Inhibition of Steel-Rebar Corrosion in Industrial/Microbial Simulating-Environment by Morinda lucida

Abstract:

This paper studies inhibition of steel-rebar corrosion in concrete immersed in 0.5 M H₂SO₄, simulating industrial/microbial environment by the leaf extract of Morinda lucida. Electrochemical monitoring methods were employed for testing different concentrations of the leaf extract admixed in duplicated specimens of steel-reinforced concrete slabs immersed in the acidic test-system. Statistical analyses as per ASTM G16-95 R04 of the experimental results showed that effectiveness of Morinda lucida at inhibiting concrete steel-rebar corrosion increased with the concentration of the admixture. 0.4167% Morinda lucida, per weight of cement, was identified with optimum inhibition efficiency η = 98.78±0.34% followed in effectiveness by 0.3333% Morinda lucida with η = 93.20±1.76% at inhibiting steel-rebar corrosion in the corrosive test-environment.

• Periodical: Solid State Phenomena (Volume 227)
• Pages: 281-285
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.227.281
• Online since: January 2015
• Authors: Joshua Olusegun Okeniyi*, Cleophas Akinloto Loto, Abimbola Patricia I. Popoola
• Keywords: Corrosion, Industrial/Microbial Environment, Inhibition Efficiency, Inhibitor, Steel Reinforcing Bar Corrosion

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