Sulfate‐reducing bacteria‐assisted hydrogen‐induced stress cracking of 2205 duplex stainless steels

Łabanowski, Jerzy; Rzychoń, T.; Simka, Wojciech; Michalska, Joanna

doi:10.1002/maco.201910802

Cited by 5 publications

(2 citation statements)

References 36 publications

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“…These studies largely focused on the corrosion behaviors of carbon steel in sulfate‐reducing bacteria (SRB)‐containing suspension. [ 10,11 ] Sun et al [ 12 ] pointed out that the corrosion rate of Q235 with SRB was higher than that without SRB. They found that the cathodic current density of steel immersed in the soil with SRB was larger than that without SRB.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviors of carbon steel induced by life activities of Phaeodactylum tricornutum in a marine environment

Zhang

Hua

et al. 2020

Materials & Corrosion

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Microbiologically influenced corrosion induced by bacteria has been studied for many years. Corrosion is known to be sensitive to the presence of microalgae, such as Phaeodactylum tricornutum. However, the life activity of P. tricornutum that influences the general and localized corrosion of carbon steel is not fully understood. The current study uses a combination of immersion tests and electrochemical experiments with a detailed surface characterization to reveal the naturally formed corrosion products with/without the presence of P. tricornutum. The results show that samples suffer from pitting corrosion and the averaged pit depths are approximately 15 μm under a light–dark cycle condition or a 24‐h constant light condition. Meanwhile, the corrosion products are mainly comprised of γ‐FeOOH and Fe3O4 in a constant light condition. However, γ‐FeOOH, Fe3O4, and FeCO3 are found in a light–dark cycle. This study proposes the fundamental mechanisms of the effect of P. tricornutum life activities on the corrosion performance of Q235 carbon steel, to fulfill the knowledge gaps of the presence of microalgae inducing the general and pitting corrosion of carbon steel.

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Section: Introductionmentioning

confidence: 99%

Corrosion behaviors of carbon steel induced by life activities of Phaeodactylum tricornutum in a marine environment

Zhang

Hua

et al. 2020

Materials & Corrosion

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“…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]. The exhaustion of steel ductility and embrittlement of its structure makes it especially relevant to study the influence of the microrelief shape on the stress concentration in local microregions of the surface.…”

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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Heat-Affected Zone Characterization of X2CrNiN22-2 Lean Duplex Stainless Steel by Metallographic and Electrochemical Techniques

Varbai

2023

J. of Materi Eng and Perform

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This research aimed to investigate the heat-affected zone of lean duplex stainless steel grade X2CrNiN22-2. Different heat-affected zone microstructures and grain morphologies were developed by Gleeble simulations. The governing microstructures were evaluated by metallographic techniques and electrochemical corrosion measurements. It was found that the 1200-800 °C cooling time significantly affects the microstructure, austenite content, and corrosion properties. The average austenite content in the case of 1 s cooling time is 30.7 ± 1%, which increased with the longer cooling times up to 38.6 ± 0.9%. The rapid cooling times resulted in a more ferritic microstructure, which promoted nitride precipitation in the ferrite grains. The nitride precipitations acted as nucleation sites for pitting initiation in 3.5 wt.% NaCl solution. The lowest pitting potential was measured in the case of the most rapidly cooled sample: 573 ± 31 mV, while the balanced, annealed microstructure had much better pitting corrosion resistance, showing a pitting potential of 1308 ± 62 mV vs. the Ag/AgCl (KCl sat.) reference electrode. The results of this research can be used in designing welding parameters for the welding of the X2CrNiN22-2 lean duplex stainless steel. Graphical Abstract

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Sulfate‐reducing bacteria‐assisted hydrogen‐induced stress cracking of 2205 duplex stainless steels

Cited by 5 publications

References 36 publications

Corrosion behaviors of carbon steel induced by life activities of Phaeodactylum tricornutum in a marine environment

Corrosion behaviors of carbon steel induced by life activities of Phaeodactylum tricornutum in a marine environment

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

Heat-Affected Zone Characterization of X2CrNiN22-2 Lean Duplex Stainless Steel by Metallographic and Electrochemical Techniques

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