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| INHIBITION OF MIXED SELF-ASSEMBLED FILMS OF PHENYLALANINE AND TRYPTOPHAN FOR COPPER CORROSION |
| LIU Peihui, GAO Lixin, ZHANG Daquan |
| School of Energy and Environment Engineering, Shanghai University of Electronic Power, Shanghai 200090 |
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Abstract The mixed self-assembled films of phenylalanine (Phe) and tryptophan (Trp) were prepared on the copper surface. Their inhibition effect for copper corrosion in 3% NaCl solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. Interaction between phenylalanine and tryptophan was studied using fluorescence analysis.The results showed both Phe-SAMs and Trp-SAMs have protection effect for copper. They rendered the corrosion potential to a positive shift. There was an antagonism between phenylalanine and tryptophan in the mixed SAMs. Photoinduced electron transfer in the mixed SAMs was verified by fluorescence emission.
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Received: 06 January 2011
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Corresponding Authors:
ZHANG Daquan
E-mail: zhangdaquan@shiep.edu.cn
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