Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 526, Issue -, Pages 268-280Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.04.092
Keywords
Copper; Corrosion inhibitor; Polarization; Theoretical calculation; Acid inhibition
Categories
Funding
- National Natural Science Foundation of China [21676035, 21706195]
- Sail plan of Guangdong, China [2015YT02D025]
- Graduate Research and Innovation Foundation of Chongqing, China [CYB17022]
- Science and Technology Program of Guizhou Province [QKHJC2016-1149]
- Guizhou Provincial Department of Education Foundation [QJHKYZ2016-105]
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Diallyl disulfide (DAD), propyl disulfide (PPD) and dibenzyl disulfide (DBD) flavouring agents as copper corrosion inhibitors in 0.5 mol/L H2SO4 solution were evaluated with multitudinous experiments including electrochemical techniques, morphological characterization measurements, FTIR spectra and theoretical calculations. The electrochemical results indicate that PPD and DBD show mixed-type inhibitors and DAD belongs to cathodic-type inhibitor, and the corrosion inhibition capacity follow order: PPD > DBD > DAD. The adsorption of these compounds on the surface of copper conforms to the Langmuir adsorption isotherm model. Furthermore, theoretical calculations were applied to deeply understand the inhibition mechanism of three disulfide-based compounds. (C) 2018 Elsevier Inc. All rights reserved.
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