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Inhibition performances of graphene oxide/silver nanostructure for the microbial corrosion: molecular dynamic simulation study

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Abstract

Steel is one of the mainly used materials in the oil and gas industry. However, it is susceptible to the marine corrosion, which 20% of the total marine corrosion is caused by microbiologically influenced corrosion (MIC). The economic and environmental impacts of corrosion are significant, and it is crucial to fight against corrosion in a proper sustainability context and environmental-friendly methods. In this study, the graphene oxide/silver nanostructure (GO-Ag) inhibitory effect on the corrosion of steel in the presence of sulfate reducing bacteria (SRB) was investigated, via weight loss (WL) and Tafel polarization measurements. Moreover, molecular dynamic (MD) simulations were performed to obtain a deep understanding of the corrosion inhibition effect of GO-Ag. GO-Ag showed a significant antibacterial effect at 80 ppm. Moreover, WL and Tafel polarization measurements illustrated a great inhibition efficiency, which reached up to 84% reduction of WL and 98% reduction of corrosion current density (Icorr) after 7 days of incubation with GO-Ag. Based on MD simulations, bonding energy reached to the larger value in the presence of GO-Ag, which indicated the ability of graphene oxide nanosheets to be adsorbed on the steel surface and prevent the access of corrosive agents to the steel surface. The radial distribution function (RDF) results implied distance between corrosive agent (water and SRB) and steel surface (Fe atoms), which indicated protection of the steel surface due to the effective adsorption of GO nanosheets through the active sites of the steel surface. The mean square displacement (MSD) result showed smaller displacement of the corrosive particles on the surface of steel, resulting that the GO-Ag molecules bonded with Fe molecules on the surface of steel.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

The Iran National Science Foundation (INSF) under Grant 97007558 had a partial financial support to publish this article.

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Correspondence to Fatemeh Yazdian.

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Kalajahi, S.T., Mofradnia, S.R., Yazdian, F. et al. Inhibition performances of graphene oxide/silver nanostructure for the microbial corrosion: molecular dynamic simulation study. Environ Sci Pollut Res 29, 49884–49897 (2022). https://doi.org/10.1007/s11356-022-19247-2

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  • DOI: https://doi.org/10.1007/s11356-022-19247-2

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