Sulfate-reducing bacteria-assisted cracking

Wu, Tangqing; Sun, Cheng; Mao, Yan; Xu, Jin; Yin, Fucheng

doi:10.1515/corrrev-2018-0041

Cited by 12 publications

(4 citation statements)

References 94 publications

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“…Furthermore, Sun et al 23 observed that iron-oxidizing bacteria (IOB) were involved in the synthesis of α-FeOOH, while iron-reducing bacteria (IRB) and anaerobic environments contributed to the formation of Fe 3 O 4 . In addition, microorganisms can also induce severe localized corrosion, which leads to dangerous perforation of steel sheet piles 24 .…”

Section: Introductionmentioning

confidence: 99%

Steel rust layers immersed in the South China Sea with a highly corrosive Desulfovibrio strain

et al. 2022

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Although it is well known that microbes play a significant role in marine corrosion, few studies have systematically studied the relationship between microorganisms and corrosion products under long-term immersion. In this study, the corrosion characteristics of the rust layer formed on carbon steel immersed in the South China Sea for 5.5 years were investigated using various surface analysis and microbial community analysis techniques. Magnetite (Fe3O4), iron sulfide, and green rust were identified in the inner rust layer. The middle rust layer was composed of maghemite (γ-Fe2O3), and some Fe3O4 and mackinamite were also detected. The outer rust layer contained several Fe(III)-oxyhydroxides, and it had a large number of fouling organisms attached to it. In all of the rust layers, anaerobic sulfate-reducing bacteria (SRB) were the dominant bacteria, and they may have played a key role in the formation of the corrosion products. One SRB strain (Desulfovibrio bizertensis SY-1) with a highly corrosivity (13.561 mg/cm2) was isolated from these rust layers, and its physiological and metabolic characteristics were studied. These results expand the membership of corrosive SRB and establish a better understanding of marine microbiologically influenced corrosion (MIC).

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Section: Introductionmentioning

confidence: 99%

Steel rust layers immersed in the South China Sea with a highly corrosive Desulfovibrio strain

et al. 2022

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“…Furthermore, Sun et al 23 observed that ironoxidizing bacteria (IOB) were involved in the synthesis of α-FeOOH, while iron-reducing bacteria (IRB) and anaerobic environments contributed to the formation of Fe 3 O 4 . Meanwhile, microorganisms would also induce severe localized corrosion, which lead to dangerous perforation of steel sheet piles 24 .…”

Section: Introductionmentioning

confidence: 99%

Chemical and microbial composition of long-time steel rust layers in the South China Sea with a novel highly corrosive Desulfovibrio strain isolated from it

Zhai

Dong

Zhang

et al. 2022

Preprint

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Although it is well acknowledged that microbes played a significant role in the marine corrosion, few studies have systematically studied on the relationship between microorganisms and corrosion products under long-term immersion. In this work, the corrosion characteristics of the rust layer formed on carbon steel immersed in the South China sea after 5.5 years were investigated by various surface analysis and microbial community techniques. Magnetite (Fe3O4), iron sulfide and green rust were identified in the inner rust layer. The middle rust layer was dominated by maghemite (γ-Fe2O3), while some Fe3O4 and mackinamite were also detected. The outer rust layer contained several Fe(Ⅲ)-oxyhydroxides, along with a large number of fouling organisms attached. In all rust layers, anaerobic SRB was the dominant bacteria, and might play a key role during the formation of corrosion products. One SRB strain (Desulfovibrio bizertensis SY-1) with highly corrosivity (13.561 mg/cm2) was isolated from these rust layers, and the physiological and metabolic characteristics were also studied. These results helped expand the membership of corrosive SRB and establish better understanding of marine MIC.

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“…Field and laboratory studies have verified that sulfate-reducing bacteria can assist in cracking and embrittlement of pipe steels [10]. In a paper [11], a mini-review was done giving the available information on SRB-assisted cracking of pipe steels in the presence of hydrogen. The effect of hydrogen on the SRB life, as well as the combined effect of hydrogenation and biocorrosion on the strength and ductility of steels, was studied in [12].…”

Section: Introductionmentioning

confidence: 99%

Microdefects of Biocorroded Pipe Steel Surfaces and Safety Assessment of Localized Stress Concentrators

Maruschak

Dzyura

Prentkovskis

et al. 2020

Metals

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The effect of sulfate-reducing bacteria (SRB) on the corrosion of steel 20 was investigated. Results demonstrated that the chemical composition of corrosion products, the corrosion rate, and corrosion type were altered due to the adherence of SRB and the subsequent formation of biofilm on the steel 20 surface. The micromechanisms of biocorrosion damage of specimens from pipe steel 20 were quantified on the basis of the microgeometry of the degraded surface and the localization parameters of corrosive stress microconcentrators. Stress concentrators in the vicinity of the micro-cuts, which are the depths of the profilograms, make it possible to evaluate safe (allowable) microcorrosion damage. The proposed approach complements the well-known methods for monitoring biodeterioration of pipe steels. With its help, it was found that a decrease in the corrosion rate of specimens with the addition of an inhibitor does not always clearly indicate its effectiveness. The case where the introduction of an inhibitor led to the destruction of the SRB biofilm on the surface of specimens from steel 20, but caused the activation of local corrosion processes and the formation of a more developed microrelief, is considered. The hollows of such microrelief are potential places of origin of defects, which require additional control.

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Sulfate-reducing bacteria-assisted cracking

Cited by 12 publications

References 94 publications

Steel rust layers immersed in the South China Sea with a highly corrosive Desulfovibrio strain

Steel rust layers immersed in the South China Sea with a highly corrosive Desulfovibrio strain

Chemical and microbial composition of long-time steel rust layers in the South China Sea with a novel highly corrosive Desulfovibrio strain isolated from it

Microdefects of Biocorroded Pipe Steel Surfaces and Safety Assessment of Localized Stress Concentrators

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