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合成了经过选择的数种C11～C18碳原子脂肪酸氨基硫脲化合物 ,并通过失重法和动电位极化法对其在 1N盐酸 (HCl)和 1N硫酸 (H2 SO4 )条件下作为低碳钢 (MS)缓蚀剂的可行性进行了评价。计算了所有这些脂肪酸氨基硫脲化合物的吸附自由能以及吸附活化能的数值 ,并以此为依据考察了其腐蚀抑制机理。室温条件下动电位极化研究表明 :所有这类化合物都抑制腐蚀反应 ,而且发现在这两种酸性溶液中所有这些脂肪酸氨基硫脲化合物在低碳钢表面的吸附都符合Temkin吸附等温线。这些化合物在两种酸性溶液中都给出了良好的缓蚀率 (IE) ,并发现这些化合物的IE数值随化合物的特性和浓度、溶液温度、浸泡时间以及酸的特性发生变化。文中还应用电化学阻抗频谱进行腐蚀抑制机理的研究。
Several selected C11 ~ C18 fatty acid thiosemicarbazide compounds were synthesized and characterized as low carbon steel (HC1) and 1N sulfuric acid (H2 SO4) by weight loss and potentiodynamic polarization MS) corrosion inhibitor was evaluated. The adsorption free energy and adsorption activation energy of all these fatty thiosemicarbazones were calculated. Based on this, the mechanism of corrosion inhibition was also investigated. Potentiodynamic polarization studies at room temperature showed that all of these compounds inhibited the corrosion reaction and that all of these fatty acid thiosemicarbazone compounds adsorbed on the mild steel surface in both acid solutions were found to meet the Temkin adsorption isotherm. These compounds gave good corrosion inhibition (IE) in both acidic solutions and found that the IE values of these compounds varied with compound identity and concentration, solution temperature, soaking time, and acid characteristics. In the paper, electrochemical impedance spectroscopy is also used to study the corrosion inhibition mechanism.