Suitability and stability of 2-mercaptobenzimidazole as a corrosion inhibitor in a post-combustion CO2 capture system

Liangfu Zheng; James Landon; Neal C. Koebcke; Payal Chandan; Kunlei Liu

doi:10.5006/1524

Suitability and stability of 2-mercaptobenzimidazole as a corrosion inhibitor in a post-combustion CO₂ capture system

Liangfu Zheng, James Landon, Neal C. Koebcke, Payal Chandan, Kunlei Liu

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The corrosion inhibition of 2-mercaptobenzimidazole on A106 carbon steel and its stability in a post-combustion CO₂ capture system with application of 5 M monoethanolamine aqueous solutions has been evaluated by linear polarization resistance, electrochemical impedance spectroscopy, immersion corrosion testing, scanning electron microscopy/energy dispersive spectroscopy, x-ray diffraction, and liquid chromatography-mass spectroscopy. Although no notable layer of protective corrosion product was found on the A106 surface at 80°C and atmospheric pressure for >180 h, corrosion was inhibited, and its polarization resistance increased nearly an order of magnitude when 2-mercaptobenzimidazole was added. However, degradation of 2-mercaptobenzimidazole, associated with the formation of an FeS layer with cracks, occurred at 108°C and 4.13×10⁵ Pa.

Original language	English
Pages (from-to)	692-702
Number of pages	11
Journal	Corrosion
Volume	71
Issue number	6
DOIs	https://doi.org/10.5006/1524
State	Published - Jun 1 2015

Bibliographical note

Publisher Copyright:
© 2015, NACE International.

Keywords

Aqueous environments
Autoclave testing
Carbon dioxide
Carbon steel
Galvanic corrosion
Organic inhibitor
Sulfide stress cracking

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Materials Science

Access to Document

10.5006/1524

Cite this

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title = "Suitability and stability of 2-mercaptobenzimidazole as a corrosion inhibitor in a post-combustion CO2 capture system",

abstract = "The corrosion inhibition of 2-mercaptobenzimidazole on A106 carbon steel and its stability in a post-combustion CO2 capture system with application of 5 M monoethanolamine aqueous solutions has been evaluated by linear polarization resistance, electrochemical impedance spectroscopy, immersion corrosion testing, scanning electron microscopy/energy dispersive spectroscopy, x-ray diffraction, and liquid chromatography-mass spectroscopy. Although no notable layer of protective corrosion product was found on the A106 surface at 80°C and atmospheric pressure for >180 h, corrosion was inhibited, and its polarization resistance increased nearly an order of magnitude when 2-mercaptobenzimidazole was added. However, degradation of 2-mercaptobenzimidazole, associated with the formation of an FeS layer with cracks, occurred at 108°C and 4.13×105 Pa.",

keywords = "Aqueous environments, Autoclave testing, Carbon dioxide, Carbon steel, Galvanic corrosion, Organic inhibitor, Sulfide stress cracking",

author = "Liangfu Zheng and James Landon and Koebcke, {Neal C.} and Payal Chandan and Kunlei Liu",

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AU - Landon, James

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AU - Chandan, Payal

AU - Liu, Kunlei

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