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Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part II – Cathodic delamination kinetics

C.F. Glover, C.A.J. Richards, Geraint Williams Orcid Logo, Hamilton McMurray

Corrosion Science, Volume: 136, Pages: 304 - 310

Swansea University Authors: Geraint Williams Orcid Logo, 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%...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39083
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first_indexed 2018-03-15T14:10:35Z
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spelling 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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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 1
active_str 0
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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score 10.998093

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