Influence of the Solution-Treatment Temperature and Short Aging Times on The Electrochemical Corrosion Behaviour of Uns S32520 Super Duplex Stainless Steel

Valeriano, Lívio de Carvalho; Corrêa, Edmilson Otoni; Mariano, Neide Aparecida; Robin, A.; Machado, Maria A. G. Tommaselli Chuba

doi:10.1590/1980-5373-2018-0774

Cited by 12 publications

(8 citation statements)

References 17 publications

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“…The mechanism of nucleation and growth occurs when the chromium content in the ferrite phase is inferior to 23% (mass) and the thermal treatment of aging is performed above 500°C. For this mechanism, the diffusion occurs with a greater reduction in the Gibbs free energy and phase α' is more roughly formed than in the spinodal decomposition, because of the formation of coherent interfaces (Cavalcanti, Muterlle & Reinke, 2019, Haupt, Silva, Falcade, Santos & Reguly, 2019, Kisasoz, Gurel & Karaaslan, 2016, Mehta, Jadhav, Shaikh, Kumar & Kirwai, 2019, Nithin, Sekar & Joseph, 2019, Ogawa & Osuki, 2020, Powar, Gujar, Manthani, Pawar & Singh, 2017, Valeriano, Correa, Mariano, Robin & Machado, 2019.…”

Section: Introductionmentioning

confidence: 99%

Temperature and time effect of thermal aging treatment on microstructure and corrosion resistance of UNS S31803 duplex stainless steel

Dainezi

Borges

Sousa

et al. 2021

RSD

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Duplex stainless steels correspond to a class of steel in which the microstructure is composed basically by the phases ferrite and austenite. Given the metastable character of ferrite, associated phase transformations can occur during thermal treatments, which can lead to a reduction in corrosion resistance. Therefore, the aim of this work was to evaluate the influence of the solution-treated at 1100°C for 30min and aging at 500 and 600°C for 1, 3 and 12h, on the microstructure and corrosion resistance of DSS UNS S31803. The steels were characterized by SEM, EDS, XRD, hardness, microhardness and thermal analysis. The steels aged at 500°C for 1h presented the phase alpha line dispersed in the ferrite, and the steels aged at 600°C for 12h presented the phases alpha line, sigma and chi. In the assays of double cycle potentiodynamic reactivation in solution of 0.5M H2SO4 and 0.01M KSNC, it was observed that no sensitization occurred. Furthermore, in the tests of cyclic potentiodynamic polarization, in 3.5% NaCl solution, it was verified that the precipitation of the alpha line phase did not alter corrosion resistance; nevertheless, the sigma phase reduced corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Temperature and time effect of thermal aging treatment on microstructure and corrosion resistance of UNS S31803 duplex stainless steel

Dainezi

Borges

Sousa

et al. 2021

RSD

Self Cite

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“…In addition, as a battery casing material, SAF2507 should have excellent electrical conductivity [30,[35][36][37]. However, Fe-based materials typically have low electrical conductivity, necessitating surface plating.…”

Section: Introductionmentioning

confidence: 99%

Study of Electroless Nickel Plating on Super Duplex Stainless Steel for Lithium-Ion Battery Cases: Electrochemical Behaviour and Effects of Plating Time

Shin,

Park,

Kim

et al. 2024

Metals

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With increasing demand for Li-ion batteries, studies are focusing on enhancing battery performance and safety. However, studies on battery cases remain scarce. Herein, we propose the use of super duplex stainless steel SAF2507, which is a two-phase (austenite + ferrite) steel, for battery casings. Unlike conventional AISI304, SAF2507 maintains its corrosion resistance and strength at high temperatures and precipitates a secondary phase at approximately 975 °C. However, the effects of Ni plating on this secondary phase are not well documented. Therefore, the electroless Ni plating of SAF2507 after secondary-phase precipitation was studied. Briefly, heat treatment at 1000 °C was used to induce precipitation, and the electroless Ni plating behaviour over varying plating periods was analysed using open-circuit potential, potentiodynamic polarisation, and electrochemical impedance spectroscopy measurements. The plating state and corrosion behaviour were examined using scanning electron microscopy. Heat-treated SAF2507 steel with a secondary phase exhibited excellent electroless Ni plating behaviour, which enhances the safety and durability of Li-ion batteries. Furthermore, uniform plating and electrochemical behaviour were achieved after 180 s, suggesting that SAF2507 is superior to AISI304. These findings contribute to the development of safer and more efficient batteries and address the growing demand for Li-ion battery case materials.

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“…Among duplex stainless steels, the super duplex stainless steel (SDSS) with a pitting resistance equivalent number (PREN) of 42 showcases outstanding strength and corrosion resistance. It also maintains high-temperature strength exceeding 300 MPa at 700 °C and a low thermal-expansion coefficient (13.5 × 10 −6 ppm/°C) [ 20 , 21 , 22 ]. These attributes significantly enhance the safety of Li-ion battery casings.…”

Section: Introductionmentioning

confidence: 99%

Effect of Secondary Phase on Passivation Layer of Super Duplex Stainless Steel UNS S 32750: Advanced Safety of Li-Ion Battery Case Materials

Shin,

Kim,

Park

et al. 2024

Materials

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Aluminum, traditionally the primary material for battery casings, is increasingly being replaced by UNS S 30400 for enhanced safety. UNS S 30400 offers superior strength and corrosion resistance compared to aluminum; however, it undergoes a phase transformation owing to stress during processing and a lower high-temperature strength. Duplex stainless steel UNS S 32750, consisting of both austenite and ferrite phases, exhibits excellent strength and corrosion resistance. However, it also precipitates secondary phases at high temperatures, which are known to form through the segregation of Cr and Mo. Various studies have investigated the corrosion resistance of UNS S 32750; however, discrepancies exist regarding the formation and thickness of the passivation layer. This study analyzed the oxygen layer on the surface of UNS S 32750 after secondary-phase precipitation. The microstructure, volume fraction, chemical composition, and depth of O after the precipitation of the secondary phases in UNS S 32750 was examined using FE-SEM, EDS, EPMA and XRD, and the surface chemical composition and passivation layer thickness were analyzed using electron probe microanalysis and glow-discharge spectroscopy. This study demonstrated the segregation of alloy elements and a reduction in the passivation-layer thickness after precipitation from 25 μm to 20 μm. The findings of the analysis aid in elucidating the impact of secondary-phase precipitation on the passivation layer.

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Influence of the Solution-Treatment Temperature and Short Aging Times on The Electrochemical Corrosion Behaviour of Uns S32520 Super Duplex Stainless Steel

Cited by 12 publications

References 17 publications

Temperature and time effect of thermal aging treatment on microstructure and corrosion resistance of UNS S31803 duplex stainless steel

Temperature and time effect of thermal aging treatment on microstructure and corrosion resistance of UNS S31803 duplex stainless steel

Study of Electroless Nickel Plating on Super Duplex Stainless Steel for Lithium-Ion Battery Cases: Electrochemical Behaviour and Effects of Plating Time

Effect of Secondary Phase on Passivation Layer of Super Duplex Stainless Steel UNS S 32750: Advanced Safety of Li-Ion Battery Case Materials

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