Corrosion Protection of Mild Steel by Eco-Friendly Paint Formulated with Mangifera Indica Leaves Extract

Abstract:

The corrosion inhibition on mild steel by eco-friendly paint produced from Mangifera indica leaves extract was carried out using the weight loss and potentiodynamic polarization methods. Central Composite Design (CCD) in Response Surface Methodology (RSM) was used for the design of experiment for the determination of corrosion inhibition efficiency, corrosion rate, and statistical analysis of the experimental results. Corrosion protection paint was formulated, and its efficacy was tested in a hydrochloric acid medium. The surface morphology of the mild steel sample was studied using the scanning electron microscopy (SEM). The corrosion inhibition efficiency of the paint for weight loss and potentiodynamic polarization methods is 83.68 and 99.49 %, respectively. The activation energy for corrosion process with coated mild steel is 26.47 J/mol K, which is higher than the value of 16.89 J/mol K obtained for uncoated mild steel, indicating that the adsorption process is physisorption. The enthalpy change is 23.96 kJ/mol. The positive value indicates that heat is absorbed from the environment. The entropy change is-180 J/mol K, implying that the activation energy complex is the rate determining step representing association rather than dissociation. Langmuir adsorption isotherm was found to be the best fit model. It was concluded from the study that the formulated paint has a high potential for commercialisation and industrial applications.

• Periodical: Advanced Materials Research (Volume 1189)
• Pages: 63-83
• DOI: https://doi.org/10.4028/p-LX2Uy9
• Online since: March 2026
• Authors: Kabiru Tope Amusa, Ayodele Abeeb Daniyan, Oludare Johnson Odejobi*
• Keywords: Adsorption Isotherm, Corrosion Inhibition, Eco-Friendly Paint, Leave Extract, Mild Steel

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