Microbiologically influenced corrosion of C1018 carbon steel by nitrate reducing Pseudomonas aeruginosa biofilm under organic carbon starvation

• DOI: 10.1016/j.corsci.2017.08.007
• Publication Date: 2017-08-12T13:32:26Z
• Authors: Ru Jia; Dongqing Yang; Jin Xu; Dake Xu; Tingyue Gu
• Keywords: Carbon fibers; Carbon steel; Pitting Corrosion

Abstract This work showed that a wild-type Pseudomonas aeruginosa (PAO1) grown as a nitrate reducing bacterium biofilm on C1018 carbon steel was more corrosive under organic carbon source starvation. P. aeruginosa biofilms were pre-grown for 2 days to achieve maturity before the culture media were changed to fresh culture media with 100% (as in the standard medium), 10%, and 0% organic carbons for subsequent 7-day incubation. Biofilms with 100%, 10%, and 0% organic carbons caused maximum pit depths of 5.4 μm, 10.6 μm, and 17.0 μm, respectively. Weight loss, linear polarization resistance and electrochemical impedance spectroscopy data corroborated the pitting data.