Influence of annealing treatment on the corrosion resistance of lean duplex stainless steel 2101

Zhang, Lihua; Zhang, Wei; Jiang, Yiming; Deng, Bo; Sun, Defeng; Li, Jin

doi:10.1016/j.electacta.2009.04.023

Cited by 132 publications

(75 citation statements)

References 19 publications

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“…33,35,36,41,42,46,47 Similar observations of selective attack on the ferrite phase have also been reported on lean DSS 2101 and 2202. 2,48,49 In lean DSS 2202, the measured corrosion depthto-area ratio was low, indicating a strong tendency for repassivation of active corrosion sites. However, both the corroded area and volume for the lean 2202 wire were larger than for all the 2205 wires indicating lower corrosion resistance.…”

Section: Discussionmentioning

confidence: 99%

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

et al. 2018

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Corrosion rates of strained grade UNS S32202 (2202) and UNS S32205 (2205) duplex stainless steel wires have been measured, in situ, using time-lapse X-ray computed tomography. Exposures to chloride-containing (MgCl 2 ) atmospheric environments at 50°C (12-15 M Cl − and pH~5) with different mechanical elastic and elastic/plastic loads were carried out over a period of 21 months. The corrosion rates for grade 2202 increased over time, showing selective dissolution with shallow corrosion sites, coalescing along the surface of the wire. Corrosion rates of grade 2205 decreased over time, showing both selective and pitting corrosion with more localised attack, growing preferentially in depth. The nucleation of stress corrosion cracking was observed in both wires.

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Section: Discussionmentioning

confidence: 99%

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

et al. 2018

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“…The influence on heat treatment prior to exposure has been widely described [11], [22], [28], [29]. Under supercritical CO 2 conditions a martensitic microstructure of hardened and tempered 1.4542 at low temperatures (650 °C) (< 0.001 mm/year) and under saline water normalized microstructure (ca.…”

Section: A Kinetics Of Static Corrosion Experimentsmentioning

confidence: 99%

“…high Ni-and Cr contents [26], [27] improve general corrosion resistance as well as retained austenite improves pitting corrosion resistance [26]. Higher austenitizing temperature of martensitic steels [28]- [30] as well as higher annealing temperature of lean duplex stainless steels [22], [23], [28] decrease the pitting potential. Due to reactive grain boundaries in martensitic microstructure C-Mn (carbon) steels in a H 2 S-containing NaCl solution shows higher corrosion rates than ferritic or ferritic-bainitic microstructures [31].…”

Section: Introductionmentioning

confidence: 99%

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Pfennig¹,

Kranzmann²

2017

IJESD

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Abstract-Pipe steels suitable for carbon capture and storage technology (CCS) require resistance against the corrosive environment of a potential CCS-site (heat, pressure, salinity of the aquifer, CO 2 -partial pressure). X5CrNiCuNb16-4 has been proven to be sufficient resistant in corrosive environments, but shows rather unusual corrosion behaviour in CCS environment. Therefore differently heat treated coupons of 1.4542 were kept at T=60 °C and ambient pressure as well as p=100 bar for 700 h -8000 h in an a) water saturated supercritical CO 2 and b) CO 2 -saturated synthetic aquifer environment similar to on-shore CCS-sites in the Northern German Basin. Additionally fatigue tests were performed via push-pull tests with a series of 30 specimens was tested at stress amplitudes between 150 MPa and 500 MPa (sinusoidal dynamic test loads, R=-1; resonant frequency ~ 30 Hz). Best corrosion resistance in the liquid phase is achieved via normalizing prior to exposure and hardening+tempering at 670 °C leads to lowest corrosion rates in the supercritical phase. With no regard to atmosphere discontinuously ellipsoidal surface corrosion regions appear after exposure of 4000 h and more. The endurance limit of X5CrNiCuNb16-4 measured in air is reduced by more than 50% when exposed to CCS environment (maximum number of cycles (10 x 10 6 ) at a stress amplitude of 150 MPa) The scatter range TN = 1:34 is disproportionately large contributing to an overall unusual corrosion behaviour Index Terms-Corrosion, CCS, carbon storage, aquifer, heat treatment, fatigue, endurance limit.

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“…In Fig. 10, in a potential close to 0.00 V, the sample as received (matrix) and heat treated for 30 mins show a behavior similar on the Cr 2 O 3 passive layer formation, while the samples which were heat treated for 360 mins and 1,440 mins presents a significant increase in current density [14,15]. These results suggests that the heat treatment for long time lapses reduce the formation of the passive layer, once the available chromium for the formation of the passive layer is precipitated on σ phase, establishing that inappropriate heat treatments may damage the UNS S31830 corrosion resistance.…”

Section: Potentiodynamic Polarization In Nacl 5%mentioning

confidence: 97%

“…For the sample heat treated for 30 mins, a quick deterioration is observed, suggesting to be an effect of the γ 2 formation, since this phase is formed on chromium depleted regions on σ phase, because the chromium and molybdenum diffusion is inferior on γ 2 phase, when compared to δ phase [16]. For the samples heat treated for 360 mins and 1,440 mins, it is suggested that the decrease of the pitting potential and increase of current density on UNS S31830 steel is due to fact of an increase of σ phase, containing elevated concentrations of chromium and molybdenum, reducing the formation of a Cr 2 O 3 passive layer [14][15][16].…”

Section: Potentiodynamic Polarization In Nacl 5%mentioning

confidence: 99%

Intergranular Corrosion of UNS S31803 Heat Treated at 800 °C Varying Range Times

Dias¹,

Santos²,

Viana³

2015

JCCE

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Abstract:The aim of this work is evaluate the intergranular corrosion on UNS S31803 steel, with heat treatments at 800 °C, varying treatment times of 30 mins, 360 mins and 1,440 mins. The results confirm the formation of σ phases and secondary austenite (γ 2 ). For the analysis of the influence of σ and γ 2 phases, metallographic analysis were conducted through optical microscopy, potentiokinetic reactivation electrochemical techniques and potentiodynamic polarization in NaCl 3.5% solution. Microstructural analysis has shown a formation of γ 2 and σ phase in heat treatment, due to diffusion of chromium and molybdenum from δ phase to γ phase, precipitating on δ/γ and δ/δ interfaces. The DL-EPR (Double loop electrochemical potentiokinetic reactivation) results have shown an increase of the DOS (degree of sensitization) for long periods of time on heat treatment. The results of potentiodynamic polarization showed a reduction of the corrosion and pitting potentials, followed by an increase of the current density when the UNS S31830 steel is heat treated during long periods of time.

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Influence of annealing treatment on the corrosion resistance of lean duplex stainless steel 2101

Cited by 132 publications

References 19 publications

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

Time-dependent in situ measurement of atmospheric corrosion rates of duplex stainless steel wires

Potential of Martensitic Stainless Steel X5CrNiCuNb 16-4 as Pipe Steel in Corrosive CCS Environment

Intergranular Corrosion of UNS S31803 Heat Treated at 800 °C Varying Range Times

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