3-氨基-1，2，4-三氮唑对铜的缓蚀性能和吸附行为  

Copper Corrosion Inhibition and Adsorption Behavior of 3-Amino-1,2,4-triazole

作　　者：徐群杰[1,2] 李春香[1,2] 周国定[1] 朱律均[2] 林昌健[3] 

机构地区：[1]上海电力学院环境工程系,上海200090 [2]上海大学应用化学系,上海200444 [3]厦门大学固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《物理化学学报》2009年第1期86-90,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20406009);上海市教委重点项目(06ZZ67);上海市科技攻关计划(062312045);上海市科委项目(08DZ2201400、08DZ2210800);厦门大学固体表面物理化学国家重点实验室开放课题(200512);上海市重点学科(P1304)资助

摘　　要：采用电化学和表面增强拉曼光谱(SERS)方法研究了新型环境友好型金属水处理剂3-氨基-1,2,4-三氮唑(ATA)对铜在3%NaCl溶液中的缓蚀性能和吸附行为.结果表明,ATA对铜有较好的缓蚀作用,其中ATA浓度为0.24mmol·L-1时对铜的缓蚀效率最高,为97.65%,其吸附行为符合Langmuir吸附等温式,吸附机理是典型的化学吸附.SERS表明,ATA分子通过很强的吸附于铜表面达到抑制其腐蚀的作用,是ATA-与Cu+形成配合物来阻止氯离子化合物(CuCl2-)的生成.Corrosion inhibition of copper in 3% NaCI solution by 3-amino-1,2,4-triazole （ATA） was studied in relation to the concentration of the inhibitor using electrochemical （ac impedance and dc polarization） and surface enhanced Raman spectroscopy （SERS） techniques. The results indicated that ATA was a good corrosion inhibiter for copper in a 3% NaCI solution. The inhibition efficiency was 97.65% at an ATA concentration of 20 mg·L^-1 Polarization curves showed that ATA behaved as a type of cathodical inhibitor in 3% NaCl solution. Adsorption of ATA followed Langmuir＇s adsorption isotherm and the adsorption mechanism was typical of chemisorption. SERS revealed that inhibition of copper corrosion was due to adsorption of ATA molecules on the surface of copper. SERS also confirmed that the adsorbed ATA molecules formed a complex with Cu^＋ which prevented the formation of copper chloride complexes, CuCl2^-.

关 键 词：铜 ATA 缓蚀剂 电化学 SERS 

分 类 号：TG174.42[金属学及工艺—金属表面处理]