Study on pitting corrosion behavior and semi in-situ pitting corrosion growth model of 304 L SS with elastic stress in NaCl corrosion environment

Li, Jiadong; Lin, Bing; Zheng, Hongpeng; Wang, Yingying; Zhang, Hailong; Zhang, Yanna; Nie, Zhen; Tang, Junlei

doi:10.1016/j.corsci.2022.110862

Cited by 26 publications

(20 citation statements)

References 90 publications

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“…High stress levels also resulted in a higher density of corrosion pits on the 316LN surface, leading to the amalgamation of adjacent pits into larger ones. This suggests that tensile stress intensifies the defect density within the passive film, as supported by recent findings (Li et al , 2023). Moreover, the passive film under applied stress, would elongate and thin because it is not completely brittle (Fajardo et al , 2014).…”

Section: Resultssupporting

confidence: 85%

“…Moreover, Figures 12(a) and 13(a) illustrate that under identical stress conditions, the capacitive reactance arc radius for 316L is considerably smaller than that for 316LN. Analysis of Figures 15 and 16 reveals that for 316L, both the R ct and the constant phase element parameter (CPE-T) are less than those for 316LN, suggesting that the presence of nitrogen in 316LN enhances the passivation layer’s completeness and stability against external stress (Lee and Yoon, 2010; Metikoš-Huković et al , 2011; Li et al , 2023). The Bode plots of Figures 12(b) and 13(b) under 0 MPa and 50 MPa have the similar related plateau of phase angle 0 Hz to 1000 Hz at approximately 80°C.…”

Section: Resultsmentioning

confidence: 99%

“…The EDS results in Figure 17 reveal the presence of chlorine (Cl) and oxygen (O) within the pit microstructures, suggesting that the dissolution of iron (Fe) and chromium (Cr) occurs within these pits, forming metal oxides and chlorides. Furthermore, high tensile stress appears to augment the oxygen diffusion rate across the passivation film (Li et al , 2023).…”

Section: Resultsmentioning

confidence: 99%

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Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions

Rao,

Zhang,

Zhao

et al. 2024

ACMM

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Purpose This paper aims to explore the influence of corrosion-deformation interactions (CDI) on the corrosion behavior and mechanisms of 316LN under applied tensile stresses. Design/methodology/approach Corrosion of metals would be aggravated by CDI under applied stress. Notably, the presence of nitrogen in 316LN austenitic stainless steel (SS) would enhance the corrosion resistance compared to the nitrogen-absent 316L SS. To clarify the CDI behaviors, electrochemical corrosion experiments were performed on 316LN specimens under different applied stress levels. Complementary analyses, including three-dimensional morphological examinations by KH-7700 digital microscope and scanning electron microscopy coupled with energy dispersive spectroscopy, were conducted to investigate the macroscopic and microscopic corrosion morphology and to characterize the composition of corrosion products within pits. Furthermore, ion chromatography was used to analyze the solution composition variations after immersion corrosion tests of 316LN in a 6 wt.% FeCl3 solution compared to original FeCl3 solution. Electrochemical experiment results revealed the linear decrease in free corrosion potential with increasing applied stress. Electrochemical impedance spectroscopy results indicated that high tensile stress level damaged the integrity of passivation film, as evidenced by the remarkable reduction in electrochemical impedance. Ion chromatography analyses proved the concentrations increase of NO3− and NH4+ ion concentrations in the corrosion media after corrosion tests. Findings The enhanced corrosion resistance of 316LN SS is attributable to the presence of nitrogen. Research limitations/implications The scope of this study is confined to the influence of tensile stress on the electrochemical corrosion of 316LN at ambient temperatures; it does not encompass the potential effects of elevated temperatures or compressive stress. Practical implications The resistance to stress electrochemical corrosion in SS may be enhanced through nitrogen alloying. Originality/value This paper presents a systematic investigation into the stress electrochemical corrosion of 316LN, marking the inaugural study of its impact on corrosion behaviors and underlying mechanisms.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions

