Influence of elemental sulfur on the corrosion mechanism of X80 steel in supercritical CO2-saturated aqueous phase environment

Gong, Qingjun; Xiang, Yanhong; Zhang, Jianquan; Wang, Rongteng; Qin, Dahui

doi:10.1016/j.supflu.2021.105320

Cited by 20 publications

(6 citation statements)

References 45 publications

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“…The adsorption energy refers to the energy released by adsorbate after being adsorbed stably on the surface. The calculation formula of adsorption energy is [ 36,45 ]

E_{ad} = E_{{CO}_{3}^{2 -} / surface} - E_{surface} - E_{{CO}_{3}^{2 -}}

…”

Section: Resultsmentioning

confidence: 99%

“…The CO 2 corrosion resistance of the coating was studied by autoclave experiment under high temperature and the pressure of CO 2 up to 3 MPa. [ 45 ] To further analyze the mechanism of CO 2 corrosion resistance of the coating, a series of models were established between the surfaces and corrosion particle (

{CO}_{3}^{2 -}

). Adsorption energy and density of states (DOS) function were calculated to compare the corrosion resistance of different surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment

et al. 2021

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A novel superhydrophobic nickel‐reduced graphene oxide (sNi‐rGO) coating is fabricated successfully on an N80 steel substrate using a simple electrodeposition method combined with a directly elevated current approach. The results show that the water contact angle (WCA) of the coating is 162.87° when the concentration of graphene oxide (GO) is 0.6 g L−1. The autoclave experiments indicate that the coatings still maintain superhydrophobic and corrosion resistance under high‐temperature and high‐pressure CO2 condition. The density functional theory calculations are employed to investigate the adsorption models of carbonate (CO32−) on the surfaces of iron (Fe), nickel (Ni), and rGO to further verify the CO2 corrosion resistance mechanism of the sNi‐rGO coating.

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“…The adsorption energy refers to the energy released by adsorbate after being adsorbed stably on the surface. The calculation formula of adsorption energy is [ 36,45 ]

E_{ad} = E_{{CO}_{3}^{2 -} / surface} - E_{surface} - E_{{CO}_{3}^{2 -}}

…”

Section: Resultsmentioning

confidence: 99%

{CO}_{3}^{2 -}

). Adsorption energy and density of states (DOS) function were calculated to compare the corrosion resistance of different surfaces.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment

et al. 2021

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“…The oxide film formed is mainly TiO 2 . In the environment where titanium alloy is in service, H 2 S will undergo an ionization reaction to ionize HS − , S 2− and H + , and the specific ionization process is as follows [47]:…”

Section: Corrosion Mechanismmentioning

confidence: 99%

First-Principles Study on the Adsorption Characteristics of Corrosive Species on Passive Film TiO2 in a NaCl Solution Containing H2S and CO2

Dong

Zhang

Zhu

et al. 2022

Metals

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The adsorption characteristics of corrosive anions (Cl−, HS−, S2−, HCO3− and CO32−) on TiO2 of TC4 titanium alloy in a NaCl solution containing H2S and CO2 were studied by density functional theory (DFT). The stable adsorption configuration of each corrosive species on the TiO2 (110) surface was obtained by geometric optimization, and the electronic structure and interface binding energy were calculated and analyzed. The results showed that the optimal adsorption positions of Cl−, HS−, S2−, HCO3−and CO32− on TiO2 (110) were all bridge positions. There was a strong charge interaction between the negatively charged Cl, S and O atoms in Cl−, HS−, S2−, HCO3− and CO32− and the positively charged Ti atoms of TiO2. The interface bonding was mainly caused by charge movement from around Ti atoms to around Cl, O, S atoms. The energy levels were mainly caused by the electron orbital hybridization of Cl-3p5, S-3p4, O-2p4 and Ti-3d2. All adsorption configurations were chemical adsorption. The order of influence of the five ions on the stability of TiO2 was S2− > CO32− > Cl− > HS− > HCO3−. Finally, a novel corrosion mechanism was proposed to illustrate the dynamic evolution processes of pits.

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“…Representative 3D images are shown in Figure 9. To comprehend the severity of the localized corrosion, a pitting factor was proposed to characterize the severity of pitting corrosion [15]:…”

Section: Surface and Component Characterizationmentioning

confidence: 99%

“…Zagal et al [14] suggested that acid formation caused by sulfur hydrolysis was the main factor controlling corrosion in the presence of S8. Gong et al [15] argued that with an increase in immersion time, the uniform corrosion rate in the absence of S8 increased slightly, whereas the corrosion rate in the presence of S8 decreased with an increase in immersion time in a supercritical carbon-dioxide-saturated aqueous environment. Zhang et al [16] studied the galvanic effect between the covered electrode and the bare electrode of mixed sediments in formation water containing CO 2 through electrochemical measurements and surface characterization.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Mechanism of L360 Pipeline Steel Coated with S8 in CO2-Cl− System at Different pH Values

Wang

et al. 2021

Metals

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The corrosion behavior of L360 pipeline steel coated with or without elemental sulfur (S8) in CO2–Cl− medium at different pH was studied. An autoclave was used to simulate the working conditions for forming the corrosion scale, and an electrochemical workstation with a three-electrode cell was used to analyze the electrochemical characterization of the corrosion scale. A wire beam electrode was used to determine the potential and current distribution, and scanning electron microscopy and X-ray diffraction were used to characterize the morphology and composition of the corrosion scale. The results showed that the deposition of S8 on the surface of the electrodes caused serious localized corrosion, especially under acidic conditions. The morphology and localized corrosion intensity index further proved that the deposition of S8 significantly promoted corrosion, especially pitting corrosion. Finally, a novel corrosion mechanism of L360 pipeline steel coated with S8 in a CO2-Cl− environment under acidic conditions was proposed, and we then modeled the theoretical mechanisms that explained the experimental results.

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Influence of elemental sulfur on the corrosion mechanism of X80 steel in supercritical CO2-saturated aqueous phase environment

Cited by 20 publications

References 45 publications

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment

First-Principles Study on the Adsorption Characteristics of Corrosive Species on Passive Film TiO2 in a NaCl Solution Containing H2S and CO2

Corrosion Mechanism of L360 Pipeline Steel Coated with S8 in CO2-Cl− System at Different pH Values

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Influence of elemental sulfur on the corrosion mechanism of X80 steel in supercritical CO2-saturated aqueous phase environment

Cited by 20 publications

References 45 publications

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO2 Environment

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO2 Environment

First-Principles Study on the Adsorption Characteristics of Corrosive Species on Passive Film TiO2 in a NaCl Solution Containing H2S and CO2

Corrosion Mechanism of L360 Pipeline Steel Coated with S8 in CO2-Cl− System at Different pH Values

Contact Info

Product

Resources

About

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment

Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO₂ Environment