Comparison of corrosion properties of passive films formed on phase reversion induced nano/ultrafine-grained 321 stainless steel

Jinlong, Lv; Luo, Hongyun

doi:10.1016/j.apsusc.2013.04.108

Cited by 78 publications

(20 citation statements)

References 49 publications

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“…This can be explained based on the noticeable grain refinement that occurred in the FSW150 specimen. According to the literature [45,46], grain size plays a major role in the development of passive films on the surface of stainless steels. Hamada et al [45] observed that the finer grain structure of AISI 301LN austenitic stainless steel obtained by cold rolling process exhibited superior pitting corrosion resistance when compared to the coarse-grained one in the acidic chloride solution.…”

Section: Pitting Corrosion Susceptibilitymentioning

confidence: 99%

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Atapour

Sarlak

Esmailzadeh

2015

Int J Adv Manuf Technol

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The effect of friction stir welding (FSW) on the pitting corrosion resistance of a lean duplex stainless steel was investigated in chloride-containing and chloride-free electrolytes. FSW was carried out by employing a constant rotation speed of 800 rpm at the welding speeds of 50, 100, and 150 mm/min using WC-based tool. Cyclic polarization results showed the same corrosion resistance of the base metal and welded joints in 0.1 M H 2 SO 4 . The optical microscopy observations after cyclic polarization tests revealed that no signs of pitting corrosion were evident for the base metal and different FS welds in chloride-free 0.1 M H2SO4 solution. In contrast, a wide positive hysteresis loop indicative of pitting corrosion susceptibility was displayed for the base metal and FS welds in 0.1 M H 2 SO 4 +0.1 M NaCl solution. The optical micrographs of pitting corrosion in the base metal and various FS welds demonstrated that the size of pits was decreased and the number of pits was increased after FSW. It was also found that increasing the welding speed led to an increase in the number of pits and a decrease in the size of pits. In other words, the resistance to pit growth was improved by decreasing the heat input during FSW. These results were interpreted with respect to the noticeable grain refinement that occurred during FSW.

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Section: Pitting Corrosion Susceptibilitymentioning

confidence: 99%

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Atapour

Sarlak

Esmailzadeh

2015

Int J Adv Manuf Technol

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“…Some scientific research on evaluating the corrosion behavior of the nanostructured materials in comparison with the microstructure materials report that the nanostructured materials substantially improve the electrochemical behavior . This significant change in the corrosion behavior of the nanostructured stainless steel is mainly due to the change in the passive film structure .…”

Section: Resultsmentioning

confidence: 99%

Corrosion and biological behavior of nanostructured 316L stainless steel processed by severe plastic deformation

Hajizadeh

Maleki-Ghaleh

Arabi

et al. 2015

Surf. Interface Anal.

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Nanostructured metals have different mechanical, chemical, and physical behaviors in comparison with the microstructured ones. Numerous research studies demonstrated that the biological behavior of nanostructured metallic implants was improved significantly. Concerning the nanostructured metals, decreasing the corrosion rate and the releasing of hazardous ions from metallic implants, and thus increasing the biocompatibility of implants are due to improving the native oxide layer. In the present study, nanostructured 316L stainless steel (biomedical grade) was manufactured via equal channel angular pressing (ECAP) method. To do so, the 316L stainless steel (SS) was exposed to the ECAP operation for eight passes. The impact of the ECAP process on corrosion behavior of SS samples was evaluated through performing the electrochemical polarization corrosion tests in Ringer's solution. Scanning electron microscopy was employed to study the surface morphology of common SS and ECAPed SS sample after the electrochemical polarization tests. Moreover, the biological behavior of the samples was evaluated via cell culture using fibroblast cells. The corrosion test results revealed a substantial decrease of corrosion rate from 3.12 (coarse‐grained sample) to 0.42 μA cm−2 (for nanostructured). Furthermore, the cell proliferation in the interface of nanostructured sample and cell culture medium enhanced dramatically compared with the coarse‐grained one. The much better biological behavior of nanostructured SS sample in comparison with the coarse‐grained one is mostly due to the significant decrease of corrosion rate on the surface of SS samples, and the presence of much more chrome oxide on the surface of SS sample. Copyright © 2015 John Wiley & Sons, Ltd.

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“…On the other hand, authors of [229] demonstrated that UFG samples of 321 (08Cr18Ni10) austenitic stainless steel exhibit less corrosion resistance than their coarse-grained counterparts in NaCl environment and higher stability in H 2 SO 4 at room temperature, whereas in [230], an enhanced corrosion rate of UFG ferritic steel produced by SPD was observed in H 2 SO 4 solution. Besides, the data published in [231] testify that SPD processing of interstitial-free steel does not lead to considerable change in corrosion properties in NaCl.…”

Section: Corrosion Resistancementioning

confidence: 93%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

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This chapter focuses on multifunctional properties of bulk nanostructured metallic materials and structure-properties relationship therein. The most important structural factors affecting mechanical, physical, and chemical properties of the nanomaterials are discussed, and the strategies to their further improvement are outlined. Special attention is paid to nanostructural design for simultaneous improvement of mutually exclusive properties. Superstrength and Enhanced Mechanical PropertiesAlthough the mechanical and functional properties of all polycrystalline metallic materials are determined by several factors, the grain size of the material generally plays the most significant and often a dominant role. Thus, the strength of different polycrystalline materials is related to the grain size, d, through the Hall-Petch equation which states that the yield stress, σ y , is given bywhere σ o is termed the friction stress and k y the Hall-Petch constant [1,2]. It follows from Eq. 3.1 that the strength increases with a reduction in the grain size and this has led to an ever-increasing interest in fabricating materials with extremely small grain sizes. The fabrication of bulk samples and billets using equal channel angular pressing (ECAP), high pressure torsion (HPT), and other severe plastic deformation (SPD) techniques was a crucial first step in initiating investigations into the properties of bulk nanomaterials because the use of SPD processing permitted, and subsequently fully supported, a series of systematic studies using various nanostructured metallic materials including commercial alloys [3][4][5][6][7][8]

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Comparison of corrosion properties of passive films formed on phase reversion induced nano/ultrafine-grained 321 stainless steel

Cited by 78 publications

References 49 publications

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Pitting corrosion susceptibility of friction stir welded lean duplex stainless steel joints

Corrosion and biological behavior of nanostructured 316L stainless steel processed by severe plastic deformation

Multifunctional Properties of Bulk Nanostructured Metallic Materials

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