The corrosion protection performance of new synthesized ionic liquids derived from pyridine namely: 1-ethyl-4-(2-(4-fluorobenzylidene)hydrazinecarbonyl)pyridin-1-ium iodide (IPyrC₂H₅), and 1-butyl-4-(2-(4-fluorobenzylidene)hydrazinecarbonyl)pyridin-1-ium iodide (IPyr-C₄H₉) was investigated against mild steel corrosion in 1 M HCl by using electrochemical methods. PDP experiments revealed that the IPyr-C₂H₅ and IPyr-C₄H₉ behaved as anodic type inhibitors. Electrochemical impedance spectroscopy (EIS) measurements indicated that both compounds could inhibit the corrosion of mild steel with an inhibition efficiency of 88.8% for IPyr-C₂H₅ and 92.3% for IPyr-C₄H₉ at optimum concentration after 30 min of immersion. These compounds can be adsorbed on the mild steel surface through physical and chemical bonds, according to Langmuir isotherm model. DFT method was employed to correlate the molecular structure of pyridinium-derived ionic liquids and their experimental inhibition efficiencies. Molecular dynamics (MD) studies revealed higher interaction energy for inhibitor IPyr-C₄H₉ compared to IPyr-C₂H₅. The radial distribution function (RDF) indicated chemical adsorption of the inhibitors on the metallic surface.

吡啶衍生的新型合成离子液体的腐蚀防护性能：1-乙基-4-（2-（4-（氟代亚苄基）肼羰基）吡啶-1-碘化碘（IPyrC ₂ H ₅）和1-丁基-4-使用电化学方法研究了（2-（4-氟亚苄基）肼羰基）吡啶-1-碘鎓盐（IPyr-C ₄ H ₉）在1 M HCl中对弱钢腐蚀的影响。PDP实验表明IPyr-C ₂ H ₅和IPyr-C ₄ H ₉表现为阳极型抑制剂。电化学阻抗谱（EIS）测量表明，两种化合物均能抑制低碳钢的腐蚀，在浸泡30分钟后的最佳浓度下，对IPyr-C ₂ H ₅的抑制效率为88.8％，对IPyr-C ₄ H ₉的抑制效率为92.3％。。根据Langmuir等温模型，这些化合物可以通过物理和化学键吸附在低碳钢表面上。采用DFT方法将吡啶鎓衍生的离子液体的分子结构与它们的实验抑制效率相关联。分子动力学（MD）研究表明，与IPyr-C相比，抑制剂IPyr-C ₄ H _9的相互作用能更高₂ H ₅。径向分布函数（RDF）表示抑制剂在金属表面的化学吸附。