Experimental investigation on dissimilar weld between super duplex stainless steel 2507 and API X70 pipeline steel

Khan, Waris Nawaz; Chhibber, Rahul

doi:10.1177/14644207211013056

Cited by 13 publications

(1 citation statement)

References 23 publications

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“…Duplex stainless steels perform well in many corrosive environments with superior localised corrosion resistance. Due to their exceptional toughness properties in harsh service conditions, API-grade pipeline steel and dissimilar weld joints manufactured by DSS are both widely used in offshore applications [5].…”

Section: Introductionmentioning

confidence: 99%

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Mishra,

Sharma,

Chhibber

2023

Preprint

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The current research aims to develop and investigate the wettability behaviour of the fluxes used to coat shielded metal arc welding electrodes for offshore applications. Weld characteristics on duplex stainless steel are significantly affected by the flux's wettability characteristics. The wetting properties of SMAW electrode coatings were measured using the sessile drop technique. Twenty-six flux constituents of coatings have been formulated using the mixture design approach. At a temperature of 1423 K, the contact angle, spread area, surface tension, and adhesion work are measured. X-ray diffraction (XRD) analytical techniques and Fourier transform infrared spectroscopy (FTIR) analysis were employed to determine the phases present in various types of fluxes. The influence of electrode coating flux compositions on different wetting parameters was examined using statistical models. It was observed that CaO, SiO2, and TiO2 individually have an increasing impact on contact angle, whereas MgO has a decreasing effect. CaO.MgO, SiO2.MgO, and TiO2.MgO is the only binary constituent increasing the contact angle. CaO and TiO2 exhibit increasing impacts, whereas SiO2 and MgO have a decreasing impact on the spread area. CaO.SiO2, SiO.TiO2, SiO.MgO, and TiO2.MgO interactions have increasing effects, while other binary interactions show decreasing effects on the spread area. Individual constituents have a positive effect on surface tension. MgO is the only constituent that increases the work of adhesion, and other constituents decrease it. Interactions like CaO, SiO2, CaO, TiO2, and SiO2.TiO2 has an increasing impact on adhesion work, while other binary interactions show a negative effect. Utilizing an artificial neural network approach, the mean square error (MSE) and mean absolute percentage error (MAPE) values for the predicted outcome were effectively minimized. ANN model prediction was compared to regression prediction.

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Section: Introductionmentioning

confidence: 99%

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Mishra,

Sharma,

Chhibber

2023

Preprint

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Corrosion performance of super duplex stainless steel and pipeline steel dissimilar welded joints: a comprehensive investigation for marine structures

Maurya,

Pandey,

Chhibber

et al. 2024

Int J Adv Manuf Technol

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This study investigates the corrosion behavior of dissimilar gas tungsten arc (GTA) welded joints between super duplex stainless steel (sDSS 2507) and pipeline steel (X-70) using electrochemical and immersion corrosion tests. The GTA welds were fabricated using ER2594 and ER309L filler metals. The study examined the electrochemical characteristics and continuous corrosion behavior of samples extracted from various zones of the weldments in a 3.5 wt.% NaCl solution, employing electrochemical impedance spectroscopy, potentiodynamic polarization methods, and an immersion corrosion test. EIS and immersion investigations revealed pitting corrosion in the X-70 base metal/X-70 heat-affected zone, indicating inferior overall corrosion resistance due to galvanic coupling. The corrosion byproducts identified in complete immersion comprised α-FeOOH, γ-FeOOH, Fe3O4, and Fe2O3, whereas γ-FeOOH and Fe3O4 were predominant in dry/wet cyclic conditions. Corrosion escalated with dry/wet cycle conditions while maintaining a lower level in complete immersion. The corrosion mechanism involves three wet surface stages in dry/wet cycles and typical oxygen absorption during complete immersion. Proposed corrosion models highlight the influence of Cl−, O2, and rust layers.

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Study on microstructure–mechanical integrity of the dissimilar gas tungsten arc weld joint of sDSS 2507/X-70 steels for marine applications

et al. 2023

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Experimental investigation on dissimilar weld between super duplex stainless steel 2507 and API X70 pipeline steel

Cited by 13 publications

References 23 publications

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Wettability study of Developed Silicon based SMAW Electrode Coating Fluxes using SiO 2 -CaO-TiO 2 and SiO 2 -CaO-MgO Ternary System

Corrosion performance of super duplex stainless steel and pipeline steel dissimilar welded joints: a comprehensive investigation for marine structures

Study on microstructure–mechanical integrity of the dissimilar gas tungsten arc weld joint of sDSS 2507/X-70 steels for marine applications

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