A Laboratory Corrosion Inhibition Study of Carbon Steel Using 2-Mercaptobenzothiazole (MBT) Under Post-Combustion CO2 Capture Conditions

Wei Li, James Landon, Dali Qian, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Corrosion mitigation is an important aspect of amine-based post-combustion CO2 capture operations due to the desire to use less expensive but corrosion-vulnerable materials, e.g., low carbon steels in the construction of a capture system. The corrosion behavior of A106 (grade B) carbon steel with an in-house proprietary amine-based solvent was investigated in a laboratory environment at 80°C using an organic corrosion inhibitor, 2-mercaptobenzothiazole (MBT). The corrosion inhibition mechanism was interpreted by electrochemical methods and surface analyses. The results revealed that the corrosion rates of carbon steel were significantly retarded using MBT. Adsorbed MBT on steel surface blocks surface sites for cathodic corrosion reactants to reach the steel surface. The critical inhibitor concentration was determined to lie between 10 ppm and 50 ppm under the tested conditions.

Original languageEnglish
Pages (from-to)646-654
Number of pages9
JournalCorrosion
Volume77
Issue number6
DOIs
StatePublished - Jun 2021

Bibliographical note

Funding Information:
The authors would like to acknowledge the Department of Energy National Energy Technology Laboratory (NETL) for financial support of this project (DE-FE0007395). Additional financial support was provided by Louisville Gas & Electric (LG&E) and Kentucky Utilities (KU), Duke Energy, Electric Power Research Institute (EPRI), Kentucky Power, and the Kentucky Department of Energy Development and Independence (KY-DEDI).

Keywords

  • carbon steel
  • CO2 capture
  • corrosion
  • mass loss
  • scanning electron microscopy/energy-dispersive x-ray spectroscopy
  • x-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Materials Science (all)

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