稀硫酸中丙烯基硫脲对纳米工业纯铁腐蚀作用

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2 h，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。

CORROSIVE EFFECT BY ALLYLTHIOUREA OF BULK NANOCRYSTALLINE INGOT IRON IN AMBIENT DILUTED ACIDIC SULPHATE SOLUTION

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 CPII, 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.