Passivation of X65 (UNS K03014) carbon steel in NaHCO 3 solution in a CO 2 environment

Xu, Lining; Hui, Xidong; Shang, Weijing; Wang, Bei; Zhu, Jiying

doi:10.1016/j.corsci.2016.04.012

Cited by 21 publications

(9 citation statements)

References 26 publications

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“…Square specimens in 0.5 mol/L NaHCO 3 solution were previously demonstrated to be passive; in high temperature and high pressure CO 2 environments, their potential would increase after immersion for a long period . This result is consistent with that of the present study on thin wire specimens.…”

Section: Discussionsupporting

confidence: 92%

“…Finally, these reactions cause the formation of a FeCO 3 film. In the previous work on the same system, we reported that this film is composed of FeCO 3 by using XRD. In the present study, the film on the thin wire specimens was inferred to be FeCO 3 through EDS analysis (Table ).…”

Section: Discussionmentioning

confidence: 85%

“…NaHCO 3 concentration and temperature had a substantial influence on the film deposited. In our previous work, the current density of square specimens immersed in high NaHCO 3 concentration solution was lower than that of square specimens immersed in low NaHCO 3 concentration solution for the same period, which demonstrated that concentration had a large effect on the film deposition, which then affected the specimen's passivation. Thin wire specimens are useful to conduct multiple sets of experiments because of the small size of their working interface.…”

Section: Discussionmentioning

confidence: 85%

“…This result is consistent with that of the present study on thin wire specimens. The current density of specimens immersed for 7 days was previously reported to be lower than that of specimens immersed in 0.5 mol/L NaHCO 3 solution for 6 h; therefore, film deposition affects the specimen's passivation. NaHCO 3 concentration and temperature had a substantial influence on the film deposited.…”

Section: Discussionmentioning

confidence: 91%

“…Sherar et al suggested that Fe(OH) 2 and FeCO 3 are oxidized or electrooxidized to form Fe 2 O 3 , Fe 3 O 4 , and other Fe 3+ when the test steel is polarized using specific ranges of passivation potential. In a previous study, we reported that X65 steel can be passivated in 0.5 mol/L NaHCO 3 solution in a high temperature and high pressure CO 2 environment; a compact FeCO 3 film forms after immersion and the substrate is favorably protected.…”

Section: Introductionmentioning

confidence: 97%

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Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Shang

et al. 2017

Materials & Corrosion

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The passivation of X65 steel in NaHCO3 solution saturated with CO2 was investigated using electrochemical and immersion tests as well as surface morphology and composition analysis. The tests were conducted using thin wire specimens at atmospheric pressure in NaHCO3 solution with different concentrations and at different temperatures. The electrochemical properties of thin wire specimens and square specimens were compared. Thin wire specimens were immersed for a long period, during which the open circuit potential (OCP) was recorded. Anodic polarization was performed after the OCP was sufficiently high and stable. Electrochemical tests revealed that the electrochemical properties of the thin wire specimens were consistent with those of the square specimens. A sudden increase in the OCP of approximately 700 mV occurred after the specimens were immersed for a long period in the tested concentration and temperature. The time at which the OCP increase occurred decreased when the NaHCO3 concentration or temperature were increased. After the OCP became stable, anodic polarization revealed favorable self‐passivation. Immersion tests on X65 steel demonstrated that the OCP increase may have been due to the filling of pores between FeCO3 grains. Small tetrahedron grains formed in the pores of large hexahedral grains to lower the porosity of the film, thus making the film more compact. Consequently, the OCP increased and anodic polarization presented self‐passivation.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Shang

et al. 2017

Materials & Corrosion

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Corrosion behavior of carbon steel in chloride and bicarbonate ion‐enriched and CO₂‐saturated solutions

Zhang

Hou

et al. 2020

Materials & Corrosion

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This article addresses the knowledge gap in the area of the synergistic effect between Cl− and normalH normalC normalO 3 − by comprehensively evaluating the corrosion behavior of AISI 1020 carbon steel exposed to the CO2‐saturated solutions containing Cl− and/or normalH normalC normalO 3 − over the time period of 6–72 hrs at 60°C. The results show a synergistic mechanism between Cl− and normalH normalC normalO 3 − in the pitting corrosion of carbon steel. normalH normalC normalO 3 − accelerates the localized precipitation of FeCO3 crystals by means of increasing pH and adsorption, which is a prerequisite for pitting initiation. Cl− contributes to the catalytic dissolution of the Fe matrix along with film breakdown via the local accumulation of oxygen vacancies, and the pitting corrosion of carbon steel is, thus, further exacerbated.

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Effect of SO42− in aerobic/anaerobic environment and its interaction with HCO3− on corrosion behavior of carbon steel

Gao,

Wang,

Han

2024

J Mater Sci

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Passivation of X65 (UNS K03014) carbon steel in NaHCO 3 solution in a CO 2 environment

Cited by 21 publications

References 26 publications

Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Corrosion behavior of carbon steel in chloride and bicarbonate ion‐enriched and CO₂‐saturated solutions

Effect of SO42− in aerobic/anaerobic environment and its interaction with HCO3− on corrosion behavior of carbon steel

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Passivation of X65 (UNS K03014) carbon steel in NaHCO 3 solution in a CO 2 environment

Cited by 21 publications

References 26 publications

Passivation of X65 steel in NaHCO3 solution saturated with CO2 using thin wire specimens

Passivation of X65 steel in NaHCO3 solution saturated with CO2 using thin wire specimens

Corrosion behavior of carbon steel in chloride and bicarbonate ion‐enriched and CO2‐saturated solutions

Effect of SO42− in aerobic/anaerobic environment and its interaction with HCO3− on corrosion behavior of carbon steel

Contact Info

Product

Resources

About

Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Passivation of X65 steel in NaHCO₃ solution saturated with CO₂ using thin wire specimens

Corrosion behavior of carbon steel in chloride and bicarbonate ion‐enriched and CO₂‐saturated solutions