In vitro and in silico antibacterial and anti-corrosive properties of Persea americana leaves extract as an environmentally friendly corrosion inhibitor for carbon steel in a hydrochloric acid medium

The inhibitory performance of an efficient and biodegradable Persea americana leaves extract (PALE) was inspected using electrochemical methods and surface analysis techniques in 1 M HCl. Then, antibacterial activity was assessed against Staphylococcus aureus NCTC 12493, Escherichia coli ATCC 25922, and Listeria monocytogenes ATCC 19115 using a well diffusion assay. Moreover, the minimal inhibitory concentrations (MIC) and minimal bactericidal concentrations were determined. Additionally, the antibacterial activity was performed in silico. The experimental results showed that PALE has a more excellent inhibition standard for carbon steel in hydrochloric acid. Polarization investigations reported that as the concentration of PALE leaves extracts, the inhibitory power grew and reached a high value of 92%. PALE did act as a mixed-type inhibitor and preceded a Langmuir adsorption isotherm correctly. The scanning electron microscope (SEM) outcomes demonstrated that the PALE adsorption on the metallic surface significantly decreased its dissolution rate, resulting in a clean and seamless surface. Additionally, PALE was effective against bacterial strains, and molecular docking analysis revealed that apigenin and quercetin-3-glucoside might be the main compounds that inhibit bacterial proliferation.

Automated summary

The inhibitory performance of a biodegradable extract from Persea americana leaves (PALE) was studied using electrochemical methods and surface analysis techniques in hydrochloric acid solution. The extract exhibited excellent inhibition properties for carbon steel and acted as a mixed-type inhibitor. Furthermore, PALE showed effective antibacterial activity against Staphylococcus aureus, Escherichia coli, and Listeria monocytogenes, with apigenin and quercetin-3-glucoside identified as potential inhibitory compounds.