Journal
CORROSION SCIENCE
Volume 114, Issue -, Pages 102-111Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.10.025
Keywords
Mild steel; EIS; SEM; Microbiological corrosion
Funding
- Shenzhen strategic emerging industry development special fund project [JCYJ20130401144744190]
- Innovation Foundation of Huazhong University of Science and Technology [2015TS150, 2015ZZGH010]
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In this work, the corrosion behavior and mechanism of carbon steel induced by extracellular polymeric substances (EPS) extracted from an iron-oxidizing bacterium culture were studied using surface analysis and electrochemical measurements in 3.5 wt% NaCI solutions. Results of electrochemical measurements showed that 7 day-old EPS at 240 mg L-1 inhibited the corrosion of carbon steel, especially after the EPS solution was heat treated to deactivate the enzymes in the EPS. However, 7 day-old EPS at much higher and much lower concentrations accelerated corrosion. Furthermore, 14 day-old EPS and 28 day-old EPS at 240 mg L-1 also accelerated corrosion. (C) 2016 Elsevier Ltd. All rights reserved.
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