Mercaptopropionic acid-modified oleic imidazoline as a highly efficient corrosion inhibitor for carbon steel in CO2-saturated formation water

Ziqi Zheng, Junying Hu, Noam Eliaz, Li Zhou, Xi Yuan, Xiankang Zhong

Research output: Contribution to journalArticlepeer-review

Abstract

Two imidazoline derivatives (OI and MOI) were synthesized as highly efficient inhibitors, and their inhibition performances and mechanisms in CO2-containing solution were studied using weight loss measurements, electrochemical tests, surface analysis and theoretical calculations. The results indicate that OI and MOI show excellent inhibition efficiency. Especially for MOI, its inhibition efficiency is as high as 95.58% at 20 ppm. Theoretical calculations confirm that both inhibitors successfully adsorb on metal surface via chemisorption. MOI shows a better inhibition performance than OI, because the sulfhydryl in MOI can be used as a powerful adsorption site, effectively improving the adsorption ability of MOI.

Original languageEnglish
Article number109930
JournalCorrosion Science
Volume194
DOIs
StatePublished - Jan 2022

Keywords

  • Adsorption
  • CO corrosion
  • Carbon steel
  • Inhibitor
  • Molecular dynamics simulation
  • Quantum chemical calculation

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