Role of Thiosulfate in the Corrosion of Steels: A Review

Choudhary, Lokesh; Macdonald, Digby D.; Alfantazi, Akram

doi:10.5006/1709

Cited by 90 publications

(91 citation statements)

References 103 publications

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“…Instead, previous studies have consistently identified fermentative Halanaerobium taxa as dominant colonizing microorganisms across different wells and shale plays (3, 5, 9, 10). In some instances, Halanaerobium strains may account for up to 99% of the relative abundance of the microbial community and are almost always detected as persisting key members in produced fluids (3, 4, 8–12).…”

Section: Introductionmentioning

confidence: 91%

Sulfide Generation by Dominant Halanaerobium Microorganisms in Hydraulically Fractured Shales

Booker

Borton

Daly

et al. 2017

mSphere

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Although thousands of wells in deep shale formations across the United States have been hydraulically fractured for oil and gas recovery, the impact of microbial metabolism within these environments is poorly understood. Our research demonstrates that dominant microbial populations in these subsurface ecosystems contain the conserved capacity for the reduction of thiosulfate to sulfide and that this process is likely occurring in the environment. Sulfide generation (also known as “souring”) is considered deleterious in the oil and gas industry because of both toxicity issues and impacts on corrosion of the subsurface infrastructure. Critically, the capacity for sulfide generation via reduction of sulfate was not detected in our data sets. Given that current industry wellhead tests for sulfidogenesis target canonical sulfate-reducing microorganisms, these data suggest that new approaches to the detection of sulfide-producing microorganisms may be necessary.

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Section: Introductionmentioning

confidence: 91%

Sulfide Generation by Dominant Halanaerobium Microorganisms in Hydraulically Fractured Shales

Booker

Borton

Daly

et al. 2017

mSphere

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“…Cr 3+ peaks are observed at 577.6 and 576.1 eV (Fig. 7c), which refer to Cr(OH) 3 and Cr 2 S 3 respectively. Fig.…”

Section: CLmentioning

confidence: 99%

“…Therefore, in thiosulfate-only solution, the increased current may attributed to thiosulfate species to oxidize to tetrathionates or other high oxidation state sulfur species. In addition, the E-pH diagram of S-H 2 O system shows that thiosulfate species may oxidize to HSO 3 − at high potential. Fig.…”

Section: Concentration Of Chloride Concentration Of Thiosulfatementioning

confidence: 99%

“…[1][2][3][4] SGs, which is used in pressurized water reactor (PWR) between the primary and secondary loops, are heat exchangers used to convert secondary-loop water into steam. 5 UNS N08800 is one of the most frequently used SG tubing materials, which has shown excellent performance in CANDU (CANada Deuterium Uranium) system without serious problems during long term service for almost 30 years.…”

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confidence: 99%

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Factors Influencing Passivity Breakdown on UNS N08800 in Neutral Chloride and Thiosulfate Solutions

Wang

Shi

et al. 2017

J. Electrochem. Soc.

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In this work, the passivity degradation of UNS N08800 in solutions containing Cl − and S 2 O 3 2− is studied by using polarization curve, electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). Experimental results reveal that the passivity breakdown heavily depends on anodic potentials, concentration ratios of Cl − to S 2 O 3 2− , and the composition of materials. A combined effect between Cl − and S 2 O 3 2− on pitting corrosion is observed at high anodic potentials at which the passive film is broken down; in this situation, S 2 O 3 2− ions can enter into the pits by electromigration, and they are reduced to S ads and S 2− , stabilizing the metastable pits and accelerate the pit growth rate. However, there is no such combined effect at low anodic potentials when the passive film is intact, on the contrary, S 2 O 3 2− is beneficial to passivity in chloride solutions. At low anodic potentials, the interaction of S 2 O 3 2− with an intact passive layer is weak, and the adsorption of S 2 O 3 2− would mitigate the detrimental effect of Cl − ions.

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“…The dissolution of carbon steel in contact with wet ammonium chloride (NH 4 Cl) is reported to be very aggressive at higher concentrations, nearly approaching to corrosion via hydrochloric acid . However, in synergy with sulfur species such as hydrogen sulfide, thiosulfate, polysulfides, etc., corrosion is found to be even more rapid and stringent …”

Section: Introductionmentioning

confidence: 99%

Kinetics of carbon steel dissolution in ammonium chloride solution containing sodium thiosulfate

Baranwal

Rajaraman

2019

Int J of Chemical Kinetics

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The dissolution behavior of carbon steel in ammonium chloride (NH4Cl) solution containing sodium thiosulfate (Na2S2O3) of various concentrations (0.01 and 0.1 M) was investigated using electrochemical impedance spectroscopy (EIS) and other nonelectrochemical techniques. The weight loss and polarization measurements indicate a significant increase in the NH4Cl corrosion rate of carbon steel on addition of Na2S2O3. The EIS measurements exhibited two capacitive loops at multiple direct current (dc) potentials for both the concentrations. Electrical equivalent circuit (EEC) and reaction mechanism analysis (RMA) were employed to analyze the impedance data. A four‐step mechanism with two intermediate adsorbate species of same charge was proposed to explain the dissolution behavior of carbon steel in the given system. The surface coverage values enumerated that the surface was entirely covered with adsorbed species unlike in the pure NH4Cl system. Charge transfer resistance and polarization resistance values estimated from RMA parameters indicate the increase in a dissolution rate with dc potential. The surface morphology was inspected via field emission scanning electron microscopy, and the corrosion products including surface state of carbon steel electrode were analyzed using energy dispersive X‐ray spectroscopy and X‐ray photoelectron spectroscopy.

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Role of Thiosulfate in the Corrosion of Steels: A Review

Cited by 90 publications

References 103 publications

Sulfide Generation by Dominant Halanaerobium Microorganisms in Hydraulically Fractured Shales

Sulfide Generation by Dominant Halanaerobium Microorganisms in Hydraulically Fractured Shales

Factors Influencing Passivity Breakdown on UNS N08800 in Neutral Chloride and Thiosulfate Solutions

Kinetics of carbon steel dissolution in ammonium chloride solution containing sodium thiosulfate

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