物理化学学报 >> 2001, Vol. 17 >> Issue (07): 604-608.doi: 10.3866/PKU.WHXB20010706

研究论文 上一篇    下一篇

AMT在青铜-柠檬酸体系中的缓蚀行为及其机理

傅海涛;李瑛;魏无际;朱一帆   

  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 110016;南京化工大学 材料科学与工程系, 南京 210009
  • 收稿日期:2000-11-09 修回日期:2001-03-12 发布日期:2001-07-15
  • 通讯作者: 李瑛 E-mail:liying@icpm.syb.ac.cn

The Inhibition of AMT on Bronze Corrosion in 5% Citric Acid

Fu Hai-Tao;Li Ying;Wei Wu-Ji;Zhu Yi-Fan   

  1. State Key Laboratory for Corrosion and Protection,Institute of Corrosion and P rotection of Metal,the Chinese Academy of Sciences, Shenyang 110016;Nanjing University of Chemical Technology, Nanjing 210009
  • Received:2000-11-09 Revised:2001-03-12 Published:2001-07-15
  • Contact: Li Ying E-mail:liying@icpm.syb.ac.cn

摘要: 用电化学方法、红外反射光谱法研究AMT(2-氨基-5-巯基-1,3,4-噻二唑)在青铜 -5%柠檬酸体系中的缓蚀行为和机理.结果表明,AMT能有效抑制青铜在柠檬酸中的腐蚀,属 混合型缓蚀剂.红外反射光谱表明,膜的最外层结构为Cu(Ⅰ)AMT,AMT中-NH2参与一价铜的络 合反应,环上离氨基最近的N参与配位. 缓蚀机理归因于成相膜的形成.

关键词: 2-氨基-5-巯基-1,3,4-噻二唑 (AMT), 青铜, 柠檬酸, 缓蚀剂, 红外光谱

Abstract: 2-amino-5-mercapto-1,3,4-thiadiazole is a new inhibitor to resist the corrosion of copper and its alloys.The corrosion behavior of bronze in the presence of AMT has been investigated in 5% citric acid.Electrochemical potenti ostatic polarization method and electrochemical impedance spectroscopy (EIS) wer e applied to analysis the effect of the organic compound on the corrosion inhibi tion of bronze.The results showed that AMT could greatly retard the corrosion of bronze in citric acid,which was attributed mainly to the protective film formed by AMT.Fourier transform infrared (FTIR) was used to characterize the surface f ilm.A polymeric Cu(Ⅰ)-inhibitor complex exhibiting strong corrosion inhibition that totally covered the bronze surface was identified.AMT behaves as bidentate ligand through the aminic nitrogen atom and the closed ring nitrogen in these c omplexes.

Key words: 2-amino-5-mercapto-1,3,4-thiadiazole (AMT), Bronze, Citric acid,  Inhibitor, FTIR