Effect of ultrafine-grained structure and chromium addition on corrosion resistance of Ni-Cr-Al alloys

Daljeet Singh; Hitesh Kumar Mehtani; Srinivasulu Grandhi; Smrutiranjan Parida; Rajiv Kumar

doi:10.1016/j.matchar.2024.113774

Effect of ultrafine-grained structure and chromium addition on corrosion resistance of Ni-Cr-Al alloys

Daljeet Singh, Hitesh Kumar Mehtani, Srinivasulu Grandhi, Smrutiranjan Parida, Rajiv Kumar^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The present work aims to understand the various scientific aspects related to the corrosion behavior of the ultrafine-grained (UFG) and coarse-grained (CG) Ni-(10,20)Cr-10Al (wt%) alloys in 3.5 wt% NaCl solution based on the passive layer formation on the alloys. In this regard, UFG and CG Ni-(10, 20)Cr-10Al (wt%) alloys were synthesized and characterized. Results of corrosion studies reveal that the UFG structure of the alloys is favorable to enhance the corrosion performance due to their high grain boundary density, which provides nucleation sites for rapid and effective passivation of the alloys by the formation of external Cr₂O₃ layer instead of mixed oxides/hydroxides. Besides, the Cr addition to the alloys also fosters the Cr-containing passive layer formation. The superior corrosion behavior of the UFG alloys is supported by scanning electron microscopy, electrochemical impedance spectroscopy, and Raman spectroscopy.

Original language	English
Article number	113774
Journal	Materials Characterization
Volume	209
DOIs	https://doi.org/10.1016/j.matchar.2024.113774
State	Published - Mar 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Inc.

Keywords

Electrochemical corrosion
Electrochemical impedance spectroscopy
Ni-Cr-Al alloys
Ultrafine-grained alloys
X-ray diffraction

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matchar.2024.113774

Cite this

@article{11e535f2422f47019db66cd16a8dee44,

title = "Effect of ultrafine-grained structure and chromium addition on corrosion resistance of Ni-Cr-Al alloys",

abstract = "The present work aims to understand the various scientific aspects related to the corrosion behavior of the ultrafine-grained (UFG) and coarse-grained (CG) Ni-(10,20)Cr-10Al (wt\%) alloys in 3.5 wt\% NaCl solution based on the passive layer formation on the alloys. In this regard, UFG and CG Ni-(10, 20)Cr-10Al (wt\%) alloys were synthesized and characterized. Results of corrosion studies reveal that the UFG structure of the alloys is favorable to enhance the corrosion performance due to their high grain boundary density, which provides nucleation sites for rapid and effective passivation of the alloys by the formation of external Cr2O3 layer instead of mixed oxides/hydroxides. Besides, the Cr addition to the alloys also fosters the Cr-containing passive layer formation. The superior corrosion behavior of the UFG alloys is supported by scanning electron microscopy, electrochemical impedance spectroscopy, and Raman spectroscopy.",

keywords = "Electrochemical corrosion, Electrochemical impedance spectroscopy, Ni-Cr-Al alloys, Ultrafine-grained alloys, X-ray diffraction",

author = "Daljeet Singh and Mehtani, \{Hitesh Kumar\} and Srinivasulu Grandhi and Smrutiranjan Parida and Rajiv Kumar",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Inc.",

year = "2024",

month = mar,

doi = "10.1016/j.matchar.2024.113774",

language = "English",

volume = "209",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Effect of ultrafine-grained structure and chromium addition on corrosion resistance of Ni-Cr-Al alloys

AU - Singh, Daljeet

AU - Mehtani, Hitesh Kumar

AU - Grandhi, Srinivasulu

AU - Parida, Smrutiranjan

AU - Kumar, Rajiv

PY - 2024/3

Y1 - 2024/3

N2 - The present work aims to understand the various scientific aspects related to the corrosion behavior of the ultrafine-grained (UFG) and coarse-grained (CG) Ni-(10,20)Cr-10Al (wt%) alloys in 3.5 wt% NaCl solution based on the passive layer formation on the alloys. In this regard, UFG and CG Ni-(10, 20)Cr-10Al (wt%) alloys were synthesized and characterized. Results of corrosion studies reveal that the UFG structure of the alloys is favorable to enhance the corrosion performance due to their high grain boundary density, which provides nucleation sites for rapid and effective passivation of the alloys by the formation of external Cr2O3 layer instead of mixed oxides/hydroxides. Besides, the Cr addition to the alloys also fosters the Cr-containing passive layer formation. The superior corrosion behavior of the UFG alloys is supported by scanning electron microscopy, electrochemical impedance spectroscopy, and Raman spectroscopy.

AB - The present work aims to understand the various scientific aspects related to the corrosion behavior of the ultrafine-grained (UFG) and coarse-grained (CG) Ni-(10,20)Cr-10Al (wt%) alloys in 3.5 wt% NaCl solution based on the passive layer formation on the alloys. In this regard, UFG and CG Ni-(10, 20)Cr-10Al (wt%) alloys were synthesized and characterized. Results of corrosion studies reveal that the UFG structure of the alloys is favorable to enhance the corrosion performance due to their high grain boundary density, which provides nucleation sites for rapid and effective passivation of the alloys by the formation of external Cr2O3 layer instead of mixed oxides/hydroxides. Besides, the Cr addition to the alloys also fosters the Cr-containing passive layer formation. The superior corrosion behavior of the UFG alloys is supported by scanning electron microscopy, electrochemical impedance spectroscopy, and Raman spectroscopy.

KW - Electrochemical corrosion

KW - Electrochemical impedance spectroscopy

KW - Ni-Cr-Al alloys

KW - Ultrafine-grained alloys

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/85185554738

U2 - 10.1016/j.matchar.2024.113774

DO - 10.1016/j.matchar.2024.113774

M3 - Article

AN - SCOPUS:85185554738

SN - 1044-5803

VL - 209

JO - Materials Characterization

JF - Materials Characterization

M1 - 113774

ER -

Effect of ultrafine-grained structure and chromium addition on corrosion resistance of Ni-Cr-Al alloys

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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