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Preparation of HA/Al2O3/MgO Biocompatible Nanocomposite Coating by Electrophoretic Method on 316 Stainless Steel

Azizi, Amir | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56546 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Afshar, Abdollah
  7. Abstract:
  8. In this research, it has been tried to use alumina and magnesia nanoparticles to hydroxyapatite nano powder, a three-component coating, with corrosion resistance, adhesion and desirable biocompatibility on the 316 stainless steel substrate, by electrophoretic method. It should be applied at 3 voltages of 10, 30 and 50 volts and for 3 minutes. TEA was used as a dispersing agent and ethanol as a solvent to prepare the suspension. Alumina nano powder was added to nanohydroxyapat in two amounts of 10 and 20% by weight and 20% was optimized as the amount, and magnesia nano powder was added to the composition in three amounts of 1, 3 and 5% by weight, which was 3% by weight of the results Was obtained A better one was obtained. The samples covered in the received heat treatment are placed at a temperature of 550 degrees Celsius, and for further investigation, XRD and FTIR characterization analyzes are performed on them. SEM images were used to check the surface morphology. Tests were performed by linear polarization method and coating adhesion strength by Cross-Cut method to determine the most optimal combination of three-component coating. The adhesion strength of the samples was obtained in grades 2B and 3B due to the lack of proper adhesion in the electrophoretic coating method. The corrosion current density in the most optimal condition was obtained as 0.41 μA/cm2 for coating with 20% by weight of alumina and 3% by weight of magnesia at a voltage of 30V, which with this protection value is 26.6% for the sample using from that. The hydroxyapatite coating was only 72.66% for the sample with a three-component coating with alumina and magnesia oxide nanoparticles
  9. Keywords:
  10. Hydroxyapatite Naoparticles ; Triethanolamine ; Electrophoretic ; Alumina Nanoparticles ; Nanoparticles ; 316 Austenitic Stainless Steel ; Biocompatible Corrosion Inhibitor

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