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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

Corrosion Science, Volume: 136, Pages: 285 - 291

Swansea University Authors: Calvin, Richards, Hamilton, McMurray, Jenny, Baker, Geraint, Williams

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...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: 2018
Online Access: Check full text

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.
Keywords: Graphene nano-platelets; contact potential; scanning Kelvin probe; oxygen permeability
College: College of Engineering
Start Page: 285
End Page: 291