Determination of the Corrosion Inhibition Efficiency of Senna Alata on Mild Steel In H2so4 Acid Solution

ABSTRACT

The inhibition efficiency of ethanolic extract of Senna alata on the corrosion of mild steel in sulphuric acid solution was studied using gravimetric (at 30⁰C) and gasometric (at 30⁰C, 45⁰C and 60⁰C) methods. The results obtained show that the inhibitive properties of Senna alata extract was found to increase with increase in the extract concentrations and decrease with increase in temperature. The extract acted as a good inhibitor at 30⁰C, 45⁰C and 60⁰C but have a better efficiency at 30⁰C than at 45⁰C. A slight increase in efficiency was observed from 45⁰C to 60⁰C, this is due to the chemical adsorption of the extract on the metal surface. The adsorption of Senna alata extract obeys Langmuir adsorption isotherm.

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WSN 208 (2025) 1-18

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