Journal
CORROSION SCIENCE
Volume 119, Issue -, Pages 68-78Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.02.021
Keywords
Corrosion inhibitor; Copper; Sulfuric acid; EIS; Quantum chemical calculation; Molecular dynamics simulation
Funding
- National Natural Science Foundation of China [21376282, 21676035]
- Sail plan of Guangdong, China [2015YT02D025]
- Material Corrosion and Protection Key Laboratory of Sichuan Province [2016CL20]
- Guizhou Provincial Department of Education Foundation [QJHKYZ2016-105]
- Fundamental Research Funds for the Central Universities [2016CDJXZ]
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In this work, four allyl imidazolium-based ionic liquids (ILs) with various length of alkyl chains were developed for the corrosion inhibition of copper in 0.5 M sulfuric acid. Electrochemical techniques, morphological characterization, theoretical caculations were combined to investigate the inhibition performance and mechanism. The results show that corrosion circumstance of copper in sulfuric aqueous solution is efficiently inhibited by these ILs. Their favorable performance is ascribed to formation of ILsadsorption films, which follow the Langmuir adsorption isotherm. Besides, the inhibition efficiencies of the investigated inhibitors increase with the augment of alkyl chain length attached to the imidazolium ring. (C) 2017 Elsevier Ltd. All rights reserved.
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