The role of titanium in the initiation of localized corrosion of stainless steel 444
The role of titanium in the initiation of localized corrosion of stainless steel 444
Titanium has been added to ferritic stainless steels to combat the detrimental effects of intergranular corrosion. While this has proven to be a successful strategy, we have found that the resulting Ti-rich inclusions present on the surface play a significant role in the initiation of other forms of localized corrosion. Herein, we report the effect of these inclusions on the localized corrosion of a stainless steel using macro and micro electrochemical techniques. Through the use of scanning electrochemical microscopy, we observe the microgalvanic couple formed between the conductive inclusions and passivated metal matrix. The difference in local reactivity across the material’s surface was quantified using a 3D finite element model specifically built to respect the geometry of the corrosion-initiating features. Combined with electron microscopy and micro elemental analysis, localization of other alloying elements has been reported to provide new insight on their significance in localized corrosion resistance.
Gateman, Samantha Michelle
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Stephens, Lisa Irene
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Perry, Samuel Charles
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Lacasse, Robert
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Schulz, Robert
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Mauzeroll, Janine
af84f034-1e52-4419-a1c2-ce7116db5b07
14 February 2018
Gateman, Samantha Michelle
d184f9aa-cae8-4fcd-bf9b-60fb219b5432
Stephens, Lisa Irene
d6218c34-25bd-4312-b2bd-f115d2af1d50
Perry, Samuel Charles
8e204d86-4a9c-4a5d-9932-cf470174648e
Lacasse, Robert
2ea67c2b-f795-4cee-b774-adb34e5b3bdf
Schulz, Robert
2d996625-a771-4d08-b51a-1aeaf4e42a26
Mauzeroll, Janine
af84f034-1e52-4419-a1c2-ce7116db5b07
Gateman, Samantha Michelle, Stephens, Lisa Irene, Perry, Samuel Charles, Lacasse, Robert, Schulz, Robert and Mauzeroll, Janine
(2018)
The role of titanium in the initiation of localized corrosion of stainless steel 444.
npj Materials Degradation, 2, [5].
(doi:10.1038/s41529-018-0026-5).
Abstract
Titanium has been added to ferritic stainless steels to combat the detrimental effects of intergranular corrosion. While this has proven to be a successful strategy, we have found that the resulting Ti-rich inclusions present on the surface play a significant role in the initiation of other forms of localized corrosion. Herein, we report the effect of these inclusions on the localized corrosion of a stainless steel using macro and micro electrochemical techniques. Through the use of scanning electrochemical microscopy, we observe the microgalvanic couple formed between the conductive inclusions and passivated metal matrix. The difference in local reactivity across the material’s surface was quantified using a 3D finite element model specifically built to respect the geometry of the corrosion-initiating features. Combined with electron microscopy and micro elemental analysis, localization of other alloying elements has been reported to provide new insight on their significance in localized corrosion resistance.
Text
s41529-018-0026-5
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Accepted/In Press date: 2 January 2018
Published date: 14 February 2018
Identifiers
Local EPrints ID: 491775
URI: http://eprints.soton.ac.uk/id/eprint/491775
ISSN: 2397-2106
PURE UUID: aa8a5e92-c319-46cb-8169-21195882372f
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Date deposited: 03 Jul 2024 17:27
Last modified: 12 Jul 2024 02:01
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Author:
Samantha Michelle Gateman
Author:
Lisa Irene Stephens
Author:
Samuel Charles Perry
Author:
Robert Lacasse
Author:
Robert Schulz
Author:
Janine Mauzeroll
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