铜表面吡咯烷二硫代氨基甲酸铵自组装膜的拉曼光谱和缓蚀作用.pdf

第20卷第11期
中国有色金属学报
2010年11月
Vol 20 No,11
The Chinese Journal of Nonferrous Metals
Nov.2010
文章编号:1004-0609(2010)11-2213-08
铜表面叱咯烷二硫代氨基甲酸铵自组装膜的
拉曼光谱和绥蚀作用
岳忠文2,廖强强,2,王作华3,李义久3,陈亚琼,2,葛红花,2
(1.上海电力学院上海高校电力腐蚀控制与成用电化学重点买验室,上海200090
2.上海电力学院上海热交换系统节能工程技术研究中心,上海200090
3.同济大学化学系,上海200092
摘要:应用表面增强拉曼光谱(SERS)和电化学方法,对铜电极表面吡咯烷二硫代氨基甲酸铵( APDTC)的自组
装单层结构、缓蚀性能和吸附行为进行研究。SERS光谱表明: APDTC分子通过硫原子垂直吸附在铜表面形成
APDTC自组装单分子膜( APDTC SAMS)。交流阻抗和极化曲线实验表明:在3%NaC(质量分数)溶液中 APDTC
SAMs对铜貝有很好的缓蚀作用,最高缓蚀效率可达98%; APDTC的吸附行为符合 Langmuir吸附等温式,吸附
机理是介于化学吸附和物理吸附之间的一种吸附。
关键词:铜;吡咯烷二硫代氨基甲酸铵;拉曼光谱;自组装单分子膜;缓蚀;吸附
中图分类号:0646.6
文献标志码:A
Raman spectrum and inhibition effect of self-assembled monolayers of
ammonium pyrrolidine dithiocarbamate on copper surface
YUE Zhong-wen 2, LIAO Qiang-qiang, WANG Zu-hua LI Yi-jiu CHFN Ya-qiong, GE Hong-hua
(1. Key Laboratory of Shanghai Colleges and Universities for Electric Power Corrosion Control and
Applied Electrochemistry, Shanghai University of Electric Power, Shanghai 200090, China
2. Shanghai Engineering Research Center of Energy-saving in Heat Exchange Systems
Shanghai University of Electric Power, Shanghai 200090, China
Department of Chemistry, Tongji University, Shanghai 200092, China)
Abstract: The structure, corrosion inhibition and adsorption behavior of ammonium pyrrolidine dithiocarbamate
(APDTC) self-assembled monolayers (SAMS) on a copper surface were investigated by surface-enhanced Raman
attering spectroscopy (ERS )and electrochemical methods. The results of SERS experiment show that APDTC SAM
is adsorbed on the copper surface by its S atoms with perpendicular orientation. The AC impedance and DC polarization
results indicate that APDTC SAMS have good corrosion inhibition effects on copper in a 3% NACI solution and its
maximum inhibition efficiency can reach 98%. Adsorption of the APDTC SAMS is found to follow the Langmuir
adsorption isotherm and the mechanism consists of a mixed adsorption between chemisorption and physisorption
Key words: copper; ammonium pyrrolidine dithiocarbamate; Raman spectrum; self-assembled monolayer; corrosion
inhibition, adsorption
自组装膜技术(SAMs)是20世纪80年代初期发展起来的较为活跃的界面化学和材料化学的前沿领域
基金项目:上海市重点学科建设资助项目(Pl1304);上海高校电力腐蚀控制与应用电化学重点实验室开放基金资助项日(9KLSO01);上海热交换系
节能工程技术研究中心开放基金资助项目( O9SERC03;上海市科委资助项目(O8DZ210800
收稿日期:2009-12-13;修订日期:2010-04-22
通信作者:壓强强;副教授,博士;电话:021-65700719F-mail:aog971 a yahoo.corn.cn