Graphene in Coatings Provides Chemical Resistance
Specialty graphene nanoplatelet dispersion producer Applied Graphene Materials recently announced that new tests have shown that its dispersions can enable paints and coatings to protect a substrate against harsh chemicals in highly aggressive environments.
Chemical permeation is noted to be a major issue in the protective coatings market, from prolonged contract to full submersion or splashes, spills and fumes. This can lead to visual discoloration, gloss reduction and blistering, which affect the coating performance.
According to the emailed release, AGM reported that, in comprehensive testing, its graphene nanoplatelet dispersions in coatings demonstrated “superior” performance in a range of chemical applications. For the testing, the coatings were reportedly submerged in a range of acidic and alkaline solutions.
The graphene-only coatings and graphene-glass flake hybrid systems reportedly outperformed the standalone conventional glass flake additive. Additionally, the coatings with an addition of graphene visually showed less blistering, a marked improvement and hardness.
Based on the results, the AGM technical team stated with graphene, less is more. The performance improvement resulted from a 2.5% addition of AGM’s Genable 1200 graphene nanoplatelet dispersion, equating to 0.025% of graphene nanoplatelet solids, compared to a 20% loading level of glass flake.
According to AGM, by reducing the amount of filler required in the coating, substrate adhesion, higher impact resistance and improvement in flexibility could also be attained. Replacing traditional filler with a small amount of graphene also offers a cost-competitive solution, with great flexibility in formulation.
These protective coatings are used in a wide range of industries in chemical tank linings, linings of pipes for transporting chemicals, floor coatings in chemical environments and structural steelwork coatings. AGM anticipates that this graphene application could also be suitable for composite materials often used in this space.
Additionally, the graphene nanoplatelets dispersion technology provides anticorrosion properties, with the chemical resistance testing offering users another way to innovate, perform and stand out with a graphene-reinforced paint or coating, the company writes.
“AGM’s innovation team have done an outstanding job at demonstrating graphene nanoplatelet materials as a highly effective additive in coatings technology. Using our know-how to disperse graphenes to achieve consistent, reliable performance gains, we are able to bring this new application to market with solid data to support its launch,” said Adrian Potts, Chief Executive Officer of AGM.
“We know graphene works extraordinarily well in anti-corrosion applications and coatings innovators now have broader scope to integrate a graphene solution into a wider product range. I very much look forward to the technology development being presented through our distributor network and the prospect of strong uptake in its application across a range of opportunities.”
Recent AGM News
At the beginning of the year, AGM announced the launch of a new range of industrial graphene-enhanced primers and dispersions. Incorporating its Genable graphene additives, the products offer increased chemical resistance, barrier and anticorrosion properties.
According to AGM, the new line features two epoxy-based primer systems and has extended its Genable 3000 dispersion series.
Genable Epoxy Primer is reportedly a C3-rated hybrid product that combines zinc phosphate with the graphene, allowing it to be used in urban and industrial environments. The Genable CX primer is a high-performance hybrid system of graphene and aluminum for harsher environments, like offshore or marine applications.
The Genable 3000 series uses a combination of graphene with traditional, sacrificial additives to maximize across complimentary systems for surface protection against corrosion. The newly-formulated metal-free and VOC-free hybrid range offers three new dispersions: