EFFECT OF INHIBITORS ON THE CORROSION BEHAVIOUR OF CARBON STEEL REINFORCED IN CONCRETE.
Keywords:Corrosion, Inhibitor, Concrete, Carbon steel, Vernoniaamygdalina.
AbstractThe effect of inhibitors on the corrosion behaviour of carbon steel reinforced in concretes exposed to 3.5% NaCl solution and tap water has been studied. Carbon steel was used as reinforcing bar for the experiment, calcium nitrite; sodium nitrite and bitter leaf (vernoniaamygdalina) extract were used as inhibitors. The corrosion behaviour was evaluated from potential and resistance readings using half-cell potential and concrete resistivitymeasurement techniques respectively. The results show that calcium nitrite and bitter leaf extract reduced corrosion rate in rebar compared to sodium nitrite. From the results, it is evident that the extract from vernoniaamygdalina (bitter leaf) acts as an excellent inhibitor for corrosion in reinforced concrete.
Tang, Y.M., 2012. Corrosion of steel in simulated concrete pore solution treated with calcium silicate hydrate, Construction and Building Materials 30, 516-521.
Nguyen, T. N., B, Hubbard, J and McFadden G.B., 1991. Mathematical model for the cathodic blistering of organic coatings on steel immersed in electrolytes. International Journal Coating Technology 63, 43-52.
Al-Dulaijan, S.U., Maslehuddin, M., Shameen, M., Ibrahim, M.and Al-Mehthel.,2012. Corrosion protection provided by chemical inhibitors to damaged FBEC bars. Construction& Building materials 29, 487-495.
Krolikowski, A.and Kuziak, J.,2011. Impedance study of calcium nitrite as a penetrating corrosion inhibitor for steel in concrete. Electrochimica Acta 56, 7845-785.
Soylev, T.A. and Richardson, M.G., 2008. Corrosion inhibitors for steel in concrete: State of the art report, Construction and Building Materials, 22(4),609â€“622
Loto, C.A., Loto, R.T., and Popoola, A.P.I., 2011. Effect of Nee leaf (Azadirachitaindica) extract on the corrosion inhibition of mild steel in dilute acid. International Journal of Physical Science 6, 2249-2257.
Ayeni, F.A., Madugu, I.A., Sukop,P., Ihom, A.P., Alabi, O., Okara,R., Abdulwahab, M., 2012. Effect of aqueous extracts of bitter leaf powder on the corrosion inhibition of Al-Si Alloy in 0.5M caustic soda solution, Materials Characterization and Engineering.11, 667-670.
Loto, C.A. The effect of bitter leaf on the inhibition of mild steel in HCl and H2SO4.2003. Corrosion Prevention and Control Journal. 50:43-49.
Ali, S.A., Al-Muallem,H.A., Rahman,S.U. and Saeed, M.T., 2008. Bis-isoxazolidines: A new class of corrosion inhibitors of mild steel in acidic media. Corrosion Science11, 3070-3077.
Arup, H. Korrosionscentralen, 1983. The mechanisms of the protection of steel by concrete, Ellis Horwood Ltd, Chichester.
Bertolini, L., Elsener, B., Pedeferri, P., Polder, R.,2004. Corrosion of steel in concrete, Wiley-VchVerlag GmbH & Co KGaA Weinheim .
Brown, M.C., 1999. Assessment of Commercial Corrosion Inhibiting Admixture for Reinforced Concrete,M.Sc Thesis, Virginia Polytechnic Institute and State University, USA.
Collepardi, M., Fratesi, R. and Moriconi, G.,1990. Use of nitrite salt as corrosionin hibitor admixture in reinforced concrete structures immersed in sea-water. Enco. Engineering Concrete, Spresiano,Italy
Morris, W., Vico, A., Vazquez, M. and de-Sanchez, S.R., 2002. Corrosion of reinforcing steel by means of concrete resistivity measurements. Corrosion Science.44, 81-99.
Song H.W. and Saraswathy, V., 2007. Corrosion monitoring of reinforced concrete structure.
How to Cite
Copyright of articles that appear in Jurnal Mekanikal belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions or any other reproductions of similar nature.