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Inhibition Effect of Eco-Friendly Extract of Euphorbia hirta on Dissolution of Mild Steel in Hydrochoric Acid Medium
The influence of the addition of acid extract of Euphorbia hirta on the corrosion of mild steel in 1M HCL was studied by weight loss measurement. The inhibition efficiency increases with extract concentration and immersion period. The effect of temperature studied indicated that inhibition efficiency increased with temperature. The negative value of the free energy of adsorption indicates spontaneous adsorption. The inhibitor obeys Temkin adsorption isotherm. The inhibition activity is due to the adsorption of active components which are found in the Euphorbia hirta extract.
Keywords
Mild Steel, Euphorbia hirta, Plant Extract, Corrosion Inhibitor, Acid Inhibitors, Temkin Adsorption.
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