Journal
BIOELECTROCHEMISTRY
Volume 128, Issue -, Pages 49-55Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2019.03.001
Keywords
Corrosion inhibitor; Carbon steel; Electrochemical test; Quantum chemical calculation
Funding
- Chongqing Graduate Research and Innovation Project [CXB14220]
- Student Research Training Program in Chongqing University [CQU-SRTP-2018337]
- National Natural Science Foundation of China [61271059]
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An effective and biodegradable Ficus tikoua leaves extract was studied as a corrosion inhibitor for carbon steel in hydrochloric acid. Systematic electrochemical experiments and morphological characterization were carried out to investigate the properties of the corrosion inhibitor. Meanwhile, quantum chemical calculations were performed to aid further understanding of the electrochemical mechanism. The electrochemical results reveal that the extract inhibitors act as a mixed-type with an inhibition efficiency up to 95.8% at 298 K. Moreover, this extract shows good inhibory activity at a wide range of temperatures and the corresponding results were further confirmed by morphological analysis. The chemical formulae of these major components are fully optimized in the DFT with B3LYP in the gas phase and the base set is 6-311+ +G (d, p). (C) 2019 Elsevier B.V. All rights reserved.
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