物理化学学报 >> 1996, Vol. 12 >> Issue (03): 252-258.doi: 10.3866/PKU.WHXB19960312

研究论文 上一篇    下一篇

铁电极上硫脲及衍生物的缓蚀作用研究

董俊华,宋光铃,曹楚南,林海潮   

  1. 中国科学院金属腐蚀与防护研究所,金属腐蚀与防护国家重点实验室,沈阳 110015
  • 收稿日期:1995-07-03 修回日期:1995-09-29 发布日期:1996-03-15
  • 通讯作者: 董俊华

Study of Corrosion Inhibition of Thiourea and it's Derivatives on Iron

Dong Jun-Hua,Song Guang-Ling,Cao Chu-Nan,Lin Hai-Chao   

  1. State Key Laboratory for Corrosion and Protection,Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang 110015
  • Received:1995-07-03 Revised:1995-09-29 Published:1996-03-15
  • Contact: Dong Jun-Hua

摘要:

用极化曲线方法测定了硫酸溶液中硫脲及其衍生物的浓度变化对铁腐蚀电化学行为的影响,获得了腐蚀电位下缓蚀剂对阴极和阳极过程的作用系数.用EHMO方法对硫脲及其衍生物的结构参数进行了量化计算,分析表明,缓蚀剂对阴极和阳极过程作用系数的大小与这些参量有密切关系.

关键词: 铁电极, 硫脲及其衍生物, 缓蚀作用, 极化曲线法, EHMO计算

Abstract:

The concentration effecs of thiourea and it’s derivatives on the corrosion behaviour of iron electrode in H2SO4 solution are measured by polarization curves. The anodic and cathodic effective coefficients of these inhibitors in Ecorr are calculated. The frontier molecular orbital energy levels and the net charge of polar atoms of these inhibitors are calculated by EHMO method. The results show that, these structure coefficients are closely related to the corrosion effective coefficients.

Key words: Iron electrode;Thiourea and its derivates;Inhibition;Polarization curves method;EHMO calculation