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Tuesday, 24 September 2019
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Raw materials & technologies, Applications

Size-dependent corrosion behavior of graphene oxide coating

Friday, 26 July 2019

What influence does the size of graphene oxide sheets have on corrosion protection? This question was investigated by researchers in a recently published study.

Scientists recently investigated the effect of various graphene oxide (GO) sheets size in the formation of a corrosion resistant coating. Source: peterzayda – stock.adobe.com.
Scientists recently investigated the effect of various graphene oxide (GO) sheets size in the formation of a corrosion resistant coating. Source: p...

Graphene oxide emerges as an effective corrosion resistant coating. However, the influence of graphene oxide sheets size on the corrosion protection remains unclear. In a new report, scientists investigate the effect of different graphene oxide (GO) sheets size in the formation of corrosion resistant coating. They provide valuable input for electrophoretic deposition in which GO sheets in smaller size diffuse faster during deposition to cause more oxygen reduction, thereby forms a coating with higher hydrophobicity, stronger adhesion, and lesser pinholes.

GO sheets with excellent corrosion resistance properties

Detailed electrochemical impedance analysis shows that the coating formed from GO sheets in smaller size exhibits higher activation energy for water diffusion, causing slower water diffusion rate and lower permeation into the coating. The findings suggest that GO sheets in smaller size produce a reliable coating with excellent corrosion resistance behavior.

The study is published in: Progress in Organic Coatings Volume 134, September 2019, Pages 272-280.

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