Jatropha oil in anti-corrosion coatings

During a recent study, bio-based acrylated and epoxidised jatropha oil was incorporated with graphene nanoplatelets to formulate corrosion resistance coatings.

A Jatropha plant.
Jatropha oil is not edible and therefore particularly well suited as a substitute for petrochemical products. Image source: xuanhuucenter - Pixabay (symbol image).

Vegetable oil has been extensively investigated as a precursor to eco-friendly coatings as an alternative to petrochemical-based resources due to its lower carbon footprint properties. In view of this, jatropha oil (JO), a type of non-edible oil, has received significant attention in this field. A new study was undertaken to utilise acrylated epoxidised jatropha oil (AEJO) resin and to evaluate the anti-corrosion performance with the addition of graphene nanoplatelets (GNP).

Good anti-corrosion resistance

Test results showed that the corrosion performance of AEJO-GNP nanocomposites coatings improved from the blank coating. Among all coatings tested, AEJO-0.5 wt% GNP exhibited the strongest barrier property and maximum performance in corrosion protection. The result was supported by water contact angle and pull-off adhesion tests. In addition, the highest pull-off adhesion strength for GNP fillers added coatings was established at 0.5 wt% of GNP. High hydrophobicity and pull-off adhesion strength coatings provided a physical barrier that created a tortuosity pathway for corrosive electrolytes to reach the metal surface and thus showed better anti-corrosion resistance.

The study has been published in Progress in Organic Coatings, Volume 175, February 2023.

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