Possible origin of superior corrosion resistance for electrodeposited nanocrystalline Ni

Roy, Indranil; Yang, Heather; Dinh, Lauren; Lund, I.; Earthman, James C.; Mohamed, Farghalli A.

doi:10.1016/j.scriptamat.2008.03.033

Cited by 39 publications

(21 citation statements)

References 19 publications

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“…A tendency for localized corrosion was observed to be lower for electrodeposited (ED) nanocrystalline Ni [222]. The origin of better corrosion resistance for nanocrystalline metals was a subject of discussion and was attributed to increased breakdown potential and a better resistance to anodic dissolution as a result of lower porosity.…”

Section: Corrosion Resistancementioning

confidence: 99%

“…The discovery of grain boundaries in ED nanocrystalline Ni to be predominantly coherent low-sigma coincidence site lattices (Σ3 CSLs) has been attributed to the possible origin of its superior corrosion resistance. Recently, it has been demonstrated [222] that grain refinement, independent of the processing route, leads to the formation of high-angle boundaries and provides corrosion resistance to down-hole alloys. This breakthrough and recent advances in processing technology to engineer high-strength corrosion-resistant metallic nanomaterials will enable the design of nanostructured metallic materials specifically for the oil and gas industry.…”

Section: Corrosion Resistancementioning

confidence: 99%

See 1 more Smart Citation

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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Section: Corrosion Resistancementioning

confidence: 99%

Section: Corrosion Resistancementioning

confidence: 99%

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Sabirov

Enikeev

Murashkin

et al. 2015

Bulk Nanostructured Materials With Multifunctional Properties

View full text Add to dashboard Cite

show abstract

“…Recent work [34] has attempted to explain the high corrosion resistance of NC nickel obtained by electrodeposition compared with CG under salt spray conditions (5 % wt. NaCl + less than 200 ppm total solids at pH 7).…”

Section: Nickel and Its Alloysmentioning

confidence: 99%

“…Disolución: 3 % en peso NaCl [34] . Another interesting type of alloy that exhibits high hardness, good heat resistance and better corrosion behaviour, with respect to elemental nickel, includes Ni-W and Ni-Fe-W.…”

Section: Figura 4 Curvas Potencial Frente a Tiempo A Circuito Abiertmentioning

confidence: 99%

The corrosion behaviour of nanograined metals and alloys

Herrasti¹,

León²,

Walsh³

2012

REVMETAL

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“…Misorientation angles at boundaries between grains were determined using well-documented procedures. [21][22][23] The specimens were prepared metallographically and polished mechanically down to 0.1 lm in alumina slurry, followed by electro jet polishing. The polishing solution used was of the composition 10 pct HNO 3 and 90 pct methanol.…”

Section: Electron Backscatter Diffraction (Ebsd)mentioning

confidence: 99%

Quantitative Measurements of Grain Boundary Sliding in an Ultrafine-Grained Al Alloy by Atomic Force Microscopy

Han

Mohamed

2011

Metall Mater Trans A

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In the current study, quantitative measurements for grain boundary sliding (GBS) in ultrafinegrained (UFG) 5083 Al by atomic force microscopy (AFM) were performed. An ion beam polishing and etching technique was used to reveal grain boundaries in the alloy for AFM characterization. A comparison between the average grain sizes measured from AFM images and those estimated from transmission electron microscopy micrographs and electron backscatter diffraction (EBSD) maps showed excellent agreement. The vertical offset of GBS was measured by comparing predeformation and postdeformation AFM images. By analyzing these measurements, the contribution of GBS to the total tensile strain in 5083 Al was estimated as 25 pct at a strain rate of 10 À4 seconds À1 and a temperature of 473 K (200°C). It was demonstrated that the relatively low value of the contribution of GBS to the total strain is most likely the result of testing UFG 5083 Al under experimental conditions that favor the dominance of region I (low-stress region) of the sigmoidal behavior characterizing high-strain-rate superplasticity, which was reported previously for the alloy.

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Possible origin of superior corrosion resistance for electrodeposited nanocrystalline Ni

Cited by 39 publications

References 19 publications

Multifunctional Properties of Bulk Nanostructured Metallic Materials

Multifunctional Properties of Bulk Nanostructured Metallic Materials

The corrosion behaviour of nanograined metals and alloys

Quantitative Measurements of Grain Boundary Sliding in an Ultrafine-Grained Al Alloy by Atomic Force Microscopy

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