Synergistic Effect of Carbamide and Sulfate Reducing Bacteria on Corrosion Behavior of Carbon Steel in Soil

Li, Ximing; Sun, Cheng

doi:10.1155/2018/7491501

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…The weight loss of the Q235 steel in the SY-1 medium after 15 days of exposure was 13.561 ± 2.89 mg/cm 2 , and its corrosion rate was four times that in the sterile cultured medium. Based on the other SRB corrosion data 63,[69][70][71][72] , the carbon steel coupons in the SY-1 strain medium experienced a larger corrosion weight loss than those due to the other SRB, and the corrosion rate of the SY-1 strain was more than one third higher than that of the more corrosive D. desulfuricans.…”

Section: Corrosion Rate Tests On D Bizertensis Sy-1mentioning

confidence: 98%

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: Corrosion Rate Tests On D Bizertensis Sy-1mentioning

confidence: 98%

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

et al. 2022

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“…Microbiologically influenced corrosion (MIC) refers to microbial life activities that directly or indirectly promote the metal destruction caused by the corrosion process [1][2][3][4][5]. They can be found in various fields such as soil, machinery, oil fields and seawater.…”

Section: Introductionmentioning

confidence: 99%

Study on corrosion behavior of X80 steel under stripping coating by sulfate reducing bacteria

2021

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Background At present, microorganism has been considered as important factors that threaten to buried pipelines with disbonded coatings. Aiming at the problem of unknown corrosion mechanism of sulfate-reducing bacteria (SRB), a series of studies have been carried out in this paper. Spectrophotometer and fluorescent labeling technology are used to study the growth and attachment of SRB in the simulated soil solution. The corrosion behavior of X80 pipeline steel with or without SRB was researched by electrochemical methods such as open circuit potential, dynamic potential polarization curve, and electrochemical impedance spectroscopy. The microscopic morphology of the corrosion products on the surface was observed with a scanning electron microscope (SEM), and the element content of the corrosion products on the surface of the sample after corrosion was observed using X-ray energy spectrum (EDS) analysis. Results The results showed that the growth and reproduction of SRB caused the pH of the soil simulated solution to increase, which may promote the corrosion of X80 steel. In addition, the cathode reaction of X80 steel in a sterile environment is the reduction of H+, and the main corrosion product is iron oxide. When the soil simulation solution contains SRB, the cathodic reaction is controlled by both H+ reduction and sulfide depolarization reactions, and FeS appears in the corrosion products. Conclusion Although the life cycle of SRB is only about 14 days, the corrosion of X80 steel is greatly promoted by SRB, and even causes corrosion perforation, which will bring huge economic losses and serious safety hazards.

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“…Microbiologically influenced corrosion (MIC) refers to microbial life activities that directly or indirectly promote the metal destruction caused by the corrosion process [1][2][3][4][5] . It is found in equipment in various fields such as soil, machinery, oil fields and seawater.…”

mentioning

confidence: 99%

Study on Corrosion Behavior of X80 Steel under Stripping Coating by Sulfate Reducing Bacteria

Cui

Qin

Gao

2020

Preprint

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Background: At present, microorganism has been considered as important factors that threaten to buried pipelines with disbonded coatings. Aiming at the problem of unknown corrosion mechanism of sulfate-reducing bacteria (SRB), a series of studies have been carried out in this paper. Spectrophotometer and fluorescent labeling technology are used to study the growth and attachment of SRB in the simulated soil solution. The electrochemical behavior of X80 pipeline steel with or without SRB was researched by electrochemical methods such as open circuit potential, dynamic potential polarization curve, and electrochemical impedance spectroscopy. The microscopic morphology of the corrosion products on the surface of the sample was observed with a scanning electron microscope (SEM), and the element content of the corrosion products on the surface of the sample after corrosion was observed using X-ray energy spectrum (EDS) analysis. Results: The results showed that the growth and reproduction of SRB caused the pH of the soil simulated solution to increase, which promoted the corrosion of X80 steel. In addition, the cathode reaction of X80 steel in a sterile environment is the reduction of H+, and the main corrosion product is Fe oxides. When the soil simulation solution contains SRB, the cathodic reaction is controlled by both H+ reduction and sulfide depolarization reactions, and FeS appears in the corrosion products. Conclusion: Although the life cycle of SRB is only about 14 days, the corrosion of X80 steel is greatly promoted by SRB, and even causes corrosion perforation, which will bring huge economic losses and serious safety hazards.

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Synergistic Effect of Carbamide and Sulfate Reducing Bacteria on Corrosion Behavior of Carbon Steel in Soil

Cited by 9 publications

References 27 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

Study on corrosion behavior of X80 steel under stripping coating by sulfate reducing bacteria

Study on Corrosion Behavior of X80 Steel under Stripping Coating by Sulfate Reducing Bacteria

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