Determination of biocorrosion of low alloy steel by sulfate‐reducing <i>Desulfotomaculum</i> sp. isolated from crude oil field

Çetin, Demet; Bilgiç, S.; Dönmez, Sedat; Dönmez, Gönül

doi:10.1002/maco.200704069

Cited by 18 publications

(7 citation statements)

References 34 publications

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“…Similar results were reported by Mollica and Trevis [30], and they also believe that biofilm formed during the period of the freely corroding potential shifted toward positive. The biofilm, containing high active thermophile SRB, the metabolite such as extracellular polymer substances (EPS) and the corrosion products of iron sulfides (FeS x ) were thin and half-baked before the stationary phase [31]. Moreover, the biofilm could probably participate in the cathode process and changed according to the bacterial activity, corresponding to the anode process smoothing with the growth of bacteria before the dead phase.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Growth characteristics of thermophile sulfate‐reducing bacteria and its effect on carbon steel

Liu

et al. 2009

Materials & Corrosion

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Sulfate-reducing bacteria (SRB) have been identified as the main corrosive microorganisms causing unpredictable failure of materials. In this present work, a strain of thermophile SRB isolated from Bohai oilfield of China has been characterized and preliminarily identified. Furthermore, its effects on carbon steel at 60 8C in SRB culture media were studied by electrochemical methods such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), and weight loss measurements. The results show that the bacteria belong to Desulfotomaculum. The optimum growth temperature and pH of the bacteria were 60 8C and 7.0, respectively. Weight loss measurements suggested that the corrosion rate of carbon steel in the culture media inoculated with thermophile SRB at 60 8C was 2.2 times less than that at 37 8C. At 60 8C, SRB shifted the freely corroding potential of carbon steel toward a more positive value in the first 10 days, which later change to a negative value. Results obtained from potentiodynamic polarization and EIS were in good agreement. The changes in biofilm structure with increase in bacteria supply offers some kind of protection to the base material in the early culture days at 60 8C. Subsequently, it accelerated corrosion. Energy dispersive spectrometry (EDS) and X-ray diffraction (XRD) methods indicate that corrosion products such as iron sulfides (FeS x ) in biofilm play an important role in the biocorrosion process.

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Section: Electrochemical Measurementsmentioning

confidence: 99%

Growth characteristics of thermophile sulfate‐reducing bacteria and its effect on carbon steel

Liu

et al. 2009

Materials & Corrosion

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“…The microbial activity was observed to influence the overall corrosion process, whereas, pitting and localized attack was found [14]. Effect of iron concentration on corrosion behavior was studied by Çetin et al [15] on low alloy steel in the presence of Desulfotomaculum isolated from an oil production well. Çetin and Donmez [16], studied corrosion behavior of low alloy steel, in the presence of anaerobic sulfate-reducing Desulfotomaculum sp.…”

Section: Introductionmentioning

confidence: 99%

Microbial influenced corrosion by thermophilic bacteria

2011

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The present study was undertaken to investigate microbial influenced corrosion (MIC) on stainless steels due to thermophilic bacteria Desulfotomaculum nigrificans. The objective of the study was to measure the extent of corrosion and correlate it with the growth of the biofilm by monitoring the composition of its extracellular polymeric substances (EPS). The toxic effect of heavy metals on MIC was also observed. For this purpose, stainless steels 304L, 316L and 2205 were subjected to electrochemical polarization and immersion tests in the modified Baar's media, control and inoculated, in anaerobic conditions at room temperature. Scanning electron microscopy (SEM)/ energy dispersive spectroscopy (EDS) were used to identify the chemicals present in/outside the pit. The results show maximum corrosive conditions when bacterial activity is highest, which in turn minimizes the amount of carbohydrate and protein along with the increase in the fraction of uronic acid in carbohydrate in EPS of the biofilm. However, although bacterial activity and corrosion rate decreases, the amount of biofilm components continue to increase. It is also observed that the toxicity of metals ions affect the bacterial activity and EPS production. It was observed that Desulfotomaculum sp. has the ability to biodegrade its own EPS.

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“…Within bacteria, sulfate‐reducing bacteria (SRB), have the largest impact on corrosion due to widespread distribution of sulfate in anoxic environments . SRBs have been implicated in the corrosion of cast iron and steel, ferritic, and other highly alloyed stainless steels, copper nickel and high nickel molybdenum alloys, and so forth …”

Section: Introductionmentioning

confidence: 99%

Electrochemical and theoretical assessment of the effect of two biocides on the corrosion of petroleum steel in sulfur‐polluted Black Sea water

Hasanzade

Bilgiç

Gece

et al. 2019

Materials & Corrosion

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Although the inhibitory effects of different biocides continue to gain everincreasing importance, the corrosion inhibition of petroleum steel in the Black Sea water by such compounds remains largely uncharacterized. Thus, to study the effect of sulfate-reducing bacteria, corrosion parameters in oxygen-free medium contaminated with sulfur have been determined. The variation of corrosion rates with the addition of two biocides, glutaraldehyde (GA) and ammonium chloride (AC), has been determined by using Tafel extrapolation and linear polarization methods in sulfur-polluted seawater, both with and without biocides. Overall, this experimental work, also corroborated by theoretical data, reveals that some concentrations of GA and AC act as effective biocides in sulfur-polluted medium. K E Y W O R D S ammonium chloride, biocide, DFT, glutaraldehyde, petroleum steel, SRB

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Determination of biocorrosion of low alloy steel by sulfate‐reducing Desulfotomaculum sp. isolated from crude oil field

Cited by 18 publications

References 34 publications

Growth characteristics of thermophile sulfate‐reducing bacteria and its effect on carbon steel

Growth characteristics of thermophile sulfate‐reducing bacteria and its effect on carbon steel

Microbial influenced corrosion by thermophilic bacteria

Electrochemical and theoretical assessment of the effect of two biocides on the corrosion of petroleum steel in sulfur‐polluted Black Sea water

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