Journal
CORROSION SCIENCE
Volume 194, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109930
Keywords
Inhibitor; CO2 corrosion; Carbon steel; Adsorption; Molecular dynamics simulation; Quantum chemical calculation
Funding
- National Natural Science Foundation of China [51501160, 52171080]
- Scientific and Technological Innovation Team for the Safety of Petroleum Tubular Goods at Southwest Petroleum University [2018CXTD01]
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The two imidazoline derivatives, OI and MOI, were synthesized as highly efficient inhibitors for CO2-containing solution. The results showed that MOI had a better inhibition performance with an efficiency as high as 95.58% at 20 ppm. Theoretical calculations confirmed successful chemisorption of both inhibitors on metal surfaces, with MOI utilizing sulfhydryl as a powerful adsorption site.
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, elec-trochemical 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.
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