Corrosion characteristics of nanostructured layer on 316L stainless steel fabricated by cavitation-annealing

Kwok, Chi Tat; Cheng, F. T.; Man, Hau Chung; Ding, Weijian

doi:10.1016/j.matlet.2006.01.053

Cited by 73 publications

(29 citation statements)

References 15 publications

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“…The claimed role of diffusion in enhancing aqueous corrosion resistance of stainless steel at low temperatures, as suggested in literature [102,130] has received a strong criticism in a very recent report [124] on the basis of the very low diffusivities (i.e., 10 À40 to 10 À43 m 2 /s) at the test temperatures. A few studies [102,[130][131][132][133] have also compared the electrochemical corrosion of nanocrystalline and microcrystalline alloys with high Cr contents (>18 wt pct). Electrochemical corrosion resistance of a nanocrystalline surface of 316 stainless steel developed by surface mechanical attrition treatment (SMAT) was found to be considerably inferior to the microcrystalline unmodified bulk.…”

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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The extremely fine grain size of nanocrystalline (nc) metallic alloys results in significantly different mechanical, electrochemical and oxidation properties as compared to the coarse-grained alloys of the same composition. Although the synthesis and attractive mechanical properties of nanocrystalline materials have been investigated and reviewed in great depth, the high temperature oxidation and electrochemical corrosion of these materials has received limited attention. The difference in the active dissolution and passivation behavior of nc alloys as compared to their microcrystalline counterparts varies for each alloy system. However, a unified theory explaining these phenomena still eludes us. In this context, this article reviews the progress in the electrochemical corrosion behavior of different nanocrystalline alloys, and hence, develops a better understanding of the effect of grain size, composition, interfacial phenomena and selective dissolution on corrosion of nanocrystalline alloys. This review also presents the role of nanometric grain size and the associated increase in grain boundary diffusion on the high temperature oxidation of nc alloys. The attractive possibility of enhanced oxidation resistance at lower alloying additions as compared to the coarse-grained alloys has been discussed. Although the primary focus of the article is on ferrous alloy systems, however, the lead studies on the role of ultrafine grain size in oxidation/corrosion behavior of other alloys systems have also been reviewed.

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Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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“…Moreover, the nc surfaces used for the corrosion studies were in the form of the thin surface films. Therefore, it may not be inappropriate to suggest that the effects of nc structure on corrosion, as claimed in the studies discussed earlier [11][12][13][14][15][16], could also be dominated by factors other than the nc structure, such as the residual stress, solute segregation, phase composition, and other defects present in the nc alloys (that were produced by different processing routes).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical characteristics of nano and microcrystalline Fe–Cr alloys

2012

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The electrochemical behavior of nano and microcrystalline Fe-10Cr and Fe-20Cr alloys was determined using potentiodynamic polarization in 0.5 M H 2 SO 4 . Disks of the alloys were prepared by high-energy ball milling followed by compaction and sintering. In the current study, nanocrystalline Fe-Cr alloys reveal significantly different electrochemical characteristics, typified by lower anodic current densities and more negative passivation potentials, compared with their microcrystalline counterparts. In addition to the differences in grain boundary density, compositional characterization of corrosion films carried out by X-ray photoelectron spectroscopy indicates a higher Cr content in the film developed upon nanocrystalline Fe-Cr alloys. Mechanisms for observed enhancement in the corrosion performance of the nanocrystalline Fe-Cr alloys are discussed.

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“…Las potencialidades que resultan de esta relación han derivado en que muchas investigaciones se han dirigido a la tarea de afinar el grano en materiales metálicos, de una forma masiva, a través de técnicas que utilizan deformación plástica severa [1] , por vía electroquímica [2] o mediante transformaciones de fase por deformación [3 y 4] . Otras investigaciones se han abocado a afinar el grano superficialmente, deformando mediante arenado [5][6][7][8] , bombardeo con esferas [9 y 10] , pulsos de ultrasonido [11] , atrición [12] y más recientemente, mediante el uso de (•) Trabajo recibido el día 26 de septiembre de 2011 y aceptado en su forma final el día 25 de junio de 2012. * Departamento de Ingeniería de Materiales (DIMAT), Facultad de Ingeniería, Universidad de Concepción, C/ Edmundo Larenas 270, Casilla 160-C, Concepción, Chile.…”

Section: Introductionunclassified

Efecto de la modificación superficial de alambres delgados de acero inoxidable AISI 302 mediante plasma electrolítico sobre sus propiedades mecánicas

Gallegos¹,

Camurri²,

Carrasco³

et al. 2012

REVMETAL

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INTRODUCCIÓNEs sabido que la presencia de granos pequeños favorece la resistencia mecánica de los materiales metá-licos, fenómeno que se explica a partir de la clásica ecuación de Hall-Petch. Las potencialidades que resultan de esta relación han derivado en que muchas investigaciones se han dirigido a la tarea de afinar el grano en materiales metálicos, de una forma masiva, a través de técnicas que utilizan deformación plástica severa [1] , por vía electroquímica [2] o mediante transformaciones de fase por deformación [3 y 4] . Otras investigaciones se han abocado a afinar el grano superficialmente, deformando mediante arenado [5][6][7][8] , bombardeo con esferas [9 y 10] , pulsos de ultrasonido [11] , atrición [12] y más recientemente, mediante el uso de A. Gallegos*, C. Camurri*, C. Carrasco* y F. Soldera** ResumenEn este trabajo se realizaron ensayos de aplicación de plasma electrolítico (PE) sobre alambres delgados de acero inoxidable AISI 302 en una solución inerte. Las probetas se sometieron a ensayos de tracción, con el fin de medir cambios en su resistencia mecánica; adicionalmente fueron evaluadas en sus cambios morfológicos y microestructurales. Se encontró que después de 10 s de aplicación de PE, la superficie de las probetas estaba uniformemente cubierta por nódulos y cráteres propios del ciclo de fusión y enfriamiento del PE; se evidenció un significativo afinamiento del grano superficial, llegando a ordenamientos cristalinos de tamaño menor a 200 nm y también se observó que la capa superficial afectada presentó un incremento de la resistencia a la tracción de al menos un 57 % respecto al acero base. Palabras clavePlasma electrolítico; Electrólisis de alto voltaje; Nanoestructuración superficial; Nanogranos; Resistencia a la ruptura; Oxidación por plasma electrolítico. Effects of surface modification of thin wires of AISI 302 stainless steel by electrolytic plasma on its mechanical properties AbstractIn this work different tests using electrolytic plasma (EP) on thin wires of stainless steel AISI 302 in an inert solution were performed. Tensile tests were carried out in order to measure changes in the mechanical strength of the samples; moreover, both the morphological and microstructural changes also were evaluated. It was found that after 10 s of the application of EP, the samples surface was uniformly covered by nodules-like and craters similar to those found in the melting and cooling periods of EP. The results show a significant surface grain refinement, leading to crystalline arrangements with sizes less than 200 nm and also an increase in the samples tensile strength of at least 57 % respect to steel base.

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Corrosion characteristics of nanostructured layer on 316L stainless steel fabricated by cavitation-annealing

Cited by 73 publications

References 15 publications

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Electrochemical characteristics of nano and microcrystalline Fe–Cr alloys

Efecto de la modificación superficial de alambres delgados de acero inoxidable AISI 302 mediante plasma electrolítico sobre sus propiedades mecánicas

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