用近稳态极化曲线方法和交流阻抗方法研究了铁在硫脲浓度低于０．１ｍｍｏｌ／Ｌ的硫酸溶液中的腐蚀行为，获得了相关的电化学参数。结果表明，在低阳极极化区，铁阳极溶解反应的速率决定步骤是一个亲核加成反应，动力学参数为Ｖ（ＴＵ）＝１，ｂａ≈６０ｍＶ。在阴极区，析氢反应的速率决定步骤是Ｈｅｇｒｏｖｓｋｙ反应，动力学参数为：Ｖ（ＴＵ）＝０．５，Ｖ（Ｈ＋）＝１．５，ｂｃ≈－８２ｍＶ。
The corrosion behavior of iron electrode in H2SO4 containing thioures（C 0．1 mmol／L）was investigated with polarization curves and EIS method．Various electrochemical parameters involved were obtained．The results showed that，the rate determining step（r．d．s）for anodic dissolution reaction of iron in low polarization region was a nucleophilic additive reaction,and the corresponding kinetics parameters were VTU=1,ba≈60mV.The r.d.s for its catbodic process was a Heyrovshky Heyrovsky reaction,and the kinetics parameters were：VTU＝－0．5，VH+=1．5，bc≈－82mV．
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