Journal
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume 44, Issue 7, Pages 1441-1452Publisher
SPRINGER
DOI: 10.1007/s00449-021-02524-8
Keywords
Biocorrosion; Biocorrosion inhibitor; Corrosive bacterial strains; Green inhibitor; Clove extract
Funding
- Science and Engineering Research Board (SERB), Department of Science and Technology (DST) [PDF/2017/001134]
- King Saud University, Riyadh, Saudi Arabia [RSP-2020/68]
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This study explored the biocorrosion inhibition efficiency of clove aqueous extract on carbon steel in the presence of corrosion causing bacterial strains. It was found that the addition of clove extract decreased corrosion and increased resistance, achieving an inhibition efficiency of about 87% in the mixed consortia system. The bioactive compounds in clove extract played a significant role in its antibacterial activity.
In the present investigation, biocorrosion inhibition efficiency of Syzygium aromaticum (clove) aqueous extract on carbon steel in presence of four corrosion causing bacterial strains (Bacillus subtilis, Streptomyces parvus, Pseudomonas stutzeri, and Acinetobacter baumannii) was explored. Weight loss, potentiodynamic polarization, and AC impedance studies were carried out with and without bacterial strains and clove extract. The results obtained from weight loss and AC impedance studies indicate that these corrosion causing bacterial strains accelerated the biocorrosion reaction and biofilm playing a key role in this process. However, the addition of clove extract into the corrosive medium decreased the corrosion current and increased the solution and charge transfer resistance. The significant inhibition efficiency of about 87% was archived in the mixed consortia system with clove extract. The bioactive compounds were playing an important role in the antibacterial activity of the clove extract. It was revealed that clove extract has both biocidal and corrosion inhibition properties.
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