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.
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1 June 2015
Research Article|
January 22 2015
Suitability and Stability of 2-Mercaptobenzimidazole as a Corrosion Inhibitor in a Post-Combustion CO2 Capture System Available to Purchase
Kunlei Liu
‡ Corresponding author. E-mail: [email protected].
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‡ Corresponding author. E-mail: [email protected].
* Center for Applied Energy Research, University of Kentucky, 2540 Research Park Drive, Lexington, KY 40511-8410.
Received:
October 18 2014
Revision Received:
January 22 2015
Accepted:
January 22 2015
Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2015 NACE International
2015
CORROSION (2015) 71 (6): 692–702.
Article history
Received:
October 18 2014
Revision Received:
January 22 2015
Accepted:
January 22 2015
Citation
Liangfu Zheng, James Landon, Neal C. Koebcke, Payal Chandan, Kunlei Liu; Suitability and Stability of 2-Mercaptobenzimidazole as a Corrosion Inhibitor in a Post-Combustion CO2 Capture System. CORROSION 1 June 2015; 71 (6): 692–702. https://doi.org/10.5006/1524
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