A novel corrosion inhibitor, namely $$N'$$N′-[(4-methyl-1H-imidazole-5-yl)methylidene]-2-(naphthalen-2-yloxy) acetohydrazide (IMNH), has been synthesized and characterized by $$^{1}$$1H NMR and FTIR spectroscopic techniques. The anticorrosion behaviour of IMNH on mild steel in 1 M hydrochloric acid (HCl) medium was studied by potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) techniques. The percentage inhibition efficiency of IMNH increased with increase in its concentration and temperature. The adsorption of IMNH followed chemisorption and obeyed Langmuir’s adsorption isotherm. PDP study revealed that IMNH functioned as a mixed type inhibitor. Theoretical study of the adsorption behaviour of this inhibitor was carried out by quantum chemical calculations using density functional theory (DFT). Scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy-dispersive X-ray spectroscopy (EDX) studies confirmed the formation of a protective film of IMNH on the mild steel surface.

中文翻译：

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盐酸介质中一种新型酰肼衍生物在低碳钢上的合成、表征及防腐性能

合成了一种新型缓蚀剂 $$N'$$N'-[(4-methyl-1H-imidazole-5-yl)methylidene]-2-(naphthalen-2-yloxy) acetohydrazide (IMNH)通过 $$^{1}$$1H NMR 和 FTIR 光谱技术表征。通过动电位极化 (PDP) 和电化学阻抗谱 (EIS) 技术研究了 IMNH 在 1 M 盐酸 (HCl) 介质中对低碳钢的防腐行为。IMNH 的抑制效率百分比随着其浓度和温度的增加而增加。IMNH 的吸附遵循化学吸附并服从朗缪尔吸附等温线。PDP 研究表明 IMNH 起到混合型抑制剂的作用。该抑制剂的吸附行为的理论研究是通过使用密度泛函理论 (DFT) 的量子化学计算进行的。