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本文应用统计力学中的系综理论,探讨了缓蚀剂在金属表面上的吸附过程遵守 Langmuir 吸附等温式情形下的吸附热(q),和遵守 Temkin 吸附等温式情形下的吸附的缓蚀剂分子间相互作用能(U)。推导出了缓蚀剂的吸附热(q)表示式,并利用该式从微观方面对缓蚀剂的吸附热进行了解释。推导了吸附的缓蚀剂分子间相互作用能(U)表示式,并从该式定义了一个能定量描述吸附的缓蚀剂分子间相互作用的常数。此外还提出了从缓蚀效率的实验数据分刖求算 q 和 U 值的方法,并用这个方法从文献上的有关实验数据求算一些缓蚀剂的 q 和 U 的值。最后从计算结果分别总结出缓蚀剂的吸附热(q)及吸附的缓蚀剂分子间相互作用能(U)与缓蚀剂的性能之间的关系,并将这个结论和从能量方而考虑得到的结论进行了比较。
In this dissertation, the ensemble theory in statistical mechanics is applied to investigate the adsorption process of corrosion inhibitor on metal surface, which obeys the adsorption heat (q) under the isothermal condition of Langmuir adsorption and the corrosion inhibitor which adheres to the adsorption under the Temkin adsorption isotherm Intermolecular interaction energy (U). The expression of the heat of adsorption (q) for the corrosion inhibitor is deduced, and the heat of adsorption of the corrosion inhibitor is explained by the formula. The expression of the intermolecular interaction energy (U) of the adsorbed corrosion inhibitor is deduced and a constant describing the intermolecular interaction of the adsorbed corrosion inhibitor is defined. In addition, a method of calculating the values of q and U from experimental data of corrosion inhibition efficiency is proposed. Using this method, the values of q and U of some corrosion inhibitors are calculated from relevant experimental data in the literature. Finally, the relationship between the heat of adsorption (q) of the corrosion inhibitor and the intermolecular interaction energy (U) of the corrosion inhibitor and the performance of the corrosion inhibitor is summarized respectively from the calculation results. Based on this conclusion, The conclusions to be considered are compared.