Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

Zhan Wen Wu; Ji Chen; Nan Piao; Cheng Sun; W. Hassan; Xin Hang Zhang; Yu Jun Xie

doi:10.1016/S1003-6326(14)63280-5

Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

Zhan Wen Wu
, Ji Chen
, Nan Piao
, Cheng Sun
, W. Hassan
, Xin Hang Zhang
, Yu Jun Xie

Materials and Fuels Complex

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

20 Scopus citations

Abstract

The corrosion behavior of bulk ultra-fine grained (UFG) Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na₂SO₄+0.05 mol/L H₂SO₄ solution by electrochemical measurements. As compared to the coarse grained (CG) counterpart, the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive current. The Mott-Schottky analysis in conjunction with the point defect model indicates that the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.

Original language	English
Pages (from-to)	1989-1994
Number of pages	6
Journal	Transactions of Nonferrous Metals Society of China (English Edition)
Volume	24
Issue number	6
DOIs	https://doi.org/10.1016/S1003-6326(14)63280-5
State	Published - Jun 2014

Keywords

Fe-Ni-Cr
acid corrosion
passivation
polarization
stainless steel

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10.1016/S1003-6326(14)63280-5

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title = "Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy",

abstract = "The corrosion behavior of bulk ultra-fine grained (UFG) Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na2SO4+0.05 mol/L H2SO4 solution by electrochemical measurements. As compared to the coarse grained (CG) counterpart, the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive current. The Mott-Schottky analysis in conjunction with the point defect model indicates that the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.",

keywords = "Fe-Ni-Cr, acid corrosion, passivation, polarization, stainless steel",

author = "Wu, \{Zhan Wen\} and Ji Chen and Nan Piao and Cheng Sun and W. Hassan and Zhang, \{Xin Hang\} and Xie, \{Yu Jun\}",

note = "Funding Information: Foundation item: Project (201202127) support by Liaoning Provincial Natural Science Foundation of China under Grant; Project (LJQ2011033) support by Program for Liaoning Excellent Talents in University Corresponding author: Ji CHEN; Tel: +86-13516005504; E-mail: jchen\[email protected] DOI: 10.1016/S1003-6326(14)63280-5",

year = "2014",

month = jun,

doi = "10.1016/S1003-6326(14)63280-5",

language = "English",

volume = "24",

pages = "1989--1994",

journal = "Transactions of Nonferrous Metals Society of China (English Edition)",

issn = "1003-6326",

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TY - JOUR

T1 - Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

AU - Wu, Zhan Wen

AU - Chen, Ji

AU - Piao, Nan

AU - Sun, Cheng

AU - Hassan, W.

AU - Zhang, Xin Hang

AU - Xie, Yu Jun

N1 - Funding Information: Foundation item: Project (201202127) support by Liaoning Provincial Natural Science Foundation of China under Grant; Project (LJQ2011033) support by Program for Liaoning Excellent Talents in University Corresponding author: Ji CHEN; Tel: +86-13516005504; E-mail: [email protected] DOI: 10.1016/S1003-6326(14)63280-5

PY - 2014/6

Y1 - 2014/6

N2 - The corrosion behavior of bulk ultra-fine grained (UFG) Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na2SO4+0.05 mol/L H2SO4 solution by electrochemical measurements. As compared to the coarse grained (CG) counterpart, the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive current. The Mott-Schottky analysis in conjunction with the point defect model indicates that the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.

AB - The corrosion behavior of bulk ultra-fine grained (UFG) Fe-Ni-Cr alloy prepared by equal-channel angular pressing technique was investigated in 0.25 mol/L Na2SO4+0.05 mol/L H2SO4 solution by electrochemical measurements. As compared to the coarse grained (CG) counterpart, the UFG alloy exhibits an acceleration of the active dissolution and a shrunk passive region with a higher passive current. The Mott-Schottky analysis in conjunction with the point defect model indicates that the donor diffusion coefficient in the passive films of the UFG sample increases greatly to one magnitude order higher and the donor density is slightly lower than that of the CG sample.

KW - Fe-Ni-Cr

KW - acid corrosion

KW - passivation

KW - polarization

KW - stainless steel

UR - https://www.scopus.com/pages/publications/84904153566

U2 - 10.1016/S1003-6326(14)63280-5

DO - 10.1016/S1003-6326(14)63280-5

M3 - Article

AN - SCOPUS:84904153566

SN - 1003-6326

VL - 24

SP - 1989

EP - 1994

JO - Transactions of Nonferrous Metals Society of China (English Edition)

JF - Transactions of Nonferrous Metals Society of China (English Edition)

IS - 6

ER -

Electrochemical corrosion behavior of bulk ultra-fine grained Fe-Ni-Cr alloy

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Keywords

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