Dissertation > Excellent graduate degree dissertation topics show

Process and Properties of Electrodeposited Nanocomposite Coatings

Author: HeLiFang
Tutor: GuoZhongCheng
School: Kunming University of Science and Technology
Course: Physical Chemistry of Metallurgy
Keywords: Ni-WP-SiO2 RE-Ni-W-P RE-Ni-W-P-SiO2 Nanocomposite electrodeposition Corrosion resistance Hardness High temperature oxidation resistance Wear resistance
CLC: TG174
Type: Master's thesis
Year: 2006
Downloads: 258
Quote: 2
Read: Download Dissertation

Abstract


In this paper, the nano-composite coating process, has more than ordinary micron composite coating excellent corrosion resistance, hardness, resistance to high temperature oxidation properties of RE-Ni-WP the Ni-WP-SiO on 2 , RE-Ni-WP-SiO 2 composite coatings. Shimadzu EPMA-1600 electron microprobe Rigaku 3015 X-ray diffraction, optical microscopy, the HX-1 micro hardness tester, HDV 7 transistor potentiostat, corrosive media soak means of various coating The composition, properties and structure were tested. According to thermodynamic data, drawn at 298K Ni-PH 2 O, potential-PH diagram using potential-PH diagram from thermodynamic analysis of the formation mechanism of the electrodeposition Nanocomposite Coatings and its influencing factors are analyzed the feasibility of nanocomposite electrodeposition. The optimum conditions for the amount of deposition of particles in the nano-composite coatings and coating hardness, corrosion resistance, high temperature oxidation resistance can be obtained by combining different conditions: the bath CeO 2 6g / L, the concentration of SiO 2 concentration of 70g / L; pH = 5; T-= 40 ° C; the J k = 10A/dm 2 . Experiment RE-Ni-W, RE-Ni-WP, Ni-WP-SiO 2 , RE-Ni-WP-SiO 2 several composite coating hardness, resistance erosion resistance, high temperature oxidation resistance study results show that: both the the plating condition or heat treatment conditions, the nanocomposite coating hardness than-micron composite coating hardness. And the nanocomposite coating adhesion than micron composite coating adhesion. Nanocomposite coating, due to the small size effect of nano-particles, making nanoscale particles uniformly dispersed in the coating and can cause the grain refinement of the coating nanoscale rare earth is added, making the performance of nano-composite coatings than micron composite coating performance superiority. RE-Ni-WP and Ni-WP-SiO 2 RE-Ni-WP-SiO 2 three nano-composite coating hardness order: Ni-WP- composite coating of SiO 2 nano> RE-Ni-WP-SiO 2 nanocomposite coating> RE-Ni-WP nano-composite coatings. Different composite coating (plated and annealed at 400 ℃ 1h) comparative study of corrosion resistance in hydrochloric acid and sulfuric acid, and hydrochloric acid and sulfuric acid in the anode polarization curve comparison study showed that, regardless of the plated state or heat treatment conditions, the nanocomposite The corrosion resistance of the coating micron composite coating superior corrosion resistance, and corrosion resistance of the two are significantly better than 316L stainless steel. Pros and cons of various nano-composite coatings order: RE-Ni-WP-SiO 2 nanocomposite coating> nanocomposite coatings of Ni-WP-SiO > RE-Ni-WP nanocomposite coating> RE-Ni-WP coating. The high temperature oxidation resistance of the composite coatings of different particle size: Nanocomposite Coatings and high temperature oxidation resistance is superior than micron composite coating of high temperature oxidation resistance. Nanocomposite coating, the pros and cons of the order of the high temperature oxidation resistance of> RE-Ni-WP-SiO 2 nanocomposite coatings> Ni-WP-SiO 2 nano composite coating

Related Dissertations

  1. The Effect of Current Density and Electric Field on Ni and Its Alloy Electrodeposition for Copper Crystallizer,TQ153.2
  2. A Study on the Electrodeposition of Zn-Co and Zn-Ni Alloys in the Reline Room Temperature Ionic Liquid,TQ153.1
  3. Synthesis and Application of the chloro- methoxy fatty acid methyl esters,TQ414.8
  4. Research and Development of Wear Resistance for Physically Disabled Men Jackets,TS941.2
  5. Study on Technics & Performance of Nano Electroless Composite Plating on 20~# Steel,TQ153
  6. Prototype Development of Intimate Apparel Mannequin,TS941.2
  7. Molecular Identification of Hardness-related Genes and Analysis of Molecular Mechanism of PINA Null in Bread Wheat,S512.1
  8. Research on Electrochemical Synthesis and Application of Conductive Polyaniline,O633.21
  9. Anterior crowns analysis of the clinical effects,R783.4
  10. Ni / TiO 2 -SiO 2 Preparation, Characterization and Hydrogenation of Maleic Anhydride,TQ225.2
  11. Studies of Plasma Spray Metal-Ceramic Compounds Coatings on Q245r Steels,TG174.44
  12. Study on Preparation and Properties of Electrodeposited Ni-W-P Alloy Film in the Stabilized Magnetic Field,TG174.4
  13. Research of Ni-Based Catalysts for Hydrogen Generation from NaBH4 Hydrolysis,O643.36
  14. Electroless Ni-Pon the Bulk Nanocrystalline Ingot Iron,TQ153.1
  15. Study on Corrosion Resistance and Condensation Property of Ni-P/Nano SiO2 Composite Coatings,TG174.4
  16. The Study of Microstructure and Performance of La2 O3+CeO2-Ni-WC Composite Coating by Vacuum Fusion Sintering,TG174.44
  17. Preparation and Characterization of Doped Cu3N Thin Films by Magnetron Sputtering,O484.1
  18. Property Research on NiMnGa Magnetic Functional Materials,TG139.6
  19. Construction of RNA Interference Vectors of Pin Genes Determining Grain Hardness and Genetic Transformation in Wheat,S512.1
  20. Preparation, Characterization and Performance of the Bio-coatings on the Surface of Pure Titanium Based on Micro Arc Oxidation,R318.08
  21. Ni / H-BEA catalyst, lean on the selective reduction of nitrogen oxides in exhaust gas,X734.2

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection
© 2012 www.DissertationTopic.Net  Mobile