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Fabrication of hollow carbon spheres doped with zinc cations to enhance corrosion protection of organosilane coatings

Behgam, R ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.surfin.2020.100696
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Hollow carbon spheres (HCS) are spherical forms of carbon materials that can be used as nanocontainers due to their empty cores. In this work, zinc cations were doped in HCS (Zn@HCS) from an aquatic solution of zinc nitrate salt. Corrosion inhibition of released zinc cations in saline solution on bare mild steel samples was assessed by EIS, polarization, and electrochemical noise measurements. The sample surfaces were characterized through FTIR spectroscopy and grazing incidence XRD analyses after exposure to the test solutions. The results showed improvement in the corrosion resistance in the presence of Zn@HCS in a long immersion period. Zn@HCS were also incorporated in organosilane coating up to 5%. The EIS results showed a significant improvement in corrosion resistance of the samples at 2.5% wt. of Zn@HCS. FESEM and Raman mapping inspections of reinforced silane coatings approved morphological alteration of the coating surface in the form of severe heterogeneity and crack formation at 5% loading of Zn@HCS probably due to inappropriate nanocontainer dispersion. © 2020 Elsevier B.V
  6. Keywords:
  7. Hollow carbon spheres ; Mild steel ; Nano-container corrosion inhibitor ; Silane coating ; Zinc cation
  8. Source: Surfaces and Interfaces ; Volume 21 , 2020
  9. URL: http://library.sharif.ir/web-manage/catalog/resource.do?method=view&id=480598