Extending corrosion reistance by Golpar leaf extract
Owing to the variety of industrial applications of anti-corrosion coatings, the use of graphene-based technologies for improving the anti-corrosion performance of the coatings has become a hot topic for research. Composite coatings with smart dual-action can be gained by simultaneous GO nanosheets reduction/functionalisation via corrosion inhibiting materials. A recently conducted study focused on a green/affordable route for GO reduction/functionalising by Golpar leaf (RFGO-GLE) extract molecules. With the aim of boosting the active protection performance of RFGO-GLE, this nanosheet was modified by Zn ions (RFGO-GLE@Zn).
The EIS outcomes of the solution phase study revealed that the RFGO-GLE@Zn nano-layers inclusion (at 1000 ppm) into a seawater solution resulted in almost 80 % inhibition degree, confirming the release of protective agents. The morphological assessments of the scratched zone of the coatings revealed that the inhibitive chemicals were released as soon as mechanical damage produced on the coating. The EIS results of the samples with artificial scratches represented that the total resistance improved with each step of modification, indicating the self-heal ability of the designed nanosheets. Besides, the evaluations revealed that the total resistance of neat EP coating failed during 3 weeks, while, the RFGO-GLE@Zn/EP resisted even up to 7 weeks.
The study has been published in Progress in Organic Coatings, Volume 170, September 2022.