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31. Aug 2021 | Production & Lab

Novel composite material based on sulfonated graphene and sulfonate barium

A recent paper describes the fabrication and the anticorrosive performances of a composite filler that includes sulfonate‑barium and sulfonated graphene.
A novel anticorrosion filler was fabricated by sulfonated graphene sheets wrapping sulfonate‑barium nanoparticles.
Image source: psdesign1 - stock.adobe.com (symbol image).

Graphene material has been used as a superior protection barrier for metal surface due to its excellent impermeability to corrosive electrolyte. However, it is not satisfactory for long-term corrosion resistance of graphene, which has a tendency to agglomerate in the resin coating. In a new study, a novel anticorrosion filler was fabricated by sulfonated graphene (GS) sheets wrapping sulfonate‑barium (BS) nanoparticles. The composite material (BS@GS) exhibited a flake-like structure with numerous BS nanoparticles (particle size of 20–50 nm) on the sheet surface.

Long-term antocorrosion application

The introduction of BS@GS filler in epoxy resin coating could significantly enhance corrosion resistance of carbon steel. For instance, when added only 4 wt% of BS@GS filler, the impedance modulus at 0.01 Hz of composite coating was still maintained as 1.576 × 105 Ω cm2 after immersion in NaCl solution for 168 h, about 2 orders of magnitude higher than pristine resin coating. According to the researchers, the study developed an effective strategy to achieve long-term anticorrosion application for the graphene material.

The study has been published in Progress in Organic Coatings, Volume 158, September 2021.

EC Library Anticorrosive Coatings

Books

Anticorrosive Coatings

This book brings together all the disciplines involved in the creation and use of corrosion protection coatings for metals. It presents the latest insights into the quality and chemistry of surfaces, the proper way to prepare them by conversion treatment, the function of resins and anticorrosion pigments in paints, and novel concepts in corrosion protection. As an added bonus, all the standards and directives mentioned in the text are grouped together in their own chapter for a better overview.

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