摘要
用光电子能谱 (XPS)、红外光谱 (IR)和扫描隧道显微镜 (STM ) ,对Cu在含NaCl的 2 -琉基苯并唑(MBO)溶液中处理后 ,其表面所形成的缓蚀膜进行了研究 .缓蚀膜的Cu2 p3/2 结合能值为 932 .3eV ,在Cu2 p3/2 和Cu2p1/2 之间没有“卫星峰”存在 ,且俄歇峰CuLMM的结合能为 337.6eV ,表现了典型的一价Cu化合物的特征 .该缓蚀膜的红外光谱与MBO的一价Cu的合成化合物的红外谱图相一致 .在形成缓蚀膜前后 ,N1s和S2 p的结合能变化显著 ,表明MBO分子可能通过S和N原于与一价铜离子键合的 .原位的STM表明 ,Cl-的存在可使MBO在Cu表面形成致密的三维膜 .对MBO缓蚀膜的形成机理进行了分析 ,解释了在MBO缓蚀膜形成过程中Cu腐蚀电位的变化 .
The characteristic of the inhibition film formed on copper in 1mmol/L MBO(Mercaptobenzoxazole) solution containing 3% NaCl was studied by XPS,IR and STM.For the XPS of the inhibition film,the Cu2p\-\{3/2\} binding energy and CuLLM kinetic energy were 932.3 and 916.0 eV respectively,and the satellite peak at the high binding energy side of the Cu2p\-\{3/2\} was not obsevred.These indicated that the copper element in the inhibition film is cuprous.The formation of the inhibitlon film by MBO caused relatively shift of the binding energies of N1s and S2p,demonstrated that N and S atoms could have an important role in the formation of the inhibition film.The IR spectral characteristic of the film is fitly consistent with the reference compound MBOCu(I),but different from the MBOCu(Ⅱ) to some extent.In the presence of chloride,the formation of a compact three-dimensional film could be observed by STM.It is concluded that MBO reacted with the cuprous species from the corrosion process,and produced a water-insoluble cuprous complex to form the inhibition film and to retard the corrosion of copper.The corresponding inhibition mechanism was also discussed.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2001年第1期12-15,共4页
Corrosion Science and Protection Technology
基金
国家重点基础研究专项经费资助!(G19990 6 5 0 )
辽宁省自然科学基金!(96 2 14 2 )资助项目
