Hydrostatic pressure effects on stress corrosion cracking of X70 pipeline steel in a simulated deep-sea environment

Yang, Zhou; Kan, Bo; Li, J.X.; Su, Yanjing; Li, Qiao

doi:10.1016/j.ijhydene.2017.09.061

Cited by 45 publications

(8 citation statements)

References 39 publications

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“…During electrochemical tests, the potentiodynamic polarization curves clarify that a higher hydrostatic pressure facilitates the cathodic reaction demonstrated by the increase in cathodic Tafel slopes (βc), and the corrosion process, where the corrosion potential and corrosion current density increase with hydrostatic pressure. The diffusible hydrogen measured on samples by hot extraction after 200h of immersion shows a pressure dependency, as shown in Figure 4 [56].…”

Section: Hydrostatic Pressurementioning

confidence: 95%

Stress corrosion cracking of carbon steels on CO2 /H2 O systems

Tagliari¹,

Craidy²,

Fonseca³

et al. 2021

Tecnol. Metal. Mater. Min.

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Section: Hydrostatic Pressurementioning

confidence: 95%

Stress corrosion cracking of carbon steels on CO2 /H2 O systems

Tagliari¹,

Craidy²,

Fonseca³

et al. 2021

Tecnol. Metal. Mater. Min.

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“…The SCC caused by HE is a severe environmental type of failure that affects almost all metals and alloys [19]. Studies indicated that the cathodic reaction of X70 steel in deep-seawater environments is hydrogen evolution [20,21]. The precipiation of hydrogen may be due to corrosion in aqueous media (including pickling), excessive CP, electroplating (without baking), welding by using damp electrodes, hydrogen gas (if moist) used as a coolant in generators, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen Charging on the Stress Corrosion Cracking Behavior of X70 Steel in Simulated Deep Seawater Environment

Yang

Sun

et al. 2022

Metals

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The effects of hydrogen charging on the electrochemical and stress corrosion cracking (SCC) behavior of X70 steel in a simulated deep seawater environment were investigated by using electrochemical measurements, slow strain rate tensile (SSRT) tests, and corrosion morphology characterization through SEM. The results showed that the concentrations of the adsorbed hydrogen in X70 steel after precharging under different hydrostatic pressures increased gradually and tended to be steady with the charging time. High hydrostatic pressures promoted the hydrogen permeation of X70 pipeline steel by promoting the permeating rate and quantity. The SCC susceptibility of X70 steel decreased first and then increased with the hydrogen-charging current density. The area reduction loss (Iψ) and true strain loss (Iε) exhibited the lowest SCC susceptibility at the 25 mA/cm2 hydrogen-precharging current density. The elongation rate loss (Iδ) exhibited the lowest SCC susceptibility at the 50 mA/cm2 hydrogen-precharging current density.

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“…Much research has been devoted to the influences of the hydrostatic pressure on the corrosion behavior of pipelines. Yang et al − reported that HP could accelerate corrosion by promoting the pitting initiation and propagation of X70 steel, and the stress corrosion cracking susceptibility could increase under elevated HP. Similarly, Sun et al proposed that HP accelerates the cathode hydrogen evolution of X70 steel by changing the permeated hydrogen concentration.…”

Section: Introductionmentioning

confidence: 99%

Coupling Effect of Hydrostatic Pressure and Erosion on Corrosion Behavior of X70 Steel in Simulated Seawater

et al. 2022

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The corrosion behavior of X70 steel under the coupling effect of pressure and erosion in simulated seawater was investigated by using corrosion loss, electrochemical tests, SEM, AFM, XPS, and Raman spectroscopy. The coupling effect of pressure and erosion could induce changes in the amounts and compositions of the corrosion products and increase pitting. The rate of the combined corrosion of X70 steel represents a downtrend, which still displays a higher corrosion rate than only immersion at the same pressure. This means that the coupling of pressure and erosion will accelerate corrosion, but the effect of erosion is weakened by pressure. The larger the pressure is, the more erosion is weakened. The pressure reduces the water cutting force by increasing the liquid viscosity and reduces the surface hardness changes under high pressure by generating magnetite, which is closely bound to the substrate.

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Hydrostatic pressure effects on stress corrosion cracking of X70 pipeline steel in a simulated deep-sea environment

Cited by 45 publications

References 39 publications

Stress corrosion cracking of carbon steels on CO2 /H2 O systems

Stress corrosion cracking of carbon steels on CO2 /H2 O systems

Effect of Hydrogen Charging on the Stress Corrosion Cracking Behavior of X70 Steel in Simulated Deep Seawater Environment

Coupling Effect of Hydrostatic Pressure and Erosion on Corrosion Behavior of X70 Steel in Simulated Seawater

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