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Studies on the Corrosion Inhibition of Copper in Nitric Acid Solution Using Some Pharmaceutical Compounds

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Figure

Table 1. The molecular structures, names, molecular weights and molecular formulas of the investigated pharmaceutical compounds
Table 2. Inhibition efficiency of all compounds at different concentration of compounds as determined from weight loss method at 30°C
Fig.(2).Curve fitting of corrosion data for Copper in 2M HNOlog C,M.3 in presence of different concentrations of compounds tothe Temkin adsorption isotherm at 30 oC
Table 3. Inhibitor binding constant (Kads), free energy of binding (ΔG°ads), number of active sites (1/y) and later interaction parameter (a) for the compounds for the corrosion of copper  in 2 M HNO3 at 30oC
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