Study of role of aerobic bacteria Bacillus subtilis and Pseudomonas aeruginosa on biocorrosion behaviour of stainless steel 304 (SS304)

Study of role of aerobic bacteria Bacillus subtilis and Pseudomonas aeruginosa on biocorrosion behaviour of stainless steel 304 (SS304)

Joint Conference on GLOBAL APPLIED MICROBIOLOGY CONFERENCE & International Congress on MICROBIAL & BIOCHEMICAL RESEARCH AND TECHNOLOGIES
October 18-19, 2017 Toronto, Canada

Hafiz Zeshan Wadood, Aruliah Rajasekar, Yen-Peng Ting and Anjum Nasim Sabri

University of the Punjab, Pakistan Thiruvalluvar University, India National University of Singapore, Singapore

Posters & Accepted Abstracts : Microbiology: Current Research

Abstract:

This research work has studied the role of two bacteria namley; Bacillus subtilis strain S1X and Pseudomonas aeruginosa strain ZK in the corrosion behavior of SS304 in minimal salt medium with 1.5% NaCl as a corrosive agent. Electrochemical techniques including Tafel polarization and electrochemical impedance spectroscopy and surface analytical techniques including atomic force microscopy, scanning electron microscopy-energy dispersive spectrum analysis and Fourier transform infrared spectroscopy showed that both bacteria developed a protective layer in the form of biofilm on the surface of SS304 and thus inhibited the corroiosn of underlying surface of alloy. The decrease in pH values for bacterial inoculated systems with increasing incubation time showed the production of some acidic metabolites by bacterial isolates.