학술논문
Biocorrosion inhibition of Cu70:Ni30 by Bacillus subtilis strain S1X and Pseudomonas aeruginosa strain ZK biofilms.
Document Type
Academic Journal
Author
Wadood HZ; Department of Biology, Lahore Garrison University, Lahore, Pakistan.; Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.; Rajasekar A; Department of Biotechnology, Thiruvalluvar University, Vellore, India.; Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore.; Farooq A; Department of Metallurgy and Materials Engineering, Corrosion Control Research Cell, University of the Punjab, Lahore, Pakistan.; Ting YP; Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore.; Sabri AN; Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.
Source
Publisher: Wiley-VCH Verlag Country of Publication: Germany NLM ID: 8503885 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1521-4028 (Electronic) Linking ISSN: 0233111X NLM ISO Abbreviation: J Basic Microbiol Subsets: MEDLINE
Subject
Language
English
Abstract
Microbiologically influenced corrosion (MIC) or biocrorrosion is a cause of huge economic set back for industries around the globe. The present work deals with the study of corrosion of copper alloy (Cu-Ni 70:30) in the presence of bacterial biofilms produced by Bacillus subtilis strain S1X and Pseudomonas aeruginosa strain ZK. MIC was investigated using electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy, and through analytical techniques such as scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and atomic force microscopy (AFM). The Cu-Ni coupons were exposed to bacteria in minimal salt medium supplemented with NaCl for a period of 15 days. AFM and FTIR analysis revealed formation of a thick biofilm on the surface of the Cu alloy in bacterial inoculated systems. The electrochemical results demonstrated a decreased current density and corrosion rate for the systems with bacterial biofilms. These findings were supported by the results of SEM and weight loss studies. The results showed the inhibition of corrosion for Cu-Ni in biotic conditions (with biofilms) as compared with abiotic conditions (without biofilms).
(© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
(© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)