CORROSION INHIBITOR ALOE VERA – NICKEL SYSTEM CONTROLLING THE CORROSION OF CARBON STEEL IN RAIN WATER

J Wilson Sahayraj, C Kumar, S Rajendran, S. K. Selvaraj, A. Peter Pascal Regis, R. Mohan

Abstract


The  corrosion  inhibition  efficiency  of  an  aqueous  extract  of  Aloe  Vera  (AV)  in  controlling  the corrosion of carbon steel rain water   in absence and presence of with Ni2+ has been studied by weight  loss method. Weight Loss study reveals that the formulation consisting of 5ml of AV and 50 ppm of Ni2+ has 98% inhibition efficiency. The results of polarisation study shows that the formulation  function controls the cathodic reaction predominantly. The AC impedance spectra reveal that a protective film formed on the metal surface. The UV – visible absorption spectra indicates the possibility of formation of Fe2+ - AV complex and also Ni2+- AV complex in the solution. FTIR spectrum reveal that the protective film consists of Fe2+-AV complex and Ni (OH)2.

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DOI: http://dx.doi.org/10.17628/ecb.2013.2.315-319

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