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Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors
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Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors

Haddadi, S. A

Fabrication and characterization of graphene-based carbon hollow spheres for encapsulation of organic corrosion inhibitors

Haddadi, S. A ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cej.2018.06.063
  3. Publisher: Elsevier B.V , 2018
  4. Abstract:
  5. In this work, we 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. 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. © 2018 Elsevier B.V
  6. Keywords:
  7. Carbon hollow sphere ; Corrosion inhibitor ; Graphene-structure ; Hard template ; Amorphous carbon ; Catalyst activity ; Corrosion inhibitors ; Electrochemical corrosion ; Electrochemical impedance spectroscopy ; Encapsulation ; Energy dispersive spectroscopy ; Graphene ; Low carbon steel ; Mapping ; Scanning electron microscopy ; Silica ; Spheres ; Steel corrosion ; Surface treatment ; Thermogravimetric analysis ; Transmission electron microscopy ; Carbon hollow-spheres ; Corrosion inhibition performance ; Corrosion protection performance ; Energy dispersive X ray spectroscopy ; Fabrication and characterizations ; Field emission scanning electron microscopes ; Hard templates ; Organic corrosion inhibitors ; Corrosion protection
  8. Source: Chemical Engineering Journal ; Volume 352 , 2018 , Pages 909-922 ; 13858947 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S138589471831101X