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Preparation and Characterization of Inhibitor Loaded Nanodiamond for Anticorrosion Coating

Rahmani, Pooria | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51237 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Shojaei, Akbar; Pirhadi, Nahid
  7. Abstract:
  8. In recent years, nanodiamond (ND) has been used as reinforcement in polymeric nanocomposites in order to improve mechanical properties, thermal conductivity, etc. The surface of nanodiamond has several functional groups which make it appropriate adsorbent. In this study, nanodiamond was modified with dodecylamine corrosion inhibitor and was utilized (1wt %) in epoxy based nanocomposite. Fourier transform infrared spectroscopy (FTIR) analysis was used to confirm the surface modification of Nanodiamond. In order to estimate the loading amount of corrosion inhibitor, thermogravimetric analysis was investigated. FE-SEM analysis demonstrated nanoparticle dispersibility in epoxy matrix. Regarding this, oxidized Nanodiamond (OND) formed agglomerated structure in matrix, but the modified sample (DND) had desirable dispersibility and distribution. Using differential scanning calorimetry (DSC), it was found that the presence of Nanodimond, in particular, the modified one, accelerates and completes the epoxy curing process. The coating thickness was measured about 30 microns. An electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance of three samples of pure epoxy coating (EP), epoxy-oxidized nanodiamond (EP-OND) and epoxy-dodecylamine modified nanodiamond (EP-DND). It demonstrates that the presence of the nanodiamond generally prevents from corrosive ions penetration and increases corrosion resistance. However, the coating containing modified nanodiamond showed higher barrier effect due to better dispersion in epoxy resin, which results the highest corrosion resistance more than a month after immersion in brine
  9. Keywords:
  10. Nanodiamond ; Corrosion Inhibitors ; Nano-Composite Coating ; Surface Modification ; Anticorrosive Coating ; Dodecil Amine

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