稀硫酸中丙烯基硫脲对纳米工业纯铁腐蚀作用

中国腐蚀与防护学报, 2010, 30(6): 433-436.

稀硫酸中丙烯基硫脲对纳米工业纯铁腐蚀作用

Engineering, Dalian Jiaotong University, Dalian 1160282. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 1100163. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016>

基金项目: 国家自然科学基金项目(50501023)资助

关键词：块体纳米晶工业纯铁(BNII) , allyl-thiourea (ATU) , acidic sulphate solution

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

SHEN Changbin , YANG Huaiyu , WANG Shenggang , LONG Kang , WANG Fuhui

Keywords： bulk nanocrystalline ingot iron (BNIN) , 丙烯基硫脲(ATU) , 硫酸

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。

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.

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