CO2 loading-dependent corrosion of carbon steel and formation of corrosion products in anoxic 30 wt.% monoethanolamine-based solutions

Liangfu Zheng, Naser S. Matin, James Landon, Gerald A. Thomas, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Corrosion of A106 carbon steel in anoxic CO2-loaded 30 wt.% monoethanolamine-based solutions (a corrosive solvent for post-combustion CO2 capture) with CO2 loadings ranging from 0.24 to 0.53 mol CO2/mol amine is investigated. The results show that corrosion and formation of a protective layer of corrosion products on the A106 surface are strongly CO2 loading-dependent. That is, initial corrosion is accelerated with increased CO2 loading. However, the formation of chukanovite and subsequently siderite, which dramatically inhibits the corrosion, was promoted with increasing CO2 loading. Chukanovite is a metastable intermediate corrosion product which transforms into siderite. Possible mechanisms are discussed.

Original languageEnglish
Pages (from-to)44-54
Number of pages11
JournalCorrosion Science
Volume102
DOIs
StatePublished - Jan 1 2016

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • A. Carbon steel
  • B. ICP-OES
  • B. SEM
  • B. Weight loss
  • B. XRD
  • C. Alkaline corrosion

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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