Physicochemical Properties, Antibacterial Activity, And Corrosion Inhibition Of Clove (Syzygium Aromaticum L.) Essential Oil

Abstract

This study investigated the properties of Syzygium aromaticum essential oil, including its physical and chemical properties, antibacterial activity, and corrosion inhibition effect on mild steel X70 in 1M hydrochloric acid. Weight loss method was used to study the corrosion inhibitory effect. Two extraction methods were used to compare their effects on the quality of essential oil: hydrodistillation and continuous extraction using a Soxhlet apparatus. The study found that the extraction yields for hydrodistillation and continuous extraction were 11.25% and 25.11%, respectively. Organoleptic characteristics (color, odor, and aspect), and some physicochemical properties of the extracted essential oil such as refractive index, acid index, ester index, and saponification value are given in this work. The study of antibacterial activity using the diffusion method shows that the clove essential oil has significant antibacterial activities against the bacterial strains tested. Moreover, the treatment with clove essential oil at a concentration of 1 g/l, and 2 hours of immersion time, prevented the corrosion of steel with an inhibition efficiency of 99.33% for the oil obtained by hydrodistillation and 99.5% for the oil obtained by continuous extraction using a solvent.