中文摘要：

在室温0.1 mol/L H2SO4＋0.25 mol/L Na2SO4溶液中,研究了添加不同浓度丙烯基硫脲（ATU）对块体纳米晶工业纯铁（BNII）（通过严重塑性变形获得）和普通工业纯铁（CPII）电化学腐蚀行为的影响。当浸泡5 min后,CPII的Nyquist谱图上出现感抗弧,而BNII的Nyquist谱图为单阻抗谱。随着时间延长至2h,BNII的Nyquist谱图上出现两个时间常数;CPII的阻抗复平面上出现一圆心下偏的单阻抗谱。

英文摘要：

In the corrosive solution 0.1 mol/L H2SO4＋0.25 mol/L Na2SO4,the effect of allyl-thiourea（ATU） on the corrosion behaviors of bulk nanocrystalline ingot iron（BNII） was studied.Inhibited by ATU at ambient temperature,for CPU,when immersion time as short as 5 min,an inductive loop appeared at different concentrations at the Nyquist complex planes;for BNII,only a simple capacitance loop appeared in the Nyquist plot at the same period.With the elongation of the immersion time,for BNII,two time constants appeared in the Nyquist plot;For CPII,the impedance spectrum shows a slightly depressed semicircular shape.