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Updated: Dec 16, 2025

Determining the Chemical Composition of Corrosion Inhibitor/Metal Interfaces with XPS: Minimizing Post Immersion Oxidation
Published on: March 15, 2017
Towards understanding corrosion inhibition of sulfonate/carboxylate functionalized ionic liquids: An experimental and
Shuyun Cao1, Dan Liu2, Hui Ding3
1State Key Laboratory of Separation Membranes and Membrane Processes & School of Textile Science and Engineering, Tiangong University, Tianjin 300387, PR China; Tianjin Key Laboratory of Green Chemical Technology and Process Engineering, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, PR China.
Abstract:
The inhibition performance of ionic liquids, abbreviated as [(CH2)COOHMIm][HSO4], [(CH2)2COOHMIm][HSO4], and [(CH2)3SO3HMIm][HSO4] was investigated for carbon steel in 0.5 M HCl solution. Results indicated that these ionic liquids could act as effective inhibitors by adsorption onto the steel surface, and the inhibition efficiency increases with cation alkyl chain length and concentration up to a limit. The inhibition efficiency of a sulfonate-type ionic liquid with a longer alkyl chain is higher than those of the carboxylate-type ionic liquids. Besides, the order of inhibition efficiency was verified by both computational calculation and electrochemical experimental observations.
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