Microbiologically-Influenced Corrosion of 1020 Carbon Steel in Artificial Seawater Using Garlic Oil as Natural Biocide

Abstract

This work aims evaluate the use of biocides in the microbiologically-influenced corrosion (MIC) of AISI 1020 carbon steel by sulfate-reducing bacteria (SRB) in artificial seawater. A natural biocide (garlic oil) and a commercial biocide (glutaraldehyde) were used to control the corrosion caused by these bacteria in artificial seawater. Microbial growth on the steel surface was evaluated by quantifying the sessile SRB using the most probable number (MPN) method. The action of biocides in the biocorrosion process was studied by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The biofilm formation and the corrosion products on the steel surface were observed by scanning electron microscopy (SEM). The results showed that, although it was not able to inhibit the growth of sessile SRB completely, garlic oil showed a greater reduction in the corrosion process when compared to glutaraldehyde, indicating its possible application as a natural biocide under these conditions.

Comprehensive Review on the Use of Biocides in Microbiologically Influenced Corrosion

“…They can destroy the cell membrane of SRP, cause cell death, and destroy the formation of biofilm [ 126 ]. Silva et al [ 127 ] compared the performance of garlic oil and glutaraldehyde as biocides to prevent MIC. The results showed that both garlic oil and glutaraldehyde can reduce the corrosion of steel and prevent the formation of biofilm.…”

Biocides and techniques for their encapsulation: a review

“…Cinnamaldehyde immobilized onto MSNPs proved to be the most effective antimicrobial from the tested EOs, with the potential to be used to treat and prevent bacterial infections in crops and to enable more controlled and effective exploitation of volatile compounds as antimicrobials. 17 In addition, EOs can have many applications as food preservatives, [18][19][20] corrosion inhibitors, 21 preservation of cultural heritage, 22 etc. Different materials have been used to encapsulate EOs, including polymeric particles, liposomes, and solid lipid NPs, and a detailed review of EO encapsulation can be found in the literature.…”

Analysis of the Antibacterial Activity and the Total Phenolic and Flavonoid Contents of the Moringa oleifera Leaf Extract as an Antimicrobial Agent against Pseudomonas aeruginosa

“…The limit for chemical biocides is that they are toxic and ecologically unfriendly [ 18 ]. Recently, researchers have developed an ecofriendly biocide to address this issue [ 19 – 21 ].…”