- •1. Explain electrodeposition technology of tungsten
- •2. Discraibe the electrodeposition technoly of molybdenum.
- •3. Explain electrodeposition technoly of rhenium
- •4. Explain electrodeposition technoly of platinium.
- •6. Explain electrodeposition technoly of rhodium
- •7. Explain electrodeposition technoly of osmium.
- •10. Give a certificate of electrochemical methods of Thallium
- •11. Explain electrochemical deposition methods Iridium
- •12. Give an explanation about Electrochemical methods of obtaining germanium.
- •13. Tell about electrochemical methods of producing niobium
- •14. Give an explanation about Electrochemical obtaning methods of vanadium
- •16. Explain about the technology of electrochemical production of bismuth
- •17.Tell about the technology of electrochemical production of titanium
- •18. Tell about the technology of electrochemical production of gold
- •19.Tell about the technology of electrochemical production of silver.
- •20. How to prepare electrolyte for electrodeposition of niobium from organic solution
- •21. How to prepare alkaline glycerol electolyte for electrodeposition of antimony.
- •22. How to prepare alkaline electolyte for electrodeposition of Gallium
- •24. Explain Kazarov, Loshkarev and chloride electrolyte solution for obtain indium.
- •25. Discribe about Marchenko, