Iranian Researchers Develop Self-Healing Rusty Metal Surfaces Using Smart Nano Coating

Saturday, October 13, 2018 - 10:52

Researchers of Sharif University of Technology have developed self-healing smart nano coating which is able to reform rusty metal surfaces.

According to an ISCA report, Dr. Ahmad Ramezani Saadat Abadi explained that in this research, researchers synthesized carbon hollow spheres (CHSs) using the silica templating method, encapsulated 2-mercaptobenzimidazole (MBI) inhibitor in the CHSs and evaluated their corrosion inhibition performance upon exposure of mild steel to a saline solution containing the released inhibitor.

Based on the research, published in Chemical Engineering Journal, the effects of silica template surface modification on the CHS structure was evaluated, while the structure and morphology of the synthesized CHS was analyzed using field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), Raman spectroscopy and X-ray diffraction (XRD) spectroscopy.

Furthermore, thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy mapping (EDS-mapping) and UV–vis were employed to evaluate the MBI release from carbon capsules at different pH values. Corrosion protection performance of the doped CHS was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques.

The results showed tunability of the shell structure between an amorphous carbon and graphene structure using surface modification of the silica templates. Moreover, the MBI release from the CHSs showed to be pH-dependent allowing smart protection of mild steel when exposed to corrosive conditions.

The research was carried out by Dr. Seyed Arash Hadadi, PhD student of faculty of Chemical and Petroleum Engineering, Dr. Ahmad Ramezani Saadat Abadi, faculty member of Sharif University of Technology, in cooperation with Dr. Mohammad Mahdavian Ahadi, faculty member of Surface Coating and Corrosion Department, Institute for Color Science and Technology and also with the advices of researchers from Delft University of Technology in Netherlands.

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