期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 310, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2020.113239
关键词
Q235 steel; Locust Bean Gum; Corrosion inhibitor; EIS; Langmuir adsorption
资金
- National Natural Science Foundation of China [21706195]
- Student's Platform for Innovation and Entrepreneurship Training Program [20195200501]
- Guizhou Provincial Department of Education Foundation [QJHKYZ2015-390]
Locust Bean Gum(LBG) was studied as a novel and eco-friendly corrosion inhibitor using experimental and theoretical calculation methods. These research methods include open-circuit potential (OCP), potentiodynamic polarization curves (PDP), electrochemical impedance spectroscopy (EIS), surface morphology analysis (AFM and SEM), quantum chemical calculations (QCC), and molecular dynamics simulations (MDS). Potentiodynamic polarization test data shows that when the concentration of LBG is 5 mM at 298 K, the corrosion inhibition efficiency of LBG is 89.8% for Q235 steel in 0.5 M H2SO4 solution. AFM and SEM morphology maps convincingly confirm the data of electrochemical tests. The adsorption of LBG on Q235 steel/solution interface was consistent with Langmuir single-layer model. In addition, theoretical calculations show that LBG can show excellent corrosion inhibition performance. (C) 2020 Elsevier B.V. All rights reserved.
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