Dissertation > Excellent graduate degree dissertation topics show

Study on the Preparation and Properties of Self-Assembled Monolayers

Author: ZhuHai
Tutor: WeiGang
School: Beijing University of Chemical Technology
Course: Materials Science
Keywords: carbon steel organic-inorganic hybrid material self-assembled monolayers phosphate coating anticorrosion
CLC: TB383.2
Type: Master's thesis
Year: 2007
Downloads: 512
Quote: 1
Read: Download Dissertation

Abstract


Carbon steel is active and easy to be oxidized, so it is hard to it isdifficult to form self-assembled monolayers on the surface. in order solvethis problem, A purpose is put forward that a layer of thin and compactphosphate coating is first formed on the surface of steel, and thenalternatively sodium silicate layer and siloxane layer are adsorbed by thelayer by layer technology. in the same time idiographic progress ofself-assembling and anticorrosive performance of self-assembledmonolayers are discussed. The result of experimentation indicates thatAdding some accelerant and surface active agent to zinc oxide,phosphoric acid and nitric acid, an optimal batch formula is accomplished.the optimal technics is dipping carbon steel with clean surface into asolution of H3PO4 50ml/L, H3NO3 10ml/L, ZnO 23g/L, NaNO2 1．5g/L,C6H8O7 1．5g/L for 10 to 15 minutes at a temperature of 40 to 60 degree.this progress has the merit of broad range of temperature, stable, shorttime, few settlements, easy to adjust, good performance of anticorrosionand good cohesion to self-assembled monolayers. the progress ofalternatively sodium silicate layer and siloxane layer adsorbed on thesurface of phosphate coating the sort of silicones, time of hydrolyzing,concentration of water glass and heating influence the performance ofanticorrosion are key factors, the optimizing progress of self-assemblingis as follows: dip the pretreated carbon steel into KH-560 hydrolyticsolution for 30 minutes, and lift it slowly and then dip into 0．1mol/Lwater glass for 15 minutes, the self-assembled monolayers can beprepared after 5-10 times recycled treatment. The bluestone bitexperiment of the self-assembled monolayers prepared under such condition can reach 723s, which indicated that the monolayer canseparate the metal substrate and the surrounding environment effectively,and therefore protect the metal substrate. Electrochemical experimentresults indicate that the root cause of excellent anticorrosive performanceof the self-assembled monolayers is to make the metal under passivationstatus.

Related Dissertations

  1. Preparation and Anticorrosion Properties of Doped Polyaniline/Epoxy Coating,TQ637
  2. Cold Rolling Process Optimizing on Structural Carbon Steel,TG335.12
  3. Magnesium alloys and corrosion resistance of phosphating process,TG174.4
  4. Xuanhua Steel the BOF efficient dephosphorization new technology,TF713.3
  5. Electrochemical Distribution Characteristics of Corrosion Behavior of Carbon Steel Immersed in Seawater,TG172.5
  6. Structural Optimization Selection of Tianjin Orthotropic Steel Bridge Deck Pavement,U443.33
  7. Experimental Study on Deep Desulphurization for Ultra-low Carbon Steel in Pansteel,TF704.3
  8. Research on Corrosion Protection Technology of Gas Field Gathering System in Daqing Oil Field,TE983
  9. The Study on Atmospheric Corrosion Behavior of Carbon Steel under Thin Electrolyte Layer in Air Containing SO2,TG172.3
  10. Study on Microstructure and Properties of Laser Surface Cladding of Iron-based Alloy and B4C Ceramic Material on Carbon Steel,TG174.453
  11. Rare Inhibitor on Carbon Steel Corrosion Resistance,TG174.42
  12. Development of Mold Powder for Continuous Casting Slab Medium-carbon Steel,TF777
  13. Research on the Corrosion Mechanism of Galvanization Vessel and Its Resistent Zinc Coatings,TG172
  14. Effect of Si on Corrosion Resistance of Cabon Steel in Atmospheric Conditions,TG174.3
  15. Research on Behaviors of Carbon Steel Corrosion under Alkalescent Water Conditioning,TG174.1
  16. Study on Sealing and Electrophoresis Anticorrosion Technology of Bond NdFeB Magnet,TM86
  17. Influence of Microbes on Corrosion of Carbon Steel in Seawater,TG172
  18. RE atmospheric corrosion resistance of low- carbon steel can influence research,TG174.3
  19. Computer Simulation of Craft Research of Low Temperature Rolling,TG335.1
  20. Several steel pitting electrochemical characteristics of early,TG172
  21. Studies on the Coatings for Carbon Steel High-temperature Oxidation Resistance,TG174.4

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