4.6 Article

Inhibition Mechanism of Some Vinylalkylimidazolium-Based Polymeric Ionic Liquids against Acid Corrosion of API 5L X60 Steel: Electrochemical and Surface Studies

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ACS OMEGA
卷 7, 期 42, 页码 37807-37824

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AMER CHEMICAL SOC
DOI: 10.1021/acsomega.2c04787

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  1. CONACYT
  2. BUAP-FIQ
  3. VIEP

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The corrosion inhibition mechanism of API 5L X60 steel exposed to 1.0 M H2SO4 was evaluated using three vinylalkylimidazolium poly(ionic liquids) (PILs), which showed promising surface protection by surface adsorption and charge transfer processes.
A corrosion inhibition mechanism of API 5L X60 steel exposed to 1.0 M H2SO4 was proposed from the evaluation of three vinylalkylimidazolium poly(ionic liquids) (PILs), employing electrochemical and surface analysis techniques. The synthesized PILs were classified as mixed-type inhibitors whose surface adsorption was promoted mainly by bromide and imidazolate ions, which along with vinylimidazolium cations exerted a resistive effect driven by a charge transfer process by means of a protective PIL film with maximal efficiency of 85% at 175 ppm; the steel surface displayed less surface damage due to the formation of metal-PIL complex compounds.

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