The inhibition performance of morpholinium derivatives on corrosion behavior of carbon steel in the acidized formation water: Theoretical, experimental and biocidal evaluations

The aim of the present study is to synthesis and explore the inhibition influences of three morpholinium cationic surfactants (coded: MCS-10, MCS-12, and MCS-14) on the carbon steel corrosion in petroleum wells formation water containing 3 M HCl solution at different temperatures. The chemical structures of the synthesized compounds were confirmed by FTIR, (HNMR)-H-1 analysis. The surface properties of the surfactants were investigated via the surface tension measurements. Inhibition efficiencies obtained from weight loss were in good agreement and they were up to 92.2, 92.8, and 93.1% for MCS-10, MCS-12, and MCS-14, respectively. The effect of temperature on the corrosion behavior of mild steel was studied in the range of 298-343 K. Villamil adsorption isotherm was found to be the more fitted model for the adsorption process description. Also, the biocidal activity for the synthesized morpholinium surfactants was studied. The parameters of DFT and molecular dynamic simulation were found adequately correlated with the obtained experimental results. Surface morphology study through scanning electron microscope (SEM) analysis showed a significant improvement on the surface morphology of the steel plate in the presence of MCS-14 in the corrosive solution. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study aimed to synthesize and explore the inhibitory effects of three morpholinium cationic surfactants on carbon steel corrosion in petroleum wells formation water containing 3 M HCl solution at different temperatures. The synthesized compounds were characterized by FTIR and HNMR analysis, with inhibition efficiencies reaching up to 93.1%. Temperature effects on corrosion behavior were studied and the Villamil adsorption isotherm was found to be the most suitable model. Additionally, the biocidal activity and surface morphology improvements of the surfactants were investigated, showing promising results in corrosion inhibition.