The Inhibition Activity of Fatty Imidazoline Acetate Derived from Waste Cooking Oil on the AISI 1018 Mild Steel Corrosion

Tsana Cholidah, Lutfiah Lila Kusumasari, Tria Febriyanti, Achmad Fadjar Maulana Firdaus, Raihana Putri Nariswari Fuadi, Kartika A. Madurani*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Imidazoline and its derivatives have been proposed as effective organic corrosion inhibitors for AISI 1018 mild steel, though challenges remain regarding their production processes and efficiency in CO2/H2S-saturated brine solutions. In this study, fatty imidazoline acetate (FIA) was synthesized from waste cooking oil and evaluated for its ability to protect AISI 1018 steel in corrosive environments. The chemical composition of the synthesized FIA was confirmed through gas chromatography-mass spectroscopy (GC–MS) and Fourier transform infrared (FTIR) spectroscopy. Corrosion inhibition performance was assessed using potentiodynamic polarization at room temperature, with the most promising results further examined via weight loss measurements and contact angle analyses. A commercial inhibitor commonly used in pipelines with CO2/H2S-saturated brine was also evaluated for comparison. Surface characterization of the steel samples, both with and without inhibitors, was conducted using scanning electron microscopy (SEM). The FIA demonstrated an inhibition efficiency (IE%) of 99.89% at a concentration of 40 mg/L, closely matching the performance of the commercial inhibitor (IE% = 99.96%). This study underscores the potential of FIA as a sustainable and effective corrosion inhibitor in CO2/H2S-saturated environments.

Original languageEnglish
Article number8
JournalJournal of Bio- and Tribo-Corrosion
Volume11
Issue number1
DOIs
Publication statusPublished - Mar 2025

Keywords

  • Corrosion protection
  • Gas-saturated brine environment
  • Imidazoline acetate
  • Material characterization
  • Waste cooking oil

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