应用化学 ›› 1992, Vol. 0 ›› Issue (3): 63-65.

• 研究简报 • 上一篇    下一篇

吸附型缓蚀剂的抑制系数

邹津耘, 杨宝和, 旷富贵, 蒋嘉   

  1. 武汉大学环境科学系, 武汉 430072
  • 收稿日期:1991-02-11 修回日期:1991-08-01 出版日期:1992-06-10 发布日期:1992-06-10

THE INHIBITION COEFFICIENT OF ADSORPTION INHIBITOR

Zou Jinyun, Yang Baohe, Kuang Fugui, Jiang Jia   

  1. Department of Environmental Science, Wuhan University, Wuhan 430072
  • Received:1991-02-11 Revised:1991-08-01 Published:1992-06-10 Online:1992-06-10

摘要: 缓蚀剂的抑制系数定义为:γ=V0/V(1) 式中V、V0分别为金属在有、无缓蚀剂介质中的腐蚀速度。Antropov等研究过许多种吸附型缓蚀剂[1],发现在一定浓度范围内,这类缓蚀剂对铁的酸腐蚀的抑制系数γi与浓度之间存在简单的函数关系:logγi= αiilogCi(2)式中常数αi和βi决定于缓蚀剂的结构和性质。本文研究了几种吸附型缓蚀剂对酸性介质中20°钢腐蚀的抑制系数与其浓度之间的关系,探讨了混合缓蚀剂中单一组分浓度及其抑制系数对总抑制系数的影响。

关键词: 钢, 缓蚀作用, 喹啉, 硫脲, 溴化苄基三苯基鏻

Abstract: The corrosion inhibition of quinoline, thiourea and benzyltriphenyl phosphonium bromide for carbon steel in acid medium have been investigated by weight loss method.The following relationship between inhibition coefficient γi (ratio of the corrosion velocity without inhibitor to that with inhibitor) and concentration of inhibitor (Ci) was found:logγi= αiilogCi In the case of mixed inhibitor systems the over all inhibition coeffiieient γs: can be expressed as:logγs= αsslogC1 (concentration of the second inhibifor=constant) and logγs=logγ11+blogγ2(b=βs1). When b>1, the inhibitors showed a synergistic inhibition effect.

Key words: corrosion cabon steel, inhibition, quinoline, thiourea, benzyltriphenyl phosphonium bromide