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Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics
Corrosion Science, Volume: 136, Pages: 304 - 310
Swansea University Authors: Geraint Williams , Hamilton McMurray
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DOI (Published version): 10.1016/j.corsci.2018.03.014
Abstract
In-situ Scanning Kelvin probe (SKP) measurements are used to follow the corrosion-driven cathodic delamination kinetics of model coatings comprising graphene nano-platelets (GNP) dispersed in polyvinylbutyral (PVB) adherent to iron and zinc (galvanised steel). To reduce delamination rates by >90%...
Published in: | Corrosion Science |
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ISSN: | 0010-938X |
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2018
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URI: | https://cronfa.swan.ac.uk/Record/cronfa39083 |
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2020-10-26T15:35:39.4128825 v2 39083 2018-03-15 Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 56fc1b17ffc3bdf6039dc05c6eba7f2a Hamilton McMurray Hamilton McMurray true false 2018-03-15 MTLS In-situ Scanning Kelvin probe (SKP) measurements are used to follow the corrosion-driven cathodic delamination kinetics of model coatings comprising graphene nano-platelets (GNP) dispersed in polyvinylbutyral (PVB) adherent to iron and zinc (galvanised steel). To reduce delamination rates by >90% (relative to unpigmented PVB) a GNP volume fraction of 0.056 is required on iron but only 0.028 on zinc. On this basis, together with work function and O2 permeability data it is proposed that the GNP acts principally to slow through-coating oxygen transport on iron; whereas on zinc a galvanic couple forms between zinc and GNP, displacing cathodic oxygen reduction. Journal Article Corrosion Science 136 304 310 0010-938X Graphene nano-platelets; scanning Kelvin probe; cathodic delamination; iron; zinc 15 5 2018 2018-05-15 10.1016/j.corsci.2018.03.014 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-10-26T15:35:39.4128825 2018-03-15T09:56:54.7658276 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering C.F. Glover 1 C.A.J. Richards 2 Geraint Williams 0000-0002-3399-5142 3 Hamilton McMurray 4 0039083-15032018095952.pdf glover2018.pdf 2018-03-15T09:59:52.9700000 Output 1289261 application/pdf Accepted Manuscript true 2019-03-13T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng |
title |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
spellingShingle |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics Geraint Williams Hamilton McMurray |
title_short |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
title_full |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
title_fullStr |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
title_full_unstemmed |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
title_sort |
Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics |
author_id_str_mv |
0d8fc8d44e2a3c88ce61832f66f20d82 56fc1b17ffc3bdf6039dc05c6eba7f2a |
author_id_fullname_str_mv |
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams 56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray |
author |
Geraint Williams Hamilton McMurray |
author2 |
C.F. Glover C.A.J. Richards Geraint Williams Hamilton McMurray |
format |
Journal article |
container_title |
Corrosion Science |
container_volume |
136 |
container_start_page |
304 |
publishDate |
2018 |
institution |
Swansea University |
issn |
0010-938X |
doi_str_mv |
10.1016/j.corsci.2018.03.014 |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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description |
In-situ Scanning Kelvin probe (SKP) measurements are used to follow the corrosion-driven cathodic delamination kinetics of model coatings comprising graphene nano-platelets (GNP) dispersed in polyvinylbutyral (PVB) adherent to iron and zinc (galvanised steel). To reduce delamination rates by >90% (relative to unpigmented PVB) a GNP volume fraction of 0.056 is required on iron but only 0.028 on zinc. On this basis, together with work function and O2 permeability data it is proposed that the GNP acts principally to slow through-coating oxygen transport on iron; whereas on zinc a galvanic couple forms between zinc and GNP, displacing cathodic oxygen reduction. |
published_date |
2018-05-15T03:49:36Z |
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1763752412721446912 |
score |
11.016235 |