Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steel

Fahd Almuaili; Samuel Mcdonald; Philip Withers; Anthony Cook; Dirk Engelberg

doi:10.1016/j.corsci.2017.05.023

Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steel

Fahd Almuaili, Samuel Mcdonald, Philip Withers, Anthony Cook, Dirk Engelberg

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

Abstract

The reactivation of a corrosion pit under the synergetic effect of strain and electro-chemical polarisation has been observed in a type 304L stainless steel using X-ray computed tomography. The pit reactivation process was associated with the formation of a new pit, directly adjacent to a pre-existing pit. Pit growth kinetics were estimated, revealing an increase of the diffusivity parameter (D_eff ΔC) from 3.0x10^-8 mol.cm^-1.s^-1to 4.5x10^-8 mol.cm^-1.s^-1 with the application of strain, indicating higher metal dissolution rates. Applied strain resulted in fractured lacy metal covers, and its effect on pit growth kinetics is discussed.

Original language	English
Pages (from-to)	12-19
Number of pages	8
Journal	Corrosion Science
Volume	125
Early online date	31 May 2017
DOIs	https://doi.org/10.1016/j.corsci.2017.05.023
Publication status	Published - 15 Aug 2017

Keywords

Pitting corrosion
Reactivation
Electrochemical polarisation
Stainless steel
time-lapse X-ray computed tomography

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10.1016/j.corsci.2017.05.023Licence: CC BY

Structural Evolution across multiple time and length scales
Withers, P. (PI), Cartmell, S. (CoI), Cernik, R. (CoI), Derby, B. (CoI), Eichhorn, S. (CoI), Freemont, A. (CoI), Hollis, C. (CoI), Mummery, P. (CoI), Sherratt, M. (CoI), Thompson, G. (CoI) & Watts, D. (CoI)
1/06/11 → 31/05/16
Project: Research

Cite this

@article{b5a18afedc2c410f994356708c93f610,

title = "Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steel",

abstract = "The reactivation of a corrosion pit under the synergetic effect of strain and electro-chemical polarisation has been observed in a type 304L stainless steel using X-ray computed tomography. The pit reactivation process was associated with the formation of a new pit, directly adjacent to a pre-existing pit. Pit growth kinetics were estimated, revealing an increase of the diffusivity parameter (Deff ΔC) from 3.0x10-8 mol.cm-1.s-1 to 4.5x10-8 mol.cm-1.s-1 with the application of strain, indicating higher metal dissolution rates. Applied strain resulted in fractured lacy metal covers, and its effect on pit growth kinetics is discussed.",

keywords = "Pitting corrosion, Reactivation, Electrochemical polarisation, Stainless steel, time-lapse X-ray computed tomography",

author = "Fahd Almuaili and Samuel Mcdonald and Philip Withers and Anthony Cook and Dirk Engelberg",

year = "2017",

month = aug,

day = "15",

doi = "10.1016/j.corsci.2017.05.023",

language = "English",

volume = "125",

pages = "12--19",

journal = "Corrosion Science",

issn = "0010-938X",

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TY - JOUR

T1 - Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steel

AU - Almuaili, Fahd

AU - Mcdonald, Samuel

AU - Withers, Philip

AU - Cook, Anthony

AU - Engelberg, Dirk

PY - 2017/8/15

Y1 - 2017/8/15

N2 - The reactivation of a corrosion pit under the synergetic effect of strain and electro-chemical polarisation has been observed in a type 304L stainless steel using X-ray computed tomography. The pit reactivation process was associated with the formation of a new pit, directly adjacent to a pre-existing pit. Pit growth kinetics were estimated, revealing an increase of the diffusivity parameter (Deff ΔC) from 3.0x10-8 mol.cm-1.s-1 to 4.5x10-8 mol.cm-1.s-1 with the application of strain, indicating higher metal dissolution rates. Applied strain resulted in fractured lacy metal covers, and its effect on pit growth kinetics is discussed.

AB - The reactivation of a corrosion pit under the synergetic effect of strain and electro-chemical polarisation has been observed in a type 304L stainless steel using X-ray computed tomography. The pit reactivation process was associated with the formation of a new pit, directly adjacent to a pre-existing pit. Pit growth kinetics were estimated, revealing an increase of the diffusivity parameter (Deff ΔC) from 3.0x10-8 mol.cm-1.s-1 to 4.5x10-8 mol.cm-1.s-1 with the application of strain, indicating higher metal dissolution rates. Applied strain resulted in fractured lacy metal covers, and its effect on pit growth kinetics is discussed.

KW - Pitting corrosion

KW - Reactivation

KW - Electrochemical polarisation

KW - Stainless steel

KW - time-lapse X-ray computed tomography

U2 - 10.1016/j.corsci.2017.05.023

DO - 10.1016/j.corsci.2017.05.023

M3 - Article

SN - 0010-938X

VL - 125

SP - 12

EP - 19

JO - Corrosion Science

JF - Corrosion Science

ER -

Strain-induced Reactivation of Corrosion Pits in Austenitic Stainless Steel

Abstract

Keywords

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Structural Evolution across multiple time and length scales

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