Biogenic corrosion inhibitor on mild steel protection in concentrated HCl medium.

ABSTRACT: Turbinaria ornata (TO) extract was tested as green corrosion inhibitor on mild steel (MS) coupons in conc. HCl medium with an efficiency of 100% at 25?g?l-1 during 5?min exposure. Antibacterial efficacy performed against 16?S rDNA identified marine biofilming bacteria (MBB) and human pathogenic bacteria (HPB). Maximum inhibition growth was 16?mm on MBB observed in Bacillus megaterium (MBF14 - AB894827) and 20?mm on HPB in Escherichia coli (B5 - NCIM 2931). Similarly, minimum of 10?mm on MBB witnessed in Pseudomonas sp., (MBF9 - AB894829). Toxicity studies proved 50.0% LC50 at 500??g?ml-1 in 24?hrs, whereas Balanus amphitrite resulted in 100% mortality within 12?hrs. Results including weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy, FT-IR and GC-MS confirm 10-Octadecaonic acid as a major corrosion inhibitor from T. ornata and is discovered as a novel antifoulant. Anticorrosion formulation will become available soon.

SUBMITTER: Krishnan M 

PROVIDER: S-EPMC5805700 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature