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Arginine self-assembled monolayers against copper corrosion and synergistic effect of iodide ion

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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.

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Acknowledgements

This work was supported by the National Science Foundation of China (20776083) and Program for New Century Excellent Talents in University. The authors express their appreciation to the Key laboratory of Shanghai Colleges and Universities for Electric Power Corrosion Control and Applied Electrochemistry.

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Correspondence to Da-Quan Zhang.

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Zhang, DQ., He, XM., Cai, QR. et al. Arginine self-assembled monolayers against copper corrosion and synergistic effect of iodide ion. J Appl Electrochem 39, 1193–1198 (2009). https://doi.org/10.1007/s10800-009-9784-7

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  • DOI: https://doi.org/10.1007/s10800-009-9784-7

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