Abstract Phenanthroline derivative, 2-(6-methylpyridin-2-yl)-1H-imidazo[4,5-f][1,10] phenanthroline (MIP) was synthesized and characterized by elemental analysis, FT-IR, 1 H NMR, 13 C NMR, and single crystal X-ray diffraction study. MIP was evaluated as corrosion inhibitor for mild steel in 0.5 M H 2 SO 4 solution using gravimetric and UV–Visible spectrophotometric methods at 303–333 K. Results obtained show that MIP acts as inhibitor for mild steel in H 2 SO 4 solution. The inhibition efficiency was found to increase with increase in MIP concentration but decreased with temperature. Activation parameters and Gibbs free energy for the adsorption process using statistical physics were calculated and discussed. The UV–Visible absorption spectra of the solution containing the inhibitor after the immersion of mild steel specimen indicate the formation of a MIP-Fe complex.

中文翻译：

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硫酸中2-(6-甲基吡啶-2-基)-1H-咪唑并[4,5-f][1,10]菲咯啉对低碳钢的合成、表征及缓蚀效果

摘要 合成了菲咯啉衍生物，2-(6-甲基吡啶-2-基)-1H-咪唑并[4,5-f][1,10]菲咯啉(MIP)，并通过元素分析、FT-IR、1 H NMR进行表征。 、 13 C NMR 和单晶 X 射线衍射研究。在 0.5 MH 2 SO 4 溶液中使用重量分析法和紫外-可见分光光度法在 303-333 K 下评估 MIP 作为低碳钢的缓蚀剂。获得的结果表明 MIP 在 H 2 SO 4 溶液中作为低碳钢的缓蚀剂。发现抑制效率随着 MIP 浓度的增加而增加，但随着温度的增加而降低。使用统计物理学计算和讨论了吸附过程的活化参数和吉布斯自由能。