hammouti B. and El Idrissi A.,Appl Surf Sci., 252(6), 2178-2185 (2006), undefined, undefined
  5. Oguzie E.E., Okolue B.N., Ebenso E.E., Onuoha G.N. andOnuchukwu A.I., Mater Chem Phy., 87(2-3), 394-401(2004)
  6. Ali Sk A., Saeed M.T. and Rahman S.U., Corros Sci.,45(2), 253-266 (2003)
  7. Quraishi M.A., Singh A., Singh V.K., Yadav D.K. andSingh A.K., Green approach to corrosion inhibition of mildsteel in hydrochloric acid and sulphuric acid solutions bythe extract of Murraya koenigii leaves, Materials Chemistryand Physics, 122(1), 114–122 (2010)
  8. Orubite K.O. and Oforka N.C., Inhibition of the corrosionof mild steel in hydrochloric acid solutions by the extractsof leaves of Nypa fruticansWurmb, Materials Letters,58(11), 1768–1772 (2004)
  9. Saratha R. and Vasudha V.G., Emblica Officinalis (IndianGooseberry) Leaves Extract as Corrosion Inhibitor for MildSteel in 1N HCl, E-Journal of Chemistry, 7(3), 677-684(2010)
  10. Okafor P.C., Ikpi M.E., Uwah I.E., Ebenso E.E., Ekpe U.J.and Umoren S.A. Inhibitory action of Phyllanthus amarusextracts on the corrosion of mild steel in acidic media,Corrosion Science, 50(8), 2310–2317 (2008)
  11. Saratha R., Savitha R. and Sivakamasundari S., JElectrochem Soc India, 52(2), 59-63 (2003)
  12. El-Etre A.Y., Appl Surf Sci., 252, 8521 (2006), undefined, undefined
  13. Abdel-Gaber A.M., Abd-El-Nabey B.A., Khamis E. andAbd-El-Khalek D.E., Desalination, 230(1-3), 314-328(2008)
  14. Ebenso E.E., Eddy N.O. and Odiongenyi A.O., Afr J PureAppl Chem., 2(11), 107-115 (2008)
  15. Noor E.A., Comparitive study on the corrosion inhibition ofmild steel by aqueous extract of Fenugreek seeds and leavesin acidic solutions, Journal of Engineering and AppliedSciences, 3(1), 23-30 (2008)
  16. Saratha R. and Vasudha V.G., Inhibition of Mild steelCorrosion in 1N H2SO4 Medium by Acid Extract ofNyctanthes arbortristis Leaves, E-Journal of Chemistry,6(4), 1003-1008 (2009)
  17. de Souza F.S. and Spinelli A., Caffeic acid as a greencorrosion inhibitor for mild steel, Corrosion Science, 51(3),642–649 (2009)
  18. Umoren S.A., Obot I.B. and Ebenso E.E., E-J. Chem., 5(2),355 (2008), undefined, undefined
  19. Stoyanova A.E., Sokolova E.I. and Raicheva S.N.,Corros.Sci., 39, 1, 595 (1997)
  20. Quraishi M.A. and Sardar R., Hector bases—a new class ofheterocyclic corrosion inhibitors for mild steel in acidsolutions, Journal of Applied Electrochemistry, 33(12),1163–1168 (2003)
  21. Muralidharan S., Quraishi M.A. and Iyer S.V.K., TheEffect of molecular structure on hydrogen permeation andthe corrosion inhibition of mild steel in acidic solutions,Corrosion Science, 37(11), 1739–1750 (1995)