【摘要】 本文提出一个在盐酸液中的吡啶及甲基吡啶对铁的缓蚀模型,按此模型利用自由能最小原理和单分子层吸附模型,以及各种缓蚀粒子的有效吸附直径等推导出缓蚀率E的方程为:lnE=AlnC+BpK_b+D.根据8种缓蚀剂各自4种浓度（C）下的E的实验值和相应的pK_b值,用多元回归法求得此方程的A=0.5617;B=-0.0464;D=0.6087;相关系数r=0.998;F值为3845。按R=1/（1-E）式,求得缓蚀效果R的方程为:R=1/[1-exp（0.5617lnC-0.0464pK_b+0.6087）]。用此方程所得的32个R计算值与其实验值很符合,其平均相对误差为3.6%。更多还原

【Abstract】 An inhibition model for protecting iron against corrosion in HC1 solution by pyridine and methyl pyridines is proposed. Based on the model composed of six reactions, an equation for the inhibition coefficient E, namely, lnE=AlnC + BpKb + D, has been derived using the principle of the minimal free energy, the model of adsopption of monomolecular layer and the effective diameter of inhibition particles adsorped onto the iron surface. From the experimental values of E for each of the eight inhibitors in four different concentrations (C) and the values of pKb of the eight inhibitors, A = 0.5617, B =- 0.046 4and D = 0.6087 together with the correlation coefficient r = 0.998 and F = 3845 have been obtained with the multiple regression method. According to the expression R=1/(1- E), an equation for the inhibition effect, R- 1/[1- exp(0.5617lnC- 0.046 4pKb + 0.6087)] has been obtained too. The 32 R’s calculated with this equation are all in good agreement with experimental data, the average relative error being 3.6%.更多还原