Effect of grain refinement and electrochemical nitridation on corrosion resistance of the 316L stainless steel for bipolar plates in PEMFCs environment

Jinlong, Lv; Liang, Tongxiang; Luo, Hongyun

doi:10.1016/j.jpowsour.2015.06.006

Cited by 29 publications

(4 citation statements)

References 25 publications

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“…The spectra for the N1s core levels of samples N and NK are shown in Figures 2(a) and 2(b), respectively. The spectra unequivocally confirm the formation of chromium nitride species as observed at 397.6 eV which is in good agreement with the literature [31,32]. In addition, the peak at higher binding energies is ascribed to NH 3 groups that are present in smaller fractions when compared to chromium nitrides.…”

Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 89%

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Rocha

Pereira

Oliveira

et al. 2019

International Journal of Corrosion

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The relationship between the surface chemistry and the corrosion resistance of electrochemically nitrided AISI 304 stainless steel samples has been investigated. The nitriding treatment was carried out in HNO3 0.1 M and HNO3 0.1 M + KNO3 0.5 M at room temperature. Samples were subjected to the nitriding procedure for 30 minutes under a cathodic potential of -0.7 VAg/AgCl. The chemical composition of the nitrided layers was assessed by X-ray photoelectron spectroscopy (XPS). Depth profiles of the main elements present in the nitrided layers were also obtained by XPS by etching them with argon ions. The corrosion behavior of the nitrided samples was evaluated by potentiodynamic polarization. The results showed that the nitrided layers consisted of a mixture of chromium nitrides, chromium oxides, iron oxides/oxyhydroxides, and nickel oxide. The best corrosion resistance was obtained by electrochemical nitriding in the HNO3 0.1 M + KNO3 0.5 M solution. This result could be correlated with the composition and thickness of the nitrided layer.

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Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 89%

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Rocha

Pereira

Oliveira

et al. 2019

International Journal of Corrosion

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“…However, grain refinement has been found to lead to better chemical homogeneity. 93,94 On the other hand, the increase in grain boundary population could destabilize the passive film and compromise the corrosion resistance. 92,95 Abbasi Aghuy et al 96 found that grain refinement has no effect on the pitting potential of a 304 SS in 3.5 wt% NaCl, but increases metastable pit stability.…”

Section: Grain Structurementioning

confidence: 99%

Pitting Corrosion in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Additive Manufacturing: A Review and Perspective

Voisin

Shi

Zhu

et al. 2022

JOM

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Abstract316L stainless steel (316L SS) is a flagship material for structural applications in corrosive environments, having been extensively studied for decades for its favorable balance between mechanical and corrosion properties. More recently, 316L SS has also proven to have excellent printability when parts are produced with additive manufacturing techniques, notably laser powder bed fusion (LPBF). Because of the harsh thermo-mechanical cycles experienced during rapid solidification and cooling, LPBF processing tends to generate unique microstructures. Strong heterogeneities can be found inside grains, including trapped elements, nano-inclusions, and a high density of dislocations that form the so-called cellular structure. Interestingly, LPBF 316L SS not only exhibits better mechanical properties than its conventionally processed counterpart, but it also usually offers much higher resistance to pitting in chloride solutions. Unfortunately, the complexity of the LPBF microstructures, in addition to process-induced defects, such as porosity and surface roughness, have slowed progress toward linking specific microstructural features to corrosion susceptibility and complicated the development of calibrated simulations of pitting phenomena. The first part of this article is dedicated to an in-depth review of the microstructures found in LPBF 316L SS and their potential effects on the corrosion properties, with an emphasis on pitting resistance. The second part offers a perspective of some relevant modeling techniques available to simulate the corrosion of LPBF 316L SS, including current challenges that should be overcome.

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“…The mass loss of the untreated and LSMed samples in deionised water is 35 ± 1 and 14 ± 0.3 mg, whereas the mass loss in 3.5 wt% NaCl solution is 40 ± 0.6 and 20 ± 0.3 mg after 8-h CE, respectively. The mean depth of erosion ( MDE ) and the mean depth of erosion rate ( MDER ) can be used to evaluate CE resistance and calculated as follows: 3–57 where Δw is the mass loss (mg), ρ is the density of the materials (g/cm 3 ), s is the eroded area (1 cm 2 in this study), Δ T is the interval time (h), MDE in μm and MDER in μm/h. The CE resistance R e (h μm −1 ) is the reciprocal of MDER.…”

Section: Resultsmentioning

confidence: 99%

“…Because of these grain boundaries acting as obstacles, the crack formed on the passivation film is difficult to propagate in the grains, and the corrosion resistance is significantly improved. Lv et al 56 reported that grain refinement can promote the diffusion of Cr elements on the material surface, which would also contribute to the formation of passivation film.…”

Section: Electrochemical Corrosion Mechanismmentioning

confidence: 99%

Iso-material manufacturing of 304 stainless steel: Microstructure, corrosion-cavitation erosion synergistic behaviour

Cao,

Wu,

Wang

et al. 2024

Materials Science and Technology

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Different from additive or subtractive manufacturing, iso-material manufacturing (also named isovolumetric manufacturing) was proposed in this work by laser surface melting (LSM), aiming at enhancing resistance to corrosion and cavitation erosion (CE) of 304 stainless steel. Experimental results showed that partial austenite transformed into martensite after LSM. The corrosion resistance of LSMed sample was improved. LSMed sample exhibited enhanced CE resistance, and was 2.5 and 2 times that of untreated sample in deionised water and 3.5 wt% NaCl solution, respectively. The passivation film for LSMed sample exhibited a high re-passive and self-repairing ability of passivation film. LSMed sample in this study exhibits a high or comparable corrosion and CE resistance in comparison with samples prepared by other fabrication method reported previously.

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Effect of grain refinement and electrochemical nitridation on corrosion resistance of the 316L stainless steel for bipolar plates in PEMFCs environment

Cited by 29 publications

References 25 publications

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Investigation on the Relationship between the Surface Chemistry and the Corrosion Resistance of Electrochemically Nitrided AISI 304 Stainless Steel

Pitting Corrosion in 316L Stainless Steel Fabricated by Laser Powder Bed Fusion Additive Manufacturing: A Review and Perspective

Iso-material manufacturing of 304 stainless steel: Microstructure, corrosion-cavitation erosion synergistic behaviour

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