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The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination

J.L. Davies, C.F. Glover, J. Van de Langkruis, E. Zoestbergen, G. Williams, Geraint Williams Orcid Logo

Corrosion Science, Volume: 100, Pages: 607 - 618

Swansea University Author: Geraint Williams Orcid Logo

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DOI (Published version): 10.1016/j.corsci.2015.08.036

Abstract

Zn–Mg PVD coatings applied to steel substrates are investigated with respect to their resistance to corrosion-driven organic coating delamination by both cathodic and anodic mechanisms. An in-situ scanning Kelvin probe is employed to quantify delamination rates on model polyvinyl butyral coated surf...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa22973
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first_indexed 2015-08-29T02:10:17Z
last_indexed 2018-05-03T18:59:49Z
id cronfa22973
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spelling 2018-05-03T15:32:17.6341900 v2 22973 2015-08-28 The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2015-08-28 MTLS Zn–Mg PVD coatings applied to steel substrates are investigated with respect to their resistance to corrosion-driven organic coating delamination by both cathodic and anodic mechanisms. An in-situ scanning Kelvin probe is employed to quantify delamination rates on model polyvinyl butyral coated surfaces and determine the underfilm potentials associated with the delamination corrosion cell. Measurable rates of cathodic disbondment are observed at Mg compositions of ≤5% w/w, but all other Zn–Mg coatings in the range 10–25% w/w resist delamination for periods of up to 48 h. However, Mg compositions of ≥12% w/w produce a susceptibility to coating failure by anodic undermining. Journal Article Corrosion Science 100 607 618 0010-938X 30 11 2015 2015-11-30 10.1016/j.corsci.2015.08.036 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-05-03T15:32:17.6341900 2015-08-28T15:29:03.1899009 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering J.L. Davies 1 C.F. Glover 2 J. Van de Langkruis 3 E. Zoestbergen 4 G. Williams 5 Geraint Williams 0000-0002-3399-5142 6
title The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
spellingShingle The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
Geraint Williams
title_short The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
title_full The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
title_fullStr The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
title_full_unstemmed The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
title_sort The effect of Mg concentration on the resistance of PVD Zn-Mg coatings to corrosion driven organic coating delamination
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Geraint Williams
author2 J.L. Davies
C.F. Glover
J. Van de Langkruis
E. Zoestbergen
G. Williams
Geraint Williams
format Journal article
container_title Corrosion Science
container_volume 100
container_start_page 607
publishDate 2015
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2015.08.036
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 0
active_str 0
description Zn–Mg PVD coatings applied to steel substrates are investigated with respect to their resistance to corrosion-driven organic coating delamination by both cathodic and anodic mechanisms. An in-situ scanning Kelvin probe is employed to quantify delamination rates on model polyvinyl butyral coated surfaces and determine the underfilm potentials associated with the delamination corrosion cell. Measurable rates of cathodic disbondment are observed at Mg compositions of ≤5% w/w, but all other Zn–Mg coatings in the range 10–25% w/w resist delamination for periods of up to 48 h. However, Mg compositions of ≥12% w/w produce a susceptibility to coating failure by anodic undermining.
published_date 2015-11-30T03:27:14Z
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score 11.035655

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