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Arginine self-assembled monolayers against copper corrosion and synergistic effect of iodide ion |
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| Authors: | Da-Quan Zhang Xian-Ming He Qi-Rui Cai Li-Xin Gao Gui Soon Kim |
| Affiliation: | (1) College of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People’s Republic of China;(2) Department of Environmental Engineering, Shanghai University of Electric Power, Pinliang Road 2103, Shanghai, 200090, People’s Republic of China;(3) Department of Environmental Horticulture, The University of Seoul, Seoul, 130-743, South Korea |
| Abstract: | Self-assembled monolayers (SAMs) of arginine (Arg) were formed on copper surface. The corrosion protection properties of the Arg SAMs were examined by electrochemical impedance spectroscopy and polarization techniques in 0.5 M HCl solution. The results show that Arg SAMs have limited protection effect. The protective efficiency increased with an increase of self-assembly time and reached maximum protection at 6 h. When iodide ion was added to the Arg-containing solution, the ability of the corrosion inhibition of the mixed SAMs improved significantly. The corrosion protection mechanism of Arg SAMs is discussed based on AM1 quantum-chemical calculations. |
| Keywords: | Copper Self-assembled monolayers Arginine Iodide ion Synergistic effect |
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