Evaluation of Corrosion Inhibition of Low-Carbon Steel Using Chamomile Plant Extract

Juman Naser

doi:10.31185/wjps.402

Authors

Juman Naser Department of Chemistry, College of Education for Pure Science – Ibn Al-haitham, University of Baghdad, IRAQ

DOI:

https://doi.org/10.31185/wjps.402

Keywords:

Corrosion Inhibition, Corrosion evaluation, Low Carbon Steel, Chamomile Extract

Abstract

The investigation focused on elucidating the corrosion inhibition mechanism of chamomile extract, serving as an environmentally sustainable inhibitor, across various concentrations (0.2, 0.4, 0.6, 0.8, 1.0 w/v %) applied to carbon steel immersed in a 0.6 M NaCl variations in temperature affect the solution. (303, 313, 323, 333 K). The analytical approach involved Assessment of weight reduction metrics complemented by sophisticated techniques, Scanning Electron Microscopy (SEM), Gas Chromatography-Mass Spectrometry (GC-MS), and Energy Dispersive X-ray Spectroscopy (EDS) were used to analyze the carbon steel surface with and without the extract. The principal aim was to conduct a detailed examination of the development of a layer of adsorption layer. The obtained results consistently validated a positive correlation between inhibition efficiency and extract concentration. SEM imaging visually substantiated a more extensive protective film at higher inhibitor concentrations, and EDS analysis corroborated these findings by detailing the elemental composition of the adsorbed layer. The observed reduction in inhibition efficiency with elevated temperatures suggests a thermodynamic effect, where increased temperatures diminish the adsorption of the inhibitor onto the metal surface. This comprehensive investigation establishes the potential of chamomile extract as an eco-friendly inhibitor for effectively mitigating corrosion on carbon steel in corrosive environments. The pinnacle of inhibition efficiency, reaching 96.55%, was achieved at the concentration of the inhibitor.

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