Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2015.1083.1092 Rhizophora mangle L. Leaf-Extract Corrosion-Mechanism on Reinforcing Steel in Concrete Immersed in Industrial/Microbial Simulating-Environment]]>OkeniyiJoshua OlusegunLotoCleophas AkintoyePopoolaAbimbola Patricia Idowu82015158Test-data from electrochemical monitoring methods were obtained from Rhizophora mangle L. leaf-extract admixed steel-reinforced concretes for detailing mechanism of the extract on steel-rebar corrosion in 0.5 M H2SO4 (simulating industrial/microbial environment). These electrochemical test-measurements, including corrosion potential, corrosion current and corrosion rate, were subjected to the analyses of probability distributions as per ASTM G16-95 R05 through the Kolmogorov-Smirnov goodness-of-fit test-statistics. Results showed that corrosion rate exhibited correlations with function of the natural plant-extract concentration and compact series of the inverse electrochemical noise resistance; the ratio of standard deviations of corrosion potential and corrosion current. Both the experimental and the correlated-prediction model identified Rhizophora mangle L. leaf-extract admixture concentrations that exhibited inhibition efficiency performance of η>70% on steel-rebar corrosion in the acidic test-medium. The adsorption isotherm modelling of the experimental and the predicted electrochemical test-results exhibited good agreements by following the Langmuir and Flory-Huggins isotherm fittings. In addition, the study identified physisorption as the prevalent corrosion-protection mechanism of the steel-rebar by the plant extract through both of the experimental and the correlated-prediction models of adsorption isotherm analyses.]]>Ajayi, O.O., R.O. Fagbenle, J. Katende, S.A. Aasa and J.O. Okeniyi,20132013Alagbe, M., L.E. Umoru, A.A. Afonja and O.E. Olorunniwo,2006611421147ASTM.,20052005Birbilis, N. and B.W. Cherry,200556237243Broomfield, J.P.,2002Pages: 264Pages: 264Bungey, J.H., S.G. Millard and M.G. Grantham,20064th Edn.,Pages: 352Pages: 352Coffey, R., S. Dorai-Raj, V. O'Flaherty, M. Cormican and E. Cummins,201319232253De Muynck, W., N. De Belie and W. Verstraete,200931163170Eddy, N.O. and P.A.P. Mamza,2009Azadirachta indica on the corrosion of mild steel in H2SO4.]]>27443456Eden, D.A.,20002000pp: 1227-1238pp: 1227-1238Foo, K.Y. and B.H. Hameed,2010156210Fu, J.J., S.N. Li, L.H. Cao, Y. Wang, L.H. Yan and L.D. Lu,201045979986Gerengi, H., Y. Kocak, A. Jazdzewska, M. Kurtay and H. Durgun,201349471477Gulikers, J.,201014441466Hameurlaine, S., N. Gherraf, A. Benmnine and A. Zellagui,2010Atractylis serratuloides on the corrosion of mild steel in H2SO4 medium.]]>2819825Haynie, F.H.,20052005pp: 83-88pp: 83-88Hewayde, E., M.L. Nehdi, E. Allouche and G. Nakhla,20071602535Jaggi, S., H. Bohni and B. Elsener,20012001Jiang, G. and W. Jin,20131268376840Kelly, R.G., M.E. Inman and J.L. Hudson,19961996pp: 101-113pp: 101-113Mangai, S.A. and S. Ravi,2013Trichodesma indicum (Linn) R. Br. on C38 steel in 1 M HCl medium.]]>2013McCarter, W.J. and O. Vennesland,200418351358Muralidharan, S., V. Saraswathy, S.P.M. Nima and N. Palaniswamy,200486298306Okeniyi, J.O.,201410H18N2Na2O10 inhibition and adsorption mechanism on concrete steel-reinforcement corrosion in corrosive environments.]]>2014Okeniyi, J.O., O.A. Omotosho, O.O. Ajayi and C.A. Loto,201450448456Okeniyi, J.O., C.A. Loto and A.P. Popoola,2014Phyllanthus muellerianus on the corrosion of concrete steel-reinforcement in industrial/microbial simulating-environment.]]>32199211Okeniyi, J.O., C.A. Loto and A.P.I. Popoola,2014Anthocleista djalonensis on steel-reinforcement corrosion in concrete immersed in saline/marine simulating-environment.]]>67959969Okeniyi, J.O., I.J. Ambrose, S.O. Okpala, O.M. Omoniyi, I.O. Oladele, C.A. Loto and P.A.I. Popoola,20146H15NO3 effectiveness on concrete steel-rebar corrosion.]]>39731764Okeniyi, J.O., C.A. Loto and A.P.I. Popoola,2014Morinda lucida effects on steel-reinforced concrete in 3.5% NaCl: Implications for corrosion-protection of wind-energy structures in saline/marine environments.]]>50421428Okeniyi, J.O., I.O. Oladele, I.J. Ambrose, S.O. Okpala, O.M. Omoniyi, C.A. Loto and A.P.I. Popoola,20132Cr2O7 concentrations: Implications for conflicting reports on inhibitor effectiveness.]]>2036973714Okeniyi, J.O., O.M. Omoniyi, S.O. Okpala, C.A. Loto and A.P.I. Popoola,201317398416Okeniyi, J.O., I.J. Ambrose, I.O. Oladele, C.A. Loto and P.A.I. Popoola,201381075810771Okeniyi, J.O. and E.T. Okeniyi,2012®: Implication for Microsoft Excel® library function.]]>8217271741Omotosho, O.A., C.A. Loto, O.O. Ajayi, J.O. Okeniyi and A.P.I. Popoola,2014921712185Patel, N.S., S. Jauhariand, G.N. Mehta, S.S. Al-Deyab, I. Warad and B. Hammouti,2013826352655Perera, L.M.S., A. Escobar, C. Souccar, M.A. Remigio and B. Mancebo,2010Rhizophora mangle L., as a potential antiulcerogenicdrug: Chemical composition of active extract.]]>25663Roberge, P.R.,20032003pp: 425-429pp: 425-429Sastri, V.S.,2011Pages: 328Pages: 328Shing, C.K., C.M.L. Wu, J.W.J. Chen, C.S. Yuen and R.Y. C. Tsui,201219816Song, H.W. and V. Saraswathy,20072128Soylev, T.A., C. McNally and M. Richardson,200737972977Tang, Y., G. Zhang and Y. Zuo,201228327332Tommaselli, M.A.G., N.A. Mariano and S.E. Kuri,200923328333Yadav, M., S. Kumar and P.N. Yadav,20132013Zamora, M.A.B., D.N. Mendoza, H.H. Zamora and F.A. Calderon,200927237246ASTM.,20052005ASTM.,20052005ASTM.,20052005