Corrosion resistance of AISI 316L plasma nitrided at different temperatures and times

Olzon-Dionysio, M.; Olzon-Dionysio, D.; Campos, Marcelo; Shigeyosi, Willian Takemitsu; Souza, Solange de

doi:10.1007/s10751-019-1563-1

Cited by 13 publications

(24 citation statements)

References 27 publications

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“…The maximum corrosion potential is observed for P6, ~ -0.12 V, which is similar to that of the sample nitrided at the same conditions 13 .…”

Section: Corrosionsupporting

confidence: 74%

“…It is interesting to compare in Fig 8, the P6 curve with the curve of the previous thinner nitrided layer (thicker sample in the Table3, penultimate column), which was nitrided in the same conditions 13 . It can be said that the corrosion resistance is still better for the thicker sample.…”

Section: Corrosionmentioning

confidence: 99%

“…In order to compare this sample set with the previous 18 from our systematic study, these XRD data were analyzed assuming the same special triclinic symmetry 8,13 for this phase, which presents a slight angular distortion (η) from the FCC austenitic substrate structure and calculating the values for nitrogen content (C N ) through the Picard's equation 19 :…”

Section: X-ray Diffractionmentioning

confidence: 99%

“…Therefore, from the viewpoint of corrosion resistance, this finding suggests that the thicker sample is more interesting for plasma nitriding. As the nitride formation on the top plays an important role in the corrosion resistance 13 , it seems that the thinner nitrided layer of the thicker sample exhibits more nitrides on the top. Indeed, it was confirmed in the Mössbauer spectra, which showed ~ 86 % for magnetic contribution, which is mainly due to the nitrides 13…”

Section: Corrosionmentioning

confidence: 99%

“…Our main objective is to find the best combination of the plasma nitriding parameters to optimize the properties of the nitrided layer. Our previous studies, using 80 % H 2 -20 % N 2 gas, investigated the influence of temperature and time, indicating the best combination: 4h, 400 ºC [13][14][15] . This research has shown that nitrided layer properties depend much more on pressure than on temperature or time.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Gas Pressure of Plasma Nitriding on the Structural, Mechanical and Tribological Surface Properties of AISI 316L

et al. 2019

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In this paper, the influence of gas nitriding (80% H 2-20% N 2) pressure (between 3 and 7 Torr) on the modification of surface properties of AISI 316L stainless steel is examined. The structural, mechanical, tribological and electrochemical properties of the layer produced in disk samples were studied. The samples' characteristics were determined by scanning electron microscopy, X-ray diffraction, electrochemical potential curves, microhardness, roughness and wear tests. When pressure increases, the microhardness, elasticity and thickness also increase. The maximum thickness of the nitrided layer was 6.4 µm, the hardness reached 2200 HV 0.0036 and the mass loss decreased until 1% relatively to the unnitrided sample. The X-ray diffractograms showed the presence of the expanded austenite in all the samples. The correlation between these diffractograms and the corrosion results corroborate to the most recent previous conclusions of our systematic study, which evince the interconnection between the improvement of the corrosion resistance and the presence of nitrides on the top of the nitrided layer. More significant presence of such nitrides was observed for the sample nitrided at 6 Torr, whose corrosion performance was better than for the other samples. This pressure seems to be the most indicated to improve the properties under study. Moreover, the results verified not only that the sample geometry is an important factor for enhancing these properties but also that the border effect, which causes the rings on the disk border, depends on the pressure, but not on temperature or time from the plasma nitriding process.

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“…The maximum corrosion potential is observed for P6, ~ -0.12 V, which is similar to that of the sample nitrided at the same conditions 13 .…”

Section: Corrosionsupporting

confidence: 74%

Section: Corrosionmentioning

confidence: 99%

Section: X-ray Diffractionmentioning

confidence: 99%

Section: Corrosionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of the Gas Pressure of Plasma Nitriding on the Structural, Mechanical and Tribological Surface Properties of AISI 316L

et al. 2019

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Influence of Inclusions in the Corrosion Behavior of Plasma Nitrided Stainless Steel

Escalada

Dalibón²,

Brühl³

et al. 2023

Adv Eng Mater

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Plasma nitriding is a well‐established technique to improve hardness and tribological properties of austenitic stainless steel. It is proved that it is also possible to preserve the corrosion resistance after nitriding by controlling the process parameters such as time and temperature, obtaining the so‐called S phase. Herein, the corrosion behavior is evaluated for nitrided layers produced by three different plasma treatments: DC plasma nitriding, plasma immersion ion implantation (PIII), and low‐energy ion implantation (LEII), using different parameters in order to obtain the S‐phase in thickness from 1.2 to about 6 μm without nitride precipitation. The microstructure and chemical composition of the nitrided layers is characterized by means of X‐ray diffraction, secondary‐ion mass spectroscopy, and scanning electron microscopy–focused ion beam. The corrosion behavior is evaluated by means of the cyclic polarization tests in NaCl solution. The morphology of the corrosion attack is studied by optical microscopy and SEM‐FIB, revealing a change from crevice to pitting after the nitriding process. The inclusions are observed to be corrosion initiation sites. Due to this, the thickest nitrided layers (with high N concentration) show better corrosion behavior than the thinner ones.

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Investigation of Alloy‐Dependent Occurrence of Ferromagnetism in Carbon‐Expanded Austenitic Steel after Low‐Temperature Surface Hardening

Schuler

Krupp

Gümpel

et al. 2021

steel research int.

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Corrosion resistance of AISI 316L plasma nitrided at different temperatures and times

Cited by 13 publications

References 27 publications

Influence of the Gas Pressure of Plasma Nitriding on the Structural, Mechanical and Tribological Surface Properties of AISI 316L

Influence of the Gas Pressure of Plasma Nitriding on the Structural, Mechanical and Tribological Surface Properties of AISI 316L

Influence of Inclusions in the Corrosion Behavior of Plasma Nitrided Stainless Steel

Investigation of Alloy‐Dependent Occurrence of Ferromagnetism in Carbon‐Expanded Austenitic Steel after Low‐Temperature Surface Hardening

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