Dissertation > Excellent graduate degree dissertation topics show

Plating Ni-P-Cr/TiO_2 ZrO_2 pairs of nano- composite coatings

Author: ShiYing
Tutor: MaJie
School: Capital Normal University
Course: Physical and chemical
Keywords: microbially influenced corrosion(MIC) seawater corrosion wear resistance nanocomposite coating TiO2 nanoparticles ZrO2nanoparticles
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 91
Quote: 0
Read: Download Dissertation

Abstract


To obtain composite materials with corrosion resistance in seawater and antibacterial property,different shapes of nano-materials of TiO2 were made by AAO tamples. By direct current （DC） electrodeposits technique, we produced series of Ni-P-Cr/TiO2 nanocomposite coatings which contains nano-globeTiO2, nano-tubeTiO2, and nano-wireTiO2 respectlly. The anticorrosion and antibacteria property of the composite coating was evaluated by polarization curves and electrochemical impedance spectroscopy （EIS）. The results of electrochemical tests with more positive-shifting Ecorr, lowest Icorr and relatively high value of polarization resistance （Rp） in the artificial seawater proved that Ni-P-Cr/tube-TiO2 nanocomposite coating displayed better corrosion and antibacterial property .To endow the wear resistance to Ni-P-Cr/TiO2 nanocomposite coatings, ZrO2 nanoparticles was added to the basic bath. The optimal parameters of Ni-P-Cr/TiO2 ZrO2 nanocomposite coatings were deteriminded. The effect of current density, pH value of the electrolyte, plating time and nanoparticles content in electrolyte on the deposition rate, morphology, and particles content in coatings were discussed in details.The anticorrosion and antibacteria property of the Ni-P-Cr/TiO2 ZrO2 nanocomposite coatings was evaluated by polarization curves in 3.5% NaCl and EIS in SRB medium. The results of electrochemical tests with more positive-shifting Ecorr, lowest Icorr and relatively high value of polarization resistance （Rp） in the artificial seawater proved that compared with Ni-P-Cr/TiO2 nanocomposite coatings, Ni-P-Cr/TiO2 ZrO2 nanocomposite coating displayed better corrosion and antibacterial property .After determining the hardness and wear behaviors among composite coatings of Ni-P-Cr, Ni-P-Cr/TiO2 , Ni-P-Cr/ ZrO2, Ni-P-Cr/ TiO2 ZrO2, the hardness and wear resistance of the Ni-P-Cr/TiO2 ZrO2 nanocomposite coating was enhanced obviously .

Related Dissertations

  1. Research and Development of Wear Resistance for Physically Disabled Men Jackets,TS941.2
  2. Inorganic filler of the modified polylactic acid,TQ320.1
  3. Microstructures and Performance of Plasma Cladding High-Chromium Iron-Base Wear Resistant Coating by the Precursor Carbonization-Composition Process,TG174.4
  4. Surface Modification of AZ31 Magnesium Alloy and Pure Titanium by High Current Pulsed Electron Beam,TG166.4
  5. Study on Non-slag Wear Resistance Surfacing Electrode with Lron Powder and Welding Process,TG422.1
  6. The new hardfacing materials and their properties of,TG455
  7. The Structure and Properties of Laser Alloying Layers Coated with Sub-Micron Ceramics,TG174.44
  8. Corrosion of aluminum alloy 5052 seawater,TG172.5
  9. Research on the Precise Blank Forming Worm Wheel of the High Aluminium Zinc Based ZA27 Alloy by the Liquid Forging and Semi-Solid Forging Technology,TG316
  10. Study on the Cathodic Polarization Behavior of 316L and 410 Stainless Steel in Seawater,TG174
  11. The in situ synthesis of composite particles enhanced laser cladding of nickel-based layer,TG174.44
  12. Proton exchange membrane fuel cell materials, design and development,TM911.4
  13. Research on Thermal Spraying Ni/Al Coating on the Surface of AZ91D Magnesium Alloy,TG174.44
  14. Corrosion Resistance Andmechanical Property of AZ31 Magnesium Alloy by Ion Implantation,TG174.3
  15. Study on the Preparation and Formation Mechanism of a Wear Resistance and Self-lubricating Composite Coating on 45 Steel,TG174.4
  16. Study on the Properties of New Type TiC Composites,TB331
  17. Research on NdFeB Electroless Plating Ni-P-Al2O3 Alloy,TQ153
  18. Study on Degradation of Organics with Modified TiO2 Nanoparticles,O643.36
  19. Properties Research of Die-casting AZ91 Mg Alloy Based on Carbon Nanotube Composites,TB33
  20. Study of Corrosion Resistant Coating on 45# Steel Fabricated by Laser Surface Cladding,TG174.44
  21. The Research of Wear-resistance and Process of the Low Chromium White Cast Iron Using Casting-penetrating,TB331

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile