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Evaluation of multi-layered graphene nano-platelet composite coatings for corrosion control part I - contact potentials and gas permeability
Calvin Richards,
C.F. Glover,
G. Williams,
Hamilton McMurray,
Jenny Baker 
,
Geraint Williams
,
Geraint Williams
Corrosion Science, Volume: 136, Pages: 285 - 291
Swansea University Authors:
Calvin Richards, Hamilton McMurray, Jenny Baker , Geraint Williams
-
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DOI (Published version): 10.1016/j.corsci.2018.03.016
Abstract
The electronic and diffusion-blocking properties of graphene nano-platelets (GNPs) are quantified with a view to understanding their action as (possible) additives to anti-corrosion coatings. Platelet size and thickness are determined by SEM and BET specific surface area measurements. A Scanning Kel...
| Published in: | Corrosion Science |
|---|---|
| ISSN: | 0010-938X |
| Published: |
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa39089 |
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| Abstract: |
The electronic and diffusion-blocking properties of graphene nano-platelets (GNPs) are quantified with a view to understanding their action as (possible) additives to anti-corrosion coatings. Platelet size and thickness are determined by SEM and BET specific surface area measurements. A Scanning Kelvin probe is used to show that a contact potential of up to 1.4 V develops between GNP particles and various metal substrates: silver, copper, iron and zinc. A novel photochemical method is used to show that oxygen permeation rates through a PVB-GNP (polyvinylbutyral) composite coating decrease by over an order of magnitude as GNP volume fraction increases to 0.056. |
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| Keywords: |
Graphene nano-platelets; contact potential; scanning Kelvin probe; oxygen permeability |
| College: |
Faculty of Science and Engineering |
| Start Page: |
285 |
| End Page: |
291 |