Corrosion behavior and mechanism of X80 pipeline steel welded joints under high shear flow fields

Dou, Xiaohui; He, Zonghao; Zhang, Xinwei; Liu, Yingshuang; Liu, Ran; Tan, Zhuowei; Zhang, Dalei; Li, Yan

doi:10.1016/j.colsurfa.2023.131225

Cited by 16 publications

(3 citation statements)

References 53 publications

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“…The key to improving the corrosion resistance of welded joints is avoiding the change in the root pass microstructure caused by tempering in the multi-pass welding process [20]. The heat-affected zone (HAZ) shows the worst corrosion resistance, whereas the base metal (BM) and weld metal (WM) show similar corrosion resistance [21].…”

Section: Free Corrosion Potential Of Welded Jointsmentioning

confidence: 99%

Corrosion Performance of Welded Joints for E40 Marine Steel

Li,

Wu,

Sun

2023

Metals

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Marine steel requires excellent toughness and corrosion resistance in a low-temperature seawater environment. In this study, corrosion tests on E40 steel were performed, including electrochemical testing of the weld metal and heat-affected zone, dynamic corrosion testing in a simulated seawater environment, and the analysis and comparison of results obtained using different methods. The corrosion resistance of E40 was determined by measuring the saturation current density of the anodic dissolution of the steel in a corrosive medium by an electrochemical method. Under laboratory conditions, the corrosion resistance was investigated under simulated seawater. The results showed that regions with uneven microhardness corresponded to the inhomogeneity of the corrosion potential, with measured fluctuations of up to 40 mV. Nanoscale corrosive–aggressive non-metallic inclusions served as a substrate for the deposition of titanium and niobium carbonitrides, thereby weakening the corrosion resistance. The corrosion rate of the base metal was 1.16–1.64 mm/year, which was slightly higher than that of the heat-affected zone. The influence of deposition on the corrosion performance of welded joints under different deoxygenation processes was studied, and the deposition composition was controlled by a deoxygenation process to improve the corrosion resistance of the steel plate.

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Section: Free Corrosion Potential Of Welded Jointsmentioning

confidence: 99%

Corrosion Performance of Welded Joints for E40 Marine Steel

Li,

Wu,

Sun

2023

Metals

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“…More recent studies have shown that, in addition to the flow velocity, different fluid regimes, such as bubbly flow, plug flow, stratified flow, wavy flow, and slug flow, play an important role in determining the FAC behavior [27,28]. It has been reported that different flow regimes can be converted into wall shear stress and fluid impact energy [29,30]. Usually, it is found that the wall shear stress and the impact energy of fluids increase with increasing flow velocity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Roughness on the Corrosion of HP-13Cr Stainless Steel in the Dynamic Aggressive Oilfield Environment

Wang,

Xue,

Zhao

et al. 2024

Metals

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The effects of surface roughness on the corrosion mechanism of HP-13Cr stainless steel in the dynamic aggressive oilfield environment were investigated through surface analysis, weight-loss measurements, and computational fluid dynamics simulations. The results showed that the surface roughness mainly changed the fluid state at the metal/solution interface. With the increase in the surface roughness, the vortex was more likely to form at the trough of the waves. The vortex could result in the deposition process and inhomogeneity in the thickness of the oxide film. The pitting corrosion occurred more easily. Furthermore, the temperature and CO2 pressure obviously facilitated the corrosion rate.

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“…The welded joint of oil and gas transmission pipeline is a non-uniform structure composed of BM, HAZ and WM [1]. Due to the differences of electrochemical properties in different areas, welded joints are often the weakest link in pipeline engineering under the internal corrosion environment and coupling conditions of load and residual stress.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Corrosion of X80 Steel under High Shear Flow Fields

Dou,

Zhang,

2023

J. Phys.: Conf. Ser.

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Corrosion failure accidents owing to flow erosion and pipeline corrosion frequently occur during transportation. In this study, a high wall shear stress (WSS) experimental setup was established to conduct the online electrochemical corrosion test. The corrosion behavior of welded joints in NACE solution was studied by electrochemical experimental methods such as electrochemical impedance spectroscopy (EIS) and wire harness microelectrode (WBE). The results show that different areas of the welded joint show different corrosion phenomena in NACE solution. The weld metal (WM) has the significantly better corrosion resistance, while the base metal (BM) and heat-affected zone (HAZ) have worst corrosion resistance than WM. The current of the WM surface was cathodic current, while the current of the BM and HAZ surface were anode currents.

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Corrosion behavior and mechanism of X80 pipeline steel welded joints under high shear flow fields

Cited by 16 publications

References 53 publications

Corrosion Performance of Welded Joints for E40 Marine Steel

Corrosion Performance of Welded Joints for E40 Marine Steel

Effect of Surface Roughness on the Corrosion of HP-13Cr Stainless Steel in the Dynamic Aggressive Oilfield Environment

CO₂ Corrosion of X80 Steel under High Shear Flow Fields

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Corrosion behavior and mechanism of X80 pipeline steel welded joints under high shear flow fields

Cited by 16 publications

References 53 publications

Corrosion Performance of Welded Joints for E40 Marine Steel

Corrosion Performance of Welded Joints for E40 Marine Steel

Effect of Surface Roughness on the Corrosion of HP-13Cr Stainless Steel in the Dynamic Aggressive Oilfield Environment

CO2 Corrosion of X80 Steel under High Shear Flow Fields

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CO₂ Corrosion of X80 Steel under High Shear Flow Fields