Heterogeneous corrosion of mild steel under SRB-biofilm characterised by electrochemical mapping technique

Dong, Zehua; Shi, Wei; Ruan, Hong Mei; Zhang, Guo An

doi:10.1016/j.corsci.2011.05.041

Cited by 111 publications

(45 citation statements)

References 33 publications

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“…The adverse effect of microbiological corrosion on structural metals is so great [1] and their damage to the world economy is so huge [2] that the problems of struggle against it are constantly in the field of vision of the researches [3][4][5][6][7][8][9][10][11][12][13][14][15]. Moreover, 20% of all losses from corrosion are due to microbiological impact.…”

Section: Introductionmentioning

confidence: 99%

“…In most cases, studies deal with the effects of sulfate-reducing bacteria [6,9,11,12]. However, stimulation of the corrosion of metals, particularly steel, zinc, and galvanized steel [12,13] by other microorganisms (Esteria Coli, Proteus vulgaris, Pseudomonasaeruginosa, Brucella sp, Gallionella sp, Staphylococus aureus, Staphylococus epidermidis [7,13]) is considered as well.…”

Section: Introductionmentioning

confidence: 99%

“…More frequently, the stimulating effect of bacteria cells, in particular SRB, is interpreted as the result of acceleration of the cathodic reaction because of accumulation of micro organism vital activity products, primarily hydrogen sulfide [5,16]. However, the possibility of substantial change in the nature of electrochemical reactions [9] and electron transfer in the electrode processes [11] is sufficiently broadly discussed. Serious attention is paid to studies of biofilm formation processes based on micro organism colonies and their screening influence [10] or accumulation of corrosion stimulators near a corroding surface [17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the structure of o,o´-dihydroxyazo compounds on bactericidal and inhibitory ability

2017

Int. J. Corros. Scale Inhib.

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The paper is devoted to a study of the influence of the molecule structure of a number of o,o´-dihydroxyazo (DHA) compounds on their bactericidal ability toward sulfate-reducing bacteria (SRB) in the Postgate medium at small concentrations (5-20 mg/L). DHA compounds induce a decrease in number of bacterial cells, H 2 S production by SRB, and hydrogen permeation into carbon steel in the presence of SRB. The inhibition of steel corrosion in the bacterial medium by these substances is considered as well.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of the structure of o,o´-dihydroxyazo compounds on bactericidal and inhibitory ability

2017

Int. J. Corros. Scale Inhib.

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“…Currently, researchers are investigating the formation of biofilms on the corrosion of carbon steels using various species of SRB and microbial consortia [12,13,14,15]. In these cases, artificial seawater is the main incubation medium for these bacteria [16].…”

Section: Introductionmentioning

confidence: 99%

Carbon steel corrosion induced by sulphate-reducing bacteria in artificial seawater: electrochemical and morphological characterizations

et al. 2016

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In this work, the corrosion behavior of carbon steel AISI 1020 was evaluated in artificial seawater in the presence of mixed sulfate-reducing bacteria (SRB) culture isolated from the rust of a pipeline. The corrosion evaluation was performed by electrochemical techniques (open circuit potential (E ocp ), polarization curves and electrochemical impedance spectroscopy (EIS)), while the formation of a biofilm and corrosion products were observed by scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). The presence of SRB in the medium shifted the open circuit potential to more positive values and increased the corrosion rate of the steel. Electrochemical and morphological techniques confirmed the presence of a biofilm on the steel surface. EDS spectra data showed the presence of sulfur in the corrosion products. After removing the biofilm, localized corrosion was observed on the surface, confirming that localized corrosion had occurred. The biogenic sulfide may lead to the formation of galvanic cells and contributes to cathodic depolarization.

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“…Wang et al [25,26] investigated characteristics of local electrochemistry at artificial biofilm/ stainless steel and artificial biofilm/mild steel interface with chemically added H 2 O 2 or embedded glucose oxidase in artificial biofilm, indicating that WBE method was valuable in characterizing local electrochemistry under biofilm. Dong et al [27] found that galvanic current distribution maps could indicate characteristic of localized corrosion under SRB-biofilm. Our research group also used WBE technique to study corrosion behavior of copper under SRB biofilm, and found a relationship between SRB activity and heterogeneous electrochemical corrosion of copper [28].…”

Section: Introductionmentioning

confidence: 99%

The influence of sulphate‐reducing bacteria on heterogeneous electrochemical corrosion behavior of Q235 carbon steel in seawater

Chen

Wang

Zhang

2015

Materials & Corrosion

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In this article, wire beam electrode (WBE) technique, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were used to investigate heterogeneous electrochemical corrosion behavior of Q235 carbon steel in seawater containing sulphatereducing bacteria (SRB). The presence of SRB in seawater results in the change of corrosion form of Q235 carbon steel from uniform corrosion to localized corrosion. Meanwhile, current distribution of Q235 carbon steel surface changes from homogeneity to heterogeneity in SRB medium, which is opposite to the trend in sterile medium. The localized corrosion process of Q235 carbon steel in SRB medium is indicated by increasing anodic area, and it centralizes in some local areas along with increasing of immersion time. In SRB medium, cathodic and anodic areas present different morphological characteristics. The corrosion products film on cathodic area is compact, whereas that in anodic area is loose. The corrosion products of Q235 carbon steel in SRB medium are mainly composed of FeS, FeO, and FeSO 4 and it is hard to find the difference in composition between cathodic and anodic areas.

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Heterogeneous corrosion of mild steel under SRB-biofilm characterised by electrochemical mapping technique

Cited by 111 publications

References 33 publications

Effect of the structure of o,o´-dihydroxyazo compounds on bactericidal and inhibitory ability

Effect of the structure of o,o´-dihydroxyazo compounds on bactericidal and inhibitory ability

Carbon steel corrosion induced by sulphate-reducing bacteria in artificial seawater: electrochemical and morphological characterizations

The influence of sulphate‐reducing bacteria on heterogeneous electrochemical corrosion behavior of Q235 carbon steel in seawater

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