Mirabilis Jalapa flowers extract as corrosion inhibitor for the mild steel corrosion in IM HCl
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Date
2015
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Abstract
The corrosion inhibition efficiency o f the acid extract o f mirabilis jalapa flowers fo r the dissolution
o f mild steel in IM HCl was studied at different concentrations o f the extract, various immersion periods and at
certain elevated temperatures. Data were fit into Langmuir and Temkin isotherms. Activation energy (Efi,
Entropy change (AS), Enthalpy change (AH) and Heat o f adsorption (Q„,tJ were obtained from the Arrhenius
plot. Nyquist and Bode plots were obtained to discuss the mode o f inhibition and the inhibition efficiency was
calculated from the electrochemical kinetic parameters.