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Citation: XU Qun-Jie, LI Chun-Xiang, ZHOU Guo-Ding, ZHU Lv-Jun, LIN Chang-Jian. Copper Corrosion Inhibition and Adsorption Behavior of 3-Amino-1,2,4-triazole[J]. Acta Physico-Chimica Sinica, ;2009, 25(01): 86-90. doi: 10.3866/PKU.WHXB20090115 shu

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

1.
Department of Environment Engieering, Shanghai University of Electric Power, Shanghai 200090, P. R. China; Department of Chemical Engineering, Shanghai University, Shanghai 200444, P. R. China; 3State Key Laboratory of Solid Surface Physical Chemistry, Xiamen University, Xiamen 361005, Fujian Province, P. R. China

Received Date: 4 July 2008
Available Online: 30 October 2008

Corrosion inhibition of copper in 3%NaCl 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 ATAwas a od corrosion inhibiter for copper in a 3% NaCl 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, CuCl-2.
- Copper; ATA; Inhibitor; Electrochemistry; SERS
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