Corrosion Inhibition and Adsorption Characteristics of Myrianthus arboreus Leaves Extract on Copper in Sulphuric Acid Solution
G. I. Udom, G. A. Cookey, A. A. Abia
Chemical Science International Journal · pp. 1–13 · Published 3 Jul 2018
10.9734/CSJI/2018/41304Abstract
The inhibiting action of Myrianthus arboreus leaves extract on the corrosion of copper in sulphuric acid solution was assessed using weight loss method at various temperatures. It was observed that the extract inhibited the acid-induced corrosion of copper and the corrosion rate decreased in the presence of the inhibitor as compared to the blank. Inhibition efficiency was found to increase with increasing concentration of the extract and temperature. Kinetic study of the data followed a first-order reaction. Thermodynamics study revealed that the corrosion inhibition might be due to spontaneous adsorption of the leaves constituents on the metal surface. The adsorption of the extract on copper surface was found to obey Freundlich and Temkin adsorption isotherms.
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