Stress corrosion cracking and corrosion fatigue analysis of API X70 steel exposed to a circulating ethanol environment

Santos, Elielson A. dos; Giorgetti, Vinícius; Júnior, Celso A.de.S.; Marcomini, José Benedito; Sordi, Vitor Luiz; Rovere, Carlos Alberto Della

doi:10.1016/j.ijpvp.2022.104846

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Constant-stress loading tests (CSLT) are often used as the experimental basis for the stress-corrosion behavior research of steel, aluminum alloy, and titanium alloy [22][23][24]. For the steel tested in the NaCl solution, the fracture may occur within a short time due to its relatively low corrosion resistance, and the fractured time is used to evaluate the SCC resistance [23].…”

Section: Constant-stress Loading Test Resultsmentioning

confidence: 99%

Section: Constant-stress Loading Test Resultsmentioning

confidence: 99%

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Influence of Phase Composition on Stress-Corrosion Cracking of Ti-6Mo-5V-3Al-2Fe-2Zr Alloy in 3.5% NaCl Solution

et al. 2022

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The metastable β titanium alloys used in marine engineering applications suffered from stress-corrosion cracking in seawater. The different phase composition leads to the distinct stress-corrosion cracking behaviors of the alloy. In this work, the influence of the phase composition on the stress-corrosion cracking of a novel metastable β titanium alloy Ti-6Mo-5V-3Al-2Fe-2Zr was investigated. The alloys with different phase compositions were prepared by three types of thermal-mechanical processing, i.e., the single β phase (assigned as M(β)), the β phase plus fine α phase (assigned as M(β+fα)), and the β phase plus coarsened α phase (assigned as M(β+cα)). The electrochemical tests and constant-stress loading tests were performed, and the phase composition and microstructure were analyzed by XRD and SEM. The M(β) alloy exhibits the best corrosion resistance as well as the compact properties of oxide films, followed by the M(β+fα) alloy and the M(β+cα) alloy. Tear ridges and a flat facet with an undulating surface were observed on the stress-corrosion cracking fracture surface, which indicated the occurrence of high-degree dislocations movement and localized plastic deformation. Absorption-induced dislocation emission (AIDE) and hydrogen-enhanced localized plasticity (HELP) are the primary mechanisms for the stress-corrosion cracking of the alloy. The increased amount of β phase has a beneficial effect on stress-corrosion cracking resistance. For the alloy with β and α phases, the α phase with wider spacing has an adverse effect on stress corrosion performance.

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Section: Constant-stress Loading Test Resultsmentioning

confidence: 99%

Section: Constant-stress Loading Test Resultsmentioning

confidence: 99%

Influence of Phase Composition on Stress-Corrosion Cracking of Ti-6Mo-5V-3Al-2Fe-2Zr Alloy in 3.5% NaCl Solution

et al. 2022

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“…The results showed that there was high corrosion of carbon steel and there was exfoliation of the rust layer. There was reduction in exfoliation of the weathering and alloy steel rust layers as well as enrichment of chromium in the inner layer which led to acceleration of compact and protectiveness in the rust layers [25]. Also, cracks were prevented in the environment.…”

Section: Alloy Steel Performance In Corrosive Environmentmentioning

confidence: 99%

Emerging Behaviour of Alloy Steel Microstructure in Hydrogen Sulphide Environment - A Review

Lawal,

Afolalu,

Jen

et al. 2024

SSP

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Alloy steel is known to be different from carbon steel due to the presence of the alloying element in varying compositions which is usually done for the purpose of modifying and improving the performance of the steel. However, a major problem with the alloy steel is that it usually exhibits different behavior in terms of the microstructures and the mechanical properties, especially, in sulphide environment. Thus, this study focused on the different microstructure of alloy steel and their performance in different environment with strong emphasis in sulphide environment. It was established in the study that a major problem of alloy steel in hydrogen sulphide environment is the sulphide stress cracking which is attributed to the presence of hydrogen and its absorption by the alloy steel. Hence, this study provides a potential guide and information on the capacity of the grades of alloy steel that can thrive in sulphide environment.

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“…However, in different well-fluid environments, there may be different relationships between the corrosion behavior of different material surfaces and their stress corrosion susceptibility. Some researchers studied the stress corrosion resistance of high-strength steel, aluminum alloys, and magnesium alloys, measuring the stress corrosion resistance characteristics of specific materials in specific environments [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. However, in these studies, the material stress was constant, and the stress and corrosion environments were greatly different from the working environment of a high-strength sucker rod.…”

Section: Introductionmentioning

confidence: 99%

Study on Variable Stress Corrosion Susceptibility of Four Typical High-Strength Sucker Rods in High-Salinity Well Fluids

Zhang,

Li,

Zhu

et al. 2023

Processes

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To study the corrosion characteristics of high-strength sucker rods in high-salinity well fluids under alternating stresses, a single-factor stress corrosion test was designed. The slow strain rate tensile test (SSRT) was carried out for four kinds of high-strength sucker rods under different Cl− and HCO3− concentrations and with different service strengths, and the variable stress corrosion cracking susceptibility was analyzed. The results show that the elongation loss and absorbed work loss of the H-grade ultra-high-strength 4330 sucker rod after stress corrosion are greater than those of both the high-strength 4142 sucker rod and the high-strength 20CrMoA sucker rod. The elongation and absorbed work loss of the 30CrMoA and 20CrMoA sucker rods are less affected by the changes in Cl− and HCO3−. With the increase in use strength, the elongation and absorbed work loss of the high-strength sucker rod increase. The change in the surface of the sucker rod during the corrosion process is inconsistent with the actual elongation of the sucker rod and the absorbed work loss. It can be concluded that the stress corrosion cracking susceptibility of the sucker rod is not necessarily related to the tensile strength of the sucker rod. The 4330 sucker rod is not suitable for applications in wells with a high concentration of Cl−, but it is suitable for operation in alkaline conditions where corrosive media such as HCO3− and Cl− coexist. Under highly corrosive and highly mineralized conditions, the 30CrMoA sucker rod is less susceptible to stress corrosion. The stress corrosion cracking susceptibility of the 20CrMoA sucker rod is lower than that of the 4142 sucker rod. In high-salinity well fluids, the higher the use strength, the higher the stress corrosion cracking susceptibility of the high-strength sucker rod is. The test results for the weight-loss-based corrosion rate and plastic loss may contradict the determination of the corrosion susceptibility of the material under working conditions.

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Stress corrosion cracking and corrosion fatigue analysis of API X70 steel exposed to a circulating ethanol environment

Cited by 9 publications

References 24 publications

Influence of Phase Composition on Stress-Corrosion Cracking of Ti-6Mo-5V-3Al-2Fe-2Zr Alloy in 3.5% NaCl Solution

Influence of Phase Composition on Stress-Corrosion Cracking of Ti-6Mo-5V-3Al-2Fe-2Zr Alloy in 3.5% NaCl Solution

Emerging Behaviour of Alloy Steel Microstructure in Hydrogen Sulphide Environment - A Review

Study on Variable Stress Corrosion Susceptibility of Four Typical High-Strength Sucker Rods in High-Salinity Well Fluids

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