New Findings on Intergranular Corrosion Mechanism of 445J2 Ultra-Pure Ferritic Stainless Steel

Shang, BingGang; Lei, Longlin; Wang, Xiangyu; He, Pei; Yuan, Xinzhe; Dai, Weihui; Jiang, Yiming; Li, Jin; Sun, Yangting

doi:10.5006/4065

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…Although ferritic stainless steel has better corrosion resistance than martensitic SS and austenitic SS, SPD processes have improved its mechanical properties and corrosion sensitivity (49,50) . Austenitic stainless steels have austenite (FCC) phase at room temperature, are low stacking fault energy (SFE) materials, and their plastic deformation at low temperatures occurs through several mechanisms simultaneously.…”

Section: Stainless Steelmentioning

confidence: 99%

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

Cardonaa

Castillejo

2023

Mater. Trans.

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Ultrafine grained (UFG) and nanostructured steels have gained attention in the last years because of the possibility of improving both strength and ductility, but also because of their potential for improving several properties in metal applications which allows replacing some conventional steels. The refinement of the microstructure obtained through Severe Plastic Deformation (SPD) has allowed for the improvement of mechanical properties and the performing of several studies related to corrosion control, mitigation, and protection. In this review, the corrosion behavior of ultra-fine grained (UFG) steels is presented regarding the existing literature and the microstructural changes produced through different SPD processes. A focus is placed on the importance of the processes for grain refinement and microstructural changes and, therefore, on the corrosion behavior.Keywords: Severe plastic deformation, corrosion behavior, steels Carbon and alloyed steelsCarbon and alloy steels are the most important engineering alloys because they are widely used in many applications. However, they are very susceptible to corrosion environments and require some corrosion control.

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Section: Stainless Steelmentioning

confidence: 99%

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

Cardonaa

Castillejo

2023

Mater. Trans.

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“…In addition to pitting corrosion, intergranular corrosion (IGC) is a common form of localized corrosion (Arutunow, 2012; Khoshnaw and Gardi, 2006; Shang et al , 2022). The IGC susceptibility of austenitic stainless steels kept in a certain temperature range will significantly increase because of the high prone to precipitation (Mudali et al , 1990), which usually happens in the processing (such as heat treatment and welding).…”

Section: Introductionmentioning

confidence: 99%

Investigation on intergranular corrosion susceptibility of a nitrogen-containing austenitic stainless steel QN2109 by optimized DL-EPR tests

Wang

Zhou³

et al. 2023

ACMM

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Purpose The purpose of this study is to investigate the intergranular corrosion (IGC) susceptibility of a nitrogen-containing austenitic stainless steel QN2109. The intergranular corrosion (IGC) susceptibility of a nitrogen-containing austenitic stainless steel QN2109 was investigated. Design/methodology/approach The double-loop electrochemical potentiodynamic reactivation (DL-EPR) tests were carried out. Scanning electron microscopy and atomic force microscopy were used to characterize the microstructure. Findings The optimized test condition for QN2109 was 1 M H2SO4 + 0.01 M NH4SCN at 40°C. The nose temperature of the temperature–time–sensitization (TTS) curve of QN2109 plot was approximately 750°C. Moreover, the IGC susceptibility started to appear at approximately 120 min. The Cr-depletion zone of QN2109 was generated by the formation of M23C6 rather than by the addition of nitrogen. The depth–width ratio of the grain boundaries after the DL-EPR tests decreased as the aging temperature increased. The degree of Cr depletion and size of the Cr-depletion zone at the grain boundary were reflected by the degree of sensitization and depth–width ratio, respectively. Originality/value The optimized test condition for DL-EPR tests of a nitrogen-containing austenitic stainless steel QN2109 was investigated. The TTS curve of QN2109 was first plotted to avoid IGC failure. The morphology of the Cr-depletion zone was reflected by the depth–width ratio.

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Effects of hydrogen charge on the intergranular corrosion of high-defect-density ultrapure ferrite stainless steel

et al. 2023

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New Findings on Intergranular Corrosion Mechanism of 445J2 Ultra-Pure Ferritic Stainless Steel

Cited by 3 publications

References 43 publications

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

An Overview on the Corrosion Behavior of Steels Processed by Severe Plastic Deformation

Investigation on intergranular corrosion susceptibility of a nitrogen-containing austenitic stainless steel QN2109 by optimized DL-EPR tests

Effects of hydrogen charge on the intergranular corrosion of high-defect-density ultrapure ferrite stainless steel

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