期刊
CORROSION SCIENCE
卷 136, 期 -, 页码 285-291出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.03.016
关键词
Graphene nano-platelets; Contact potential; Scanning Kelvin probe; Oxygen permeability
资金
- EPSRC
- Welsh Government
- Tata Steel UK
- Innovate UK [EP/I019278/1, EP/ K000292/1, EP/L010372/1]
- EPSRC [EP/L010372/1, EP/K000292/1, EP/I019278/1] Funding Source: UKRI
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 1.2V 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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