Intergranular corrosion behavior of low-chromium ferritic stainless steel without Cr-carbide precipitation after aging

Zhou, Tianjun; Mao, Yaozong; Liu, Xianbin; Han, En‐Hou; Hänninen, Hannu

doi:10.1016/j.corsci.2019.108420

Cited by 39 publications

(10 citation statements)

References 65 publications

(134 reference statements)

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“…3) The final mechanism is the cosegregation of Cr—C, as shown in Figure 6c. Hu et al [ 18 ] investigated the intergranular corrosion of low‐Cr ferritic stainless steel without Cr‐carbide precipitation after aging. Their novel assumption is proposed based on the characterization of GBs via scanning electron microscope and scanning Kelvin probe force microscopy.…”

Section: The Functional Role Of the Alloying Elementsmentioning

confidence: 99%

“…Nonmetallic alloying elements such as B, C, and N have small atomic radii, and they show different enhancement mechanisms from metallic alloying elements. [18][19][20][21] Their beneficial influence can be achieved by releasing oxyanions (as inhibitor) and/or stabilizing the electronic structure of Fe, whereas most of the metallic elements reduce anodic dissolution by participating in the formation of a passive film and/or stabilizing the passive film. Although many scholars have conducted in-depth studies, there is lack of consistent conclusions regarding the effects of elements on corrosion resistance of metals.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Alloying Elements and Microstructure on Stainless Steel Corrosion: A Review

Sun

Tang

Wang

et al. 2021

steel research int.

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Stainless steel has attracted significant attention in industrial and engineering applications. To improve its corrosion resistance, there are two major approaches that are to optimize the elemental composition and tune the microstructure. A comprehensive review of the main findings on the corrosion of stainless steel is presented, and some controversial issues are highlighted. First, the functional roles of alloying elements are discussed, including nonmetallic (B, C, and N) and metallic (Cr, Ni, Cu, and Mo) elements. Additionally, their detrimental and positive effects, as well as the corresponding mechanisms, are highlighted. Second, the microstructure‐induced corrosion of stainless steel is discussed, including the crystallographic‐orientation‐dependent corrosion, the dual influence of grain size and grain boundary distribution, texture, and defects in the matrix. In addition, nanostructured materials are mentioned herein. Third, challenges as well as research trends in the future are proposed with perspectives for the development of novel stainless steel in research and industrial applications.

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Section: The Functional Role Of the Alloying Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Alloying Elements and Microstructure on Stainless Steel Corrosion: A Review

Sun

Tang

Wang

et al. 2021

steel research int.

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“…Intergranular corrosion is the selective corrosion of stainless steel in sensitive areas, usually due to inappropriate heat treatment, welded joints, etc., Carbides are usually precipit-ated at the prior austenite grain boundary or the martensite lath, which results in preferential corrosion and has a high sensitivity to intergranular corrosion, so that it always results in fractures along grain boundaries of prior austenite or martensite lath [33][34].…”

Section: Intergranular Corrosionmentioning

confidence: 99%

Effect of microstructure on corrosion behavior of high strength martensite steel—A literature review

Wang

Dong

Cheng

et al. 2021

Int J Miner Metall Mater

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The high strength martensite steels are widely used in aerospace, ocean engineering, etc., due to their high strength, good ductility and acceptable corrosion resistance. This paper provides a review for the influence of microstructure on corrosion behavior of high strength martensite steels. Pitting is the most common corrosion type of high strength stainless steels, which always occurs at weak area of passive film such as inclusions, carbide/intermetallic interfaces. Meanwhile, the chromium carbide precipitations in the martensitic lath/prior austenite boundaries always result in intergranular corrosion. The precipitation, dislocation and grain/lath boundary are also used as crack nucleation and hydrogen traps, leading to hydrogen embrittlement and stress corrosion cracking for high strength martensite steels. Yet, the retained/reversed austenite has beneficial effects on the corrosion resistance and could reduce the sensitivity of stress corrosion cracking for high strength martensite steels. Finally, the corrosion mechanisms of additive manufacturing high strength steels and the ideas for designing new high strength martensite steel are explored.

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“…δ-ferrite traps more chromium than austenite, resulting in insufficient chromium content adjacent to the grain boundaries of the former [37,38]. Moreover, previous works have shown [37,39,40] that chromium carbides (Cr 23 C 6 ) start to precipitate along the δ-ferrite/austenite interfaces at a temperature of 400~800 • C. These phenomena cause chromium-depleted regions to form near grain boundaries, making welded SS susceptible to corrosion. Figure 2a,b are SEM images of a SS weld surface, showing a dendritic structure with dark δ-ferrite encased in a bright austenite matrix and chromium carbide that has precipitated along the δ-ferrite/austenite interfaces, respectively.…”

Section: Anodized Ss Weldmentioning

confidence: 99%

Improvement of Corrosion Resistance of Stainless Steel Welded Joint Using a Nanostructured Oxide Layer

Heo

Lee

et al. 2021

Nanomaterials

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In this study, we fabricated a nanoporous oxide layer by anodization to improve corrosion resistance of type 304 stainless steel (SS) gas tungsten arc weld (GTAW). Subsequent heat treatment was performed to eliminate any existing fluorine in the nanoporous oxide layer. Uniform structures and compositions were analyzed with field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD) measurements. The corrosion resistance of the treated SS was evaluated by applying a potentiodynamic polarization (PDP) technique and electrochemical impedance spectroscopy (EIS). Surface morphologies of welded SS with and without treatment were examined to compare their corrosion behaviors. All results indicate that corrosion resistance was enhanced, making the treatment process highly promising.

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Intergranular corrosion behavior of low-chromium ferritic stainless steel without Cr-carbide precipitation after aging

Cited by 39 publications

References 65 publications

Effects of Alloying Elements and Microstructure on Stainless Steel Corrosion: A Review

Effects of Alloying Elements and Microstructure on Stainless Steel Corrosion: A Review

Effect of microstructure on corrosion behavior of high strength martensite steel—A literature review

Improvement of Corrosion Resistance of Stainless Steel Welded Joint Using a Nanostructured Oxide Layer

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