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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pan American Materials Congress: Materials for Infrastructure
Presentation Title Cassia Fistula Leaf-extract Effect on Corrosion-inhibition of Stainless-steel in 0.5 M HCl
Author(s) Olugbenga Adeshola Omotosho, Joshua Olusegun Okeniyi, Cleophas Akintoye Loto, Abimbola Patricia Idowu Popoola, Omokolade Bamidele Ajibola, Adebanji Samuel Ogbiye
On-Site Speaker (Planned) Olugbenga Adeshola Omotosho
Abstract Scope This paper investigates Cassia fistula leaf-extract effects on the corrosion-inhibition of stainless-steel in 0.5 M HCl. Measurements of corrosion rate were obtained through linear sweep voltametry (LSV) technique, at the ambient temperature of 28C from stainless-steel specimens immersed in the acidic medium, containing differ-ent Cassia fistula leaf-extract concentrations. Results showed that inhibition effectiveness on stainless-steel corrosion increases with increasing concentration of the leaf-extract. The 10 g/L Cassia fistula leaf-extract, the highest concentration of the leaf-extract employed in the study, exhibited optimal inhibition efficiency η = 88.46% on the stainless-steel metal. Adsorption isotherm modelling shows that the experimental data followed the Flory-Huggins isotherm with excellent model efficiency, r2 = 90.27%, and the Langmuir model with very good model efficiency, r2 = 78.83%. Other isotherm parameters indicate favourable adsorption and suggest phy-sisorption as the prevalent mechanism of corrosion-protection by the leaf-extract on stainless-steel in the acidic chloride environment.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)


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Cassia Fistula Leaf-extract Effect on Corrosion-inhibition of Stainless-steel in 0.5 M HCl
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