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Inhibiting Effect of Ionic Liquids on the Corrosion of Mild Steel in H 2 S and HCl Solution
Author(s) -
Cui Fusheng,
Ni Yuqing,
Jiang Juncheng,
Ni Lei,
Wang Zhirong
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201900320
Subject(s) - corrosion , adsorption , ionic liquid , langmuir adsorption model , alkyl , electrochemistry , metal , chemistry , inorganic chemistry , materials science , organic chemistry , catalysis , electrode
Abstract Four imidazolium‐based ionic liquids (ILs) were selected to investigate the inhibiting effect of ILs with various alkyl chain lengths on the corrosion of mild steel in H 2 S and HCl solution using electrochemical experiments, weight loss and surface analyses, and quantum chemical study. The results demonstrated that these ILs acted as mixed‐type inhibitors and efficiently inhibited the corrosion of mild steel in H 2 S and HCl solution. Their excellent corrosion inhibition ability was due to their adsorption process on the metal surface, which followed the Langmuir adsorption isotherm. Furthermore, extending the alkyl chain length in the ILs could improve their inhibition performance.