XPS characterization of surface layers of stainless steel nitrided in electron beam plasma at low temperature

Kukharenko, Andrey I.; Makarov, A. V.; Savrai, R. A.; Гаврилов, Н. М.; Cholakh, S. O.; Kurmaev, E.Z.

doi:10.1016/j.surfcoat.2020.125492

Cited by 15 publications

(4 citation statements)

References 25 publications

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“…The nature of this expanded phase is still an open question. Many studies carried out with different analytical techniques suggested that a preferential bonding of N with Cr atoms occurred [110][111][112] and that Cr-N short-range order (SRO) regions were present together with regions having a γ -Fe 4 N-like long-range order (LRO) region, indicated as γ N [113][114][115][116]. Further details on the structure of the expanded austenite are reported in [22,24,33].…”

Section: Microstructure and Characteristics Of The Modified Surface L...mentioning

confidence: 99%

The Corrosion Behavior in Different Environments of Austenitic Stainless Steels Subjected to Thermochemical Surface Treatments at Low Temperatures: An Overview

Borgioli

2023

Metals

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Low-temperature thermochemical treatments are particularly suitable for use in the surface hardening of austenitic stainless steels without impairing their corrosion resistance. In fact, when using treatment media rich in nitrogen and/or carbon at relatively low temperatures (<450 °C for nitriding, <550 °C for carburizing), it is possible to inhibit the formation of chromium compounds and obtain modified surface layers that consist mainly of a supersaturated solid solution, known as expanded austenite or S-phase. It has been observed that this hard phase allows the enhancement of corrosion resistance in chloride-ion-containing solutions, while the results were contradictory for chloride-free acidic solutions. This overview aims to discuss the corrosion behavior of low-temperature-treated austenitic stainless steels, taking into account the different microstructures and phase compositions of the modified layers, as well as the different test environments and conditions. In particular, the corrosion behavior in both chloride-ion-containing solutions and chloride-free solutions (sulfuric acid, sulfate and borate solutions) is discussed. The analysis of the international literature presents evidence that the microstructure and phase composition of the modified layers have key roles in corrosion resistance, especially in sulfuric acid solutions.

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Section: Microstructure and Characteristics Of The Modified Surface L...mentioning

confidence: 99%

The Corrosion Behavior in Different Environments of Austenitic Stainless Steels Subjected to Thermochemical Surface Treatments at Low Temperatures: An Overview

Borgioli

2023

Metals

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“…In XPS spectra for Cr 2p, four chemical compounds were found: Cr 2 O 3 , Cr 7 C 3 , CrO 3 and Cr(C 6 H 6 ) 2, as shown in Figures 5a, 6a, 7a, 8a, 9a, 10a and 11a. According to the literature [88][89][90], the Cr 2 O 3 presence corresponding to the passive layer composition can be found from 576 to 578 eV; the obtained binding energy peaks ranged from 576.69 to 577.07 eV, according to the values reported for the chromium oxide layers. Finally, Figures 5a', 6a', 7a', 8a', 9a', 10a' and 11a' summarize the parameters obtained from full width at half maximum (FWHM) fitting, area ratio, and the peak binding energy, respectively.…”

Section: Xps Analysismentioning

confidence: 72%

Corrosion Behavior of Passivated Martensitic and Semi-Austenitic Precipitation Hardening Stainless Steel

Almeraya-Calderón

Samaniego-Gámez

Maldonado-Bandala

et al. 2022

Metals

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This research aimed to conduct a passive layer state study on martensitic and semi-austenitic precipitation hardening stainless steels (PHSS) passivated in citric acid and nitric acid baths at 49 and 70 °C for 50 and 75 min and subsequently exposed in 5 wt.% NaCl and 1 wt.% H2SO4 solutions. Corrosion behavior of the passivated material was observed by using potentiodynamic polarization (PP) according to the ASTM G5-11 standard. The microstructural analysis was performed by optical microscopy and scanning electron microscopy (SEM), while the passivated layer was characterized by X-ray photoelectron spectroscopy (XPS). The results indicated that the semi-austenitic-NA-50 min-70 °C sample showed the best corrosion resistance behavior in both solutions. The XPS characterization confirmed that the martensitic and semi-austenitic surface film presented a mixture of chemical compounds, such as Cr2O3 and Fe(OH)O, respectively.

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“…Nickel is a versatile metal that is used in several products, from simple day-by-day coinage [246] to electrodes used for Escherichia coli detection in water [247]. It is one of the metals contained in stainless steel [248], a stable alloy used to construct several industrial products. It is also applied as a powerful catalyst in polymerization [249,250], C-C coupling [251], oxygen [252] or hydrogen evolution [253], or even cycloaddition reactions [254].…”

Section: Nickel-catalyzed C-h Activationmentioning

confidence: 99%

On the application of 3d metals for C–H activation toward bioactive compounds: The key step for the synthesis of silver bullets

Carvalho¹,

Miranda²,

Nunes³

et al. 2021

Beilstein J. Org. Chem.

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Several valuable biologically active molecules can be obtained through C–H activation processes. However, the use of expensive and not readily accessible catalysts complicates the process of pharmacological application of these compounds. A plausible way to overcome this issue is developing and using cheaper, more accessible, and equally effective catalysts. First-row transition (3d) metals have shown to be important catalysts in this matter. This review summarizes the use of 3d metal catalysts in C–H activation processes to obtain potentially (or proved) biologically active compounds.

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XPS characterization of surface layers of stainless steel nitrided in electron beam plasma at low temperature

Cited by 15 publications

References 25 publications

The Corrosion Behavior in Different Environments of Austenitic Stainless Steels Subjected to Thermochemical Surface Treatments at Low Temperatures: An Overview

The Corrosion Behavior in Different Environments of Austenitic Stainless Steels Subjected to Thermochemical Surface Treatments at Low Temperatures: An Overview

Corrosion Behavior of Passivated Martensitic and Semi-Austenitic Precipitation Hardening Stainless Steel

On the application of 3d metals for C–H activation toward bioactive compounds: The key step for the synthesis of silver bullets

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