Rao,

Zhang,

Zhao

et al. 2024

ACMM

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“…Electrochemical testing is used to characterize the corrosion properties of a sample. Pitting corrosion is one of the important failure forms of stainless steel, and Cl − is a typical pitting corrosion-inducing factor for stainless steel [ 23 , 24 , 25 , 26 ]. The electrochemical test was performed in a 3.5% sodium chloride solution at 25 °C.…”

Section: Methodsmentioning

confidence: 99%

Effect of Scanning Strategy on the Manufacturing Quality and Performance of Printed 316L Stainless Steel Using SLM Process

Zheng,

Sun,

Mao

2024

Materials

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In this study, the effects of Z-0°, Z-67°, Z-90°, I-67°, and S-67° scanning strategies on the surface morphology, microstructure, and corrosion resistance of the specimens in SLM316L were systematically studied. The results show that the partition scanning path can effectively improve the manufacturing quality of the specimen, reduce the cumulative roughness layer by layer, and increase the density of the specimen. The scan path of the island partition of the fine partition is better than that of the strip partition; moreover, the 67° rotation between each layer reduces the accumulation of the height difference of the melt pool, fills the scanning gap of the previous layer, and improves the molding quality of the sample. Electrochemical tests were performed in an aqueous solution of NaCl (3.5 wt%), including open-circuit potential (OCP), dynamic potential polarization, and electrochemical impedance spectroscopy (EIS). The results show that the specimen with a 67° rotation between each layer achieves stability of the surface potential in a short time, and the I-67° specimen exhibits good corrosion performance, while the Z-0° specimen has the worst corrosion resistance.

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“…A work conducted on austenite stainless steel 304L and 316L that pit morphology is influenced by the value of RH, at smaller RH values satellite and earing pits are obtained whereas at upper RH only pits of circle shape are determined (Mohammad-Ali, 2016). More recent works have been reported regarding the atmospheric corrosion and the microstructure of stainless steel (Zhu et al, 2020;Wang and Wang, 2021;Devaraj, 2022;Li et al, 2022;Sheik et al, 2022;Yoon and Ahn, 2022;Moreıra et al, 2023) The novelty of this work lies in its focus on the role of relative humidity variation with the microstructure on atmospheric pitting corrosion of duplex stainless steel plate grade 2205 under droplets of MgCl2.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure and Relative Humidity on Atmospheric Pitting Corrosion of Duplex Stainless Steel Beneath Mgcl2 Drops

Ali

2023

SJUOZ

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One of the main issues for intermediate-level nuclear waste (ILW) is atmospheric corrosion in stainless steel. The impact of microstructure on the pit shapes on three orientations of the duplex stainless steel DSS 2205 plate and the relative humidity impact on the atmospheric corrosion pits of DSS beneath MgCl2 drops is determined through the use of four characterization tools: X-ray diffraction (XRD), Energy dispersive X-ray (EDX) analyses, Scanning electron microscopy (SEM), and optical microscopy. The pits on the top surface (LT) appears layered like an attack and mostly hemispherical, while the long transverse (LS) and short transverse (ST) planes reveal elongated strings. The map scan of EDX indicates mixed oxide inclusions and MnS inclusion existing in the steel alloy and the XRD analyses present the existence of two-phase both austenite γ and ferrite α peaks. The pit shape and area were influenced by relative humidity (RH) change. At RH 35% the trend of pits in 1-week exposure revealed a larger area of pit mouth than in RH 45%. For the same exposure time and in both RHs, the area seemed to be greater at the droplet’s center than in the edge of the droplet.

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Study on pitting corrosion behavior and semi in-situ pitting corrosion growth model of 304 L SS with elastic stress in NaCl corrosion environment

Cited by 26 publications

References 90 publications

Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions

Investigations on corrosion behavior of 316LN and 316L austenitic stainless steel under corrosion-deformation interactions

Effect of Scanning Strategy on the Manufacturing Quality and Performance of Printed 316L Stainless Steel Using SLM Process

Effect of Microstructure and Relative Humidity on Atmospheric Pitting Corrosion of Duplex Stainless Steel Beneath Mgcl2 Drops

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