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Corrosion Resistance of Graphene-Titania Coating on 316 Stainless Steel by Electrophoretic Deposition

Parvizi, Sahar | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49307 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Afshar, Abdollah
  7. Abstract:
  8. The aim of this thesis was creating Titania/RGO coating with electrophoretic method to evaluate the corrosion resistance of stainless steel 316. At first Graphene Oxide were synthesized with modified Hammers method and their physical, chemical and morphological properties have been investigated using XRD, FTIR, EDX, TGA, UV-Vis and Raman analysis. then Graphene Oxide was added to the bath of titanium and was deposited on 316 stainless steel substrates. Moreover, corrosion protection of coating has been examined using Poarization test and Electrochemical Impedance Spectrometry. The effect of deposition parameters on corrosion properties of composite coatings were examined. The key variables Graphene Oxide concentration in the bath coating process, voltage and time. The morphology and phase structure of coating by Scanning Electron Microscope (FE-SEM) and X-ray diffraction analysis were analyzed. TiO2/RGO coating on Stainless Steel substrates reduced corrosion rate 96 percent and increase the polarization resistance from the 13.5 KΩ.cm to 81. Increasing time from 20 to 30 minutes decreases protection efficiency from 96% to 86%. Increasing the voltage to 30 volts with increased protection efficiency to 96%. Increasing the voltage from 30 to 40V decreases protection efficiency from 96% to 57%. TiO2/RGO coating exhibited higher protection efficiency thickness at 30 volt, 1 g / l GO and 20 minutes
  9. Keywords:
  10. Nanocomposite ; Electrophoretic Deposition ; Corrosion Resistance ; Corrosion ; Reduced Graphene Oxide ; Titania Coating ; Titanial/Reduced Graphene Oxide Composite Coating

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