Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution
The corrosion inhibition performance of an imidazolium-based ionic liquid (IL), 1-butyl-3-methylimidazolium thiocyanate (BMIm), was studied on AA 6061 alloy in 1 M HCl solution at 303 K, 333 K, and 363 K by gravimetric tests, potentiodynamic polarization, and electrochemical impedance spectroscopy (...
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doaj-389d7236d38e4d23b0dd2e592d361e6c2020-11-25T03:57:44ZengMDPI AGMaterials1996-19442020-10-01134672467210.3390/ma13204672Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl SolutionXiaohong Wang0Ailing Huang1Dongquan Lin2Mohd Talha3Hao Liu4Yuanhua Lin5School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaSchool of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, ChinaThe corrosion inhibition performance of an imidazolium-based ionic liquid (IL), 1-butyl-3-methylimidazolium thiocyanate (BMIm), was studied on AA 6061 alloy in 1 M HCl solution at 303 K, 333 K, and 363 K by gravimetric tests, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) analysis. Scanning electron microscopy with energy dispersive X-ray (SEM-EDX) and X-ray photoelectron spectroscopy (XPS) were used to detect the surface morphologies and chemical composition of the surface films. The results indicate that this IL inhibits AA 6061 corrosion in acid with maximum inhibition efficiencies of 98.2%, 86.6%, and 41.2% obtained at 303 K, 333 K, and 363 K respectively. Inhibition efficiency generally decreased with increasing immersion time; the major exception was at 303 K, whereby the inhibition efficiency was detected to increase with immersion time from 30 to 90 min and then decrease slightly beyond 90 min. The results indicate that BMIm is a mixed-type inhibitor with a predominant effect on cathodic reactions. Surface morphology analyses by SEM revealed less surface damage in the presence of the inhibitor. XPS analysis established the development of a protective film on the AA 6061 surface which was hydrophobic in nature.https://www.mdpi.com/1996-1944/13/20/4672corrosion inhibitionionic liquidAA 6061XPS |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xiaohong Wang Ailing Huang Dongquan Lin Mohd Talha Hao Liu Yuanhua Lin |
spellingShingle |
Xiaohong Wang Ailing Huang Dongquan Lin Mohd Talha Hao Liu Yuanhua Lin Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution Materials corrosion inhibition ionic liquid AA 6061 XPS |
author_facet |
Xiaohong Wang Ailing Huang Dongquan Lin Mohd Talha Hao Liu Yuanhua Lin |
author_sort |
Xiaohong Wang |
title |
Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution |
title_short |
Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution |
title_full |
Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution |
title_fullStr |
Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution |
title_full_unstemmed |
Imidazolium-based Ionic Liquid as Efficient Corrosion Inhibitor for AA 6061 Alloy in HCl Solution |
title_sort |
imidazolium-based ionic liquid as efficient corrosion inhibitor for aa 6061 alloy in hcl solution |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-10-01 |
description |
The corrosion inhibition performance of an imidazolium-based ionic liquid (IL), 1-butyl-3-methylimidazolium thiocyanate (BMIm), was studied on AA 6061 alloy in 1 M HCl solution at 303 K, 333 K, and 363 K by gravimetric tests, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) analysis. Scanning electron microscopy with energy dispersive X-ray (SEM-EDX) and X-ray photoelectron spectroscopy (XPS) were used to detect the surface morphologies and chemical composition of the surface films. The results indicate that this IL inhibits AA 6061 corrosion in acid with maximum inhibition efficiencies of 98.2%, 86.6%, and 41.2% obtained at 303 K, 333 K, and 363 K respectively. Inhibition efficiency generally decreased with increasing immersion time; the major exception was at 303 K, whereby the inhibition efficiency was detected to increase with immersion time from 30 to 90 min and then decrease slightly beyond 90 min. The results indicate that BMIm is a mixed-type inhibitor with a predominant effect on cathodic reactions. Surface morphology analyses by SEM revealed less surface damage in the presence of the inhibitor. XPS analysis established the development of a protective film on the AA 6061 surface which was hydrophobic in nature. |
topic |
corrosion inhibition ionic liquid AA 6061 XPS |
url |
https://www.mdpi.com/1996-1944/13/20/4672 |
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