Journal
ELECTROCHIMICA ACTA
Volume 220, Issue -, Pages 245-251Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.10.123
Keywords
Self-assembled monolayers(SAMs); Corrosion inhibition; Octadecanethiol; Benzotriazole; Synergetic effect
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Funding
- National Natural Science Foundation of China [51672075, 21271069, J1210040, 51238002]
- Science and Technology Program of Hunan Province [2015JC3049]
- Fundamental Research Funds for the Central Universities [531107040898]
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Self-assembled monolayers based on octadecanethiol (C18H37-SH) and benzotriazole (BTA) (C18H37SH&BTA SAMs) were fabricated on copper surface, showing effective corrosion protection for the substrate. The self-assembled monolayers (containing the composite SAMs and the SAMs based on single C18H37-SH or BTA) were characterized by surface enhanced Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and the results show that both C18H37-SH and BTA are successfully self-assembled on copper surface, forming compact SAMs. The anti-corrosion performance of the SAMs was studied by potentiodynamic polarization and electrochemical impedance spectroscopy. It is revealed that the anti-corrosion performance of the binary (C18H37-SH and BTA) composite SAMs is influenced by the assembling sequence. The C18H37-SH&BTA SAMs display the best anti-corrosion performance for copper with the highest charge transfer resistance of 5.0.10(5)Omega cm(2). (C) 2016 Elsevier Ltd. All rights reserved.
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