Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5wt.% NaCl media

Qi Bao; Dun Zhang; Dandan Lv; Peng Wang

doi:10.1016/j.corsci.2012.08.044

Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5wt.% NaCl media

Qi Bao, Dun Zhang, Dandan Lv, Peng Wang

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

68 Citations (Scopus)

Abstract

The electrochemical corrosion behaviour of Q235 steels in 3.5wt.% NaCl solutions with sulphide and extracellular polymeric substances (EPS), the two main metabolites of sulphate-reducing bacteria, was separately investigated through potentiodynamic polarisation and electrochemical impedance spectroscopy. Either sulphide or EPS increased the anodic current density by nearly one order of magnitude and negatively shifted the corrosion potential. The effects of EPS at the initial stage of corrosion may be ascribed to the Fe ²⁺-complexing capability and the quickly adsorbed film. Moreover, the feeble protective effect of EPS after 16d of immersion was observed through scanning electron microscopy. © 2012.

Original language	English
Pages (from-to)	405-413
Journal	Corrosion Science
Volume	65
DOIs	https://doi.org/10.1016/j.corsci.2012.08.044
Publication status	Published - Dec 2012

Research Keywords

A. Mild steel
B. AFM
B. EIS
C. Microbiological corrosion

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title = "Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5wt.% NaCl media",

abstract = "The electrochemical corrosion behaviour of Q235 steels in 3.5wt.% NaCl solutions with sulphide and extracellular polymeric substances (EPS), the two main metabolites of sulphate-reducing bacteria, was separately investigated through potentiodynamic polarisation and electrochemical impedance spectroscopy. Either sulphide or EPS increased the anodic current density by nearly one order of magnitude and negatively shifted the corrosion potential. The effects of EPS at the initial stage of corrosion may be ascribed to the Fe 2+-complexing capability and the quickly adsorbed film. Moreover, the feeble protective effect of EPS after 16d of immersion was observed through scanning electron microscopy. {\textcopyright} 2012.",

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language = "English",

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T1 - Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5wt.% NaCl media

AU - Bao, Qi

AU - Zhang, Dun

AU - Lv, Dandan

AU - Wang, Peng

PY - 2012/12

Y1 - 2012/12

N2 - The electrochemical corrosion behaviour of Q235 steels in 3.5wt.% NaCl solutions with sulphide and extracellular polymeric substances (EPS), the two main metabolites of sulphate-reducing bacteria, was separately investigated through potentiodynamic polarisation and electrochemical impedance spectroscopy. Either sulphide or EPS increased the anodic current density by nearly one order of magnitude and negatively shifted the corrosion potential. The effects of EPS at the initial stage of corrosion may be ascribed to the Fe 2+-complexing capability and the quickly adsorbed film. Moreover, the feeble protective effect of EPS after 16d of immersion was observed through scanning electron microscopy. © 2012.

AB - The electrochemical corrosion behaviour of Q235 steels in 3.5wt.% NaCl solutions with sulphide and extracellular polymeric substances (EPS), the two main metabolites of sulphate-reducing bacteria, was separately investigated through potentiodynamic polarisation and electrochemical impedance spectroscopy. Either sulphide or EPS increased the anodic current density by nearly one order of magnitude and negatively shifted the corrosion potential. The effects of EPS at the initial stage of corrosion may be ascribed to the Fe 2+-complexing capability and the quickly adsorbed film. Moreover, the feeble protective effect of EPS after 16d of immersion was observed through scanning electron microscopy. © 2012.

KW - A. Mild steel

KW - B. AFM

KW - B. EIS

KW - C. Microbiological corrosion

UR - http://www.scopus.com/inward/record.url?scp=84867232133&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84867232133&origin=recordpage

U2 - 10.1016/j.corsci.2012.08.044

DO - 10.1016/j.corsci.2012.08.044

M3 - RGC 21 - Publication in refereed journal

SN - 0010-938X

VL - 65

SP - 405

EP - 413

JO - Corrosion Science

JF - Corrosion Science

ER -

Effects of two main metabolites of sulphate-reducing bacteria on the corrosion of Q235 steels in 3.5wt.% NaCl media

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