Abstract
The effect of synergistic corrosion inhibition efficiency of Azadirachta indica gum with halides (KCl, KBr and KI) on mild steel in 1 mol L−1 HCl was studied using conventional weight loss and electrochemical studies. The temperature (303–328 ± 1 K) and time (1, 2, 3, 4, 6 and 24 h) effect on the inhibition of corrosion has also been tested. The inhibition efficiency of gum exudates of Azadirachta indica considerably increased with the presence of halide ions at all temperature ranges studied. Corrosion kinetic parameters and thermodynamic adsorption parameters were calculated and discussed in detail. The mode of adsorption of inhibitor on the mild steel surface was examined by FT-IR spectroscopy.
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