Pit initiation mechanism of modified martensitic 13Cr stainless steel exposed to CO2 saturated acidic environments at elevated temperatures induced by Ti(C,N) inclusions

Martinez, Alan; Narayanan, Deeparekha; Case, Raymundo; Castaneda, Homero; Radwan, Ahmed Bahgat; Bhadra, Jolly; Al-Qahtani, Noora H.; Abdullah, Aboubakr M.; Al-Thani, Noora; El-Haddad, Muhsen A.M.

doi:10.1016/j.electacta.2023.143655

Cited by 3 publications

(3 citation statements)

References 71 publications

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“…In the Fe 2p spectrum, two typical Fe2p1/2 and Fe 2p3/2 peaks are observed at binding energies of 725.0 eV and 709.3 eV, respectively. According to previous studies referenced in the literature [ 40 , 45 , 46 ], the peak located at 709.3 eV of Fe 2p3/2 is assigned to FeCO 3 . Additionally, satellite features associated with iron are present at binding energies of 719.1 eV and 733.2 eV.…”

Section: Resultsmentioning

confidence: 96%

Inhibition Effect of Triphenylmethane Dyes for the Corrosion of Carbon Steel in CO2-Saturated NaCl Corrosion Medium

Peng,

Wen,

Yan

et al. 2024

Materials

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Carbon dioxide corrosion presents a significant challenge in the oil and gas field. This study simulates the corrosive environment characteristics of oil and gas fields to investigate the corrosion inhibition properties of three triphenylmethane dyes. The inhibitive performance and mechanisms of these dyes were analyzed through weight loss and electrochemical testing, revealing that crystal violet (CV) exhibited a superior inhibition effectiveness over malachite green (MG) and Fuchsine basic (FB). At a concentration of 150 ppm in a CO2-saturated 5% NaCl solution at 25 °C, CV achieved an impressive maximum inhibition efficiency of 94.89%. With the increase in temperature, the corrosion rate slightly decreased, and the corrosion rate was 92.94% at 60 °C. The investigated CV acted as a mixed-type corrosion inhibitor and its protection obeyed the Langmuir adsorption isotherm. The corrosion morphology was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and confocal laser scanning microscopy (CLMS). Quantum chemical calculations and molecular dynamics simulations were employed to validate the corrosion inhibition mechanisms, providing guidance for the further application of these dyes in corrosion control.

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Section: Resultsmentioning

confidence: 96%

Inhibition Effect of Triphenylmethane Dyes for the Corrosion of Carbon Steel in CO2-Saturated NaCl Corrosion Medium

Peng,

Wen,

Yan

et al. 2024

Materials

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“… 54 , 55 claimed a reduction in Cr 2 O 3 is apparent, along with an increase in Cr(OH) 3 . The presence of Cr(OH) 3 has been reported to increase defect concentration in the passive film that contributes to higher corrosion kinetics 56 . However, in CO 2 and H 2 S containing environments, ref.…”

Section: Resultsmentioning

confidence: 99%

“…Mott–Schottky was performed from −1 V to the positive direction using a 40 mV step size and applying an excitation signal of 10 mV and frequency of 1000 Hz. The step size was selected to ensure limited variation in defect densities throughout the duration of the test 56 . Once the experiment concluded, the autoclave was cooled down to 25 °C and the system was depressurized and H 2 S was neutralized using the scrubber.…”

Section: Methodsmentioning

confidence: 99%

Localized corrosion in selective laser melted SS316L in CO2 and H2S brines at elevated temperatures

Narayanan,

Martinez,

Martin

et al. 2024

npj Mater Degrad

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In this work, the passivation and localized corrosion of selective laser melted (SLM) stainless steel 316 L when exposed to high pressures of CO2 with the presence of H2S and Cl− at 25 °C and 125 °C were studied. Depletion of Cr/Mo was observed at the cell interiors and melt-pool boundaries (MPBs) compared to the cell boundaries. Volta potential differences obtained from scanning Kelvin probe force microscopy (SKPFM) showed that the MPBs were 8–20 mV lower than the matrix, while the cell interiors were 20–50 mV lower than the cell boundaries. Electrochemical impedance spectroscopy (EIS) and Mott–Schottky tests indicated a more defective passive film at 125 °C, and X-ray photoelectron spectroscopy (XPS) confirmed the formation of a less protective film with an increased S/O ratio at 125 °C than 25 °C. Initiation of localized corrosion was observed at the MPBs and pits formed after a week of immersion were wider by an order of magnitude at 125 °C than 25 °C, with evidence of cell-interior dissolution. While passivity was observed even at elevated temperatures, local chemical heterogeneities compromised the stability of the film and contributed to localized corrosion in SLM SS316L.

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Thermal fatigue performance enhancement of new high-Cr martensitic die steels based on overall microstructure manipulation by trace TiC–TiB2 nanoparticles

Li,

Zou

et al. 2024

Materials Science and Engineering: A

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Pit initiation mechanism of modified martensitic 13Cr stainless steel exposed to CO2 saturated acidic environments at elevated temperatures induced by Ti(C,N) inclusions

Cited by 3 publications

References 71 publications

Inhibition Effect of Triphenylmethane Dyes for the Corrosion of Carbon Steel in CO2-Saturated NaCl Corrosion Medium

Inhibition Effect of Triphenylmethane Dyes for the Corrosion of Carbon Steel in CO2-Saturated NaCl Corrosion Medium

Localized corrosion in selective laser melted SS316L in CO2 and H2S brines at elevated temperatures

Thermal fatigue performance enhancement of new high-Cr martensitic die steels based on overall microstructure manipulation by trace TiC–TiB2 nanoparticles

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