Near atomic-scale comparison of passive film on a 17 wt% Cr-added 18 wt% Mn steel with those on typical austenitic stainless steels

Kim, Eun Tae; Ishtiaq, Muhammad; Han, Jong Chan; Ko, Kwang Kyu; Bae, Hyo Ju; Sung, Hyokyung; Kim, Jung Gi; Seol, Jae Bok

doi:10.1016/j.scriptamat.2021.114112

Cited by 10 publications

(5 citation statements)

References 29 publications

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“…Based on the native film covering the austenitic stainless steel, we determined that the native film is mainly divided into two layers. The outer layer is an iron-nickel oxide layer, and the inner layer is a Cr-enriched layer [38][39][40]. On the basis of the results, the iron-nickel oxide outer layer dissolved once the sample was exposed to the sulfuric acid solution.…”

Section: Effect Of Pickling Treatment On Super 13cr Surface Chemical ...mentioning

confidence: 93%

The Influence of Pickling Treatment Parameters on the Surface State and Pre-Passivation Behavior of Super 13Cr Martensitic Stainless Steel

et al. 2022

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As a pre-treatment process in the pre-passivation of stainless steel, pickling treatment has a significant effect on the formation of the pre-passivation film. Thus, the surface composition and defects of Super 13Cr martensitic stainless steel (Super 13Cr) were evaluated under different pickling parameters to further improve the corrosion resistance of the pre-passivation film. The samples were prepared using the acid immersion method and by changing the immersion duration and the acid concentration. The inclusion and chemical composition on the Super 13Cr surface were characterized via a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS). The pickling treatment contributes little to the morphology, dimension, and other characteristic parameters of the inclusions. With the increasing duration and acidification concentration, the Cr content on the surface of Super 13Cr increases initially and then decreases. By contrast, the Fe content decreases initially and then increases. The pickling parameters corresponding to the lowest Fe content and the highest Cr content are identical, i.e., the exposure duration is 50 s and the acid concentration is 48 g/L. The pickling treatment in this case could be divided into two stages: outer film dissolution and inner film dissolution. The pickling parameters basically contribute little to the defects of martensitic stainless steel but can significantly affect the surface Cr and Fe content. Retaining the Cr-enriched inner layer could improve the content of Cr in the pre-passivation film and then improve the corrosion resistance of the film. Thus, compared with the original sample with native film, the corrosion resistance of the sample with a Cr-enriched inner layer improved by a factor of about 40.

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Section: Effect Of Pickling Treatment On Super 13cr Surface Chemical ...mentioning

confidence: 93%

The Influence of Pickling Treatment Parameters on the Surface State and Pre-Passivation Behavior of Super 13Cr Martensitic Stainless Steel

et al. 2022

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“…Enrichment of Ni within the altered zone at the metal/oxide interface and altered zone could be found. Kim et al 131 found that the lower corrosion resistance of austenitic stainless steels (Fe 64 Cr 18 Mn 18 ) compared to 304 and 316 stainless steels was due to their instability in the passive film structure. As shown in Fig.…”

Section: Native Oxidementioning

confidence: 99%

Recent research progress on the passivation and selective oxidation for the 3d-transition-metal and refractory multi-principal element alloys

Wang,

Yan,

et al. 2023

npj Mater Degrad

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The wide range of alloy composition controllability for multi-principal element alloys (MPEAs) may provide a great opportunity for discovering special forms of surface oxides to improve the corrosion and oxidation resistance in extreme environments. Changing the type and content of promoting passivation elements would not only change the microstructure of the alloy but also significantly affect the composition and structure of the surface passive film, resulting in a strong impact on the corrosion and oxidation resistance of the alloy. This article reviews recent research on the effects of alloying elements on the passivation properties, the contribution of each alloying element, and the synergistic effect between the elements on the passivation mechanisms and electrochemical dissolution characteristics of surface passive films that form on some MPEAs. In addition, the composition and structural characteristics of surface oxides relevant to the selective oxidation of elements are elaborated upon. Finally, several open questions and recommendations for research directions regarding the passivation and selective oxidation of MPEAs were provided to guide future exploration.

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“…Nowadays, the use of stainless steels, from daily necessities to chemical plants and sophisticated vehicles, is ubiquitous [ 2 ]. It is widely accepted that such extraordinary corrosion resistance comes from a native passive film on the alloy surface [ 3 , 4 , 5 , 6 ]. In particular, the formation of a continuous Cr 2 O 3 layer in the 3-nm-thick native film after the addition of excessive Cr (>10.8 wt.%) was found to ensure the long-term protection of the alloy [ 3 ], enabling it to withstand harsh conditions.…”

Section: Introductionmentioning

confidence: 99%

“…It is widely accepted that such extraordinary corrosion resistance comes from a native passive film on the alloy surface [ 3 , 4 , 5 , 6 ]. In particular, the formation of a continuous Cr 2 O 3 layer in the 3-nm-thick native film after the addition of excessive Cr (>10.8 wt.%) was found to ensure the long-term protection of the alloy [ 3 ], enabling it to withstand harsh conditions. However, the fundamental mechanism of this protection is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Corrosion Resistance of 316 L Stainless Steel by an In Situ Grown Nano Oxide Film

Ren

Shen

et al. 2023

Nanomaterials

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It is widely accepted that the corrosion resistance of stainless steel originates from a compact Cr2O3 layer in the native passive film that serves as a barrier to aggressive ions. However, this suggestion has been questioned by some researchers. They believe that protectiveness might be related to the film recovery. Herein, the pitting development of bare 316L stainless steel was compared with a corrosion-resistance enhanced steel obtained by tuning the native passive film of the alloy. Statistical software was employed for tracing the size and number of pits on the alloy surface. The statistical results for 12 weeks in 1 M sodium chloride solution (80 °C) revealed that there was a crossover in the growing rates of stable pits (diameter > 9 µm) between the bare alloy and the film-enhanced one. Stable pits on bare 316L occurred early but showed a comparatively slow increase in the following weeks, demonstrating that self-repairability of metastable pits rather than impermeability of the native passive film plays the key role in the early stage of pitting corrosion.

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Near atomic-scale comparison of passive film on a 17 wt% Cr-added 18 wt% Mn steel with those on typical austenitic stainless steels

Cited by 10 publications

References 29 publications

The Influence of Pickling Treatment Parameters on the Surface State and Pre-Passivation Behavior of Super 13Cr Martensitic Stainless Steel

The Influence of Pickling Treatment Parameters on the Surface State and Pre-Passivation Behavior of Super 13Cr Martensitic Stainless Steel

Recent research progress on the passivation and selective oxidation for the 3d-transition-metal and refractory multi-principal element alloys

Revealing the Corrosion Resistance of 316 L Stainless Steel by an In Situ Grown Nano Oxide Film

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