Experimental and theoretical studies of four allyl imidazolium-based ionic liquids as green inhibitors for copper corrosion in sulfuric acid

Experimental and theoretical studies of four allyl imidazolium-based ionic liquids as green inhibitors for copper corrosion in sulfuric acid

•Four allyl imidazolium-based ionic liquids are used as green inhibitors for copper corrosion in sulfuric acid.•The inhibition efficiencies of the investigated inhibitors increase with the augment of alkyl chain length attached to the imidazolium ring.•The order of inhibition ability obtained from E...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion science Vol. 119; pp. 68 - 78
Main Authors: Qiang, Yujie, Zhang, Shengtao, Guo, Lei, Zheng, Xingwen, Xiang, Bin, Chen, Shijin
Format: Journal Article
Language:English
Published: Amsterdam Elsevier Ltd 01-05-2017
Elsevier BV
Subjects:
Adsorption
Chains
Copper
Corrosion
Corrosion inhibitor
Corrosion inhibitors
Corrosion mechanisms
EIS
Electrochemical analysis
Ionic liquids
Langmuir-Blodgett films
Molecular dynamics simulation
Molecular physics
Morphology
Quantum chemical calculation
Quantum theory
Studies
Sulfuric acid
Molecular dynamics simulation
Quantum chemical calculation
Copper
Corrosion inhibitor
EIS
Sulfuric acid
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Four allyl imidazolium-based ionic liquids are used as green inhibitors for copper corrosion in sulfuric acid.•The inhibition efficiencies of the investigated inhibitors increase with the augment of alkyl chain length attached to the imidazolium ring.•The order of inhibition ability obtained from EIS is in perfect agreement with the polarization results.•Theoretical calculations provide favorable support for the experimental data. In this work, four allyl imidazolium-based ionic liquids (ILs) with various length of alkyl chains were developed for the corrosion inhibition of copper in 0.5M sulfuric acid. Electrochemical techniques, morphological characterization, theoretical caculations were combined to investigate the inhibition performance and mechanism. The results show that corrosion circumstance of copper in sulfuric aqueous solution is efficiently inhibited by these ILs. Their favorable performance is ascribed to formation of ILs-adsorption films, which follow the Langmuir adsorption isotherm. Besides, the inhibition efficiencies of the investigated inhibitors increase with the augment of alkyl chain length attached to the imidazolium ring.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2017.02.021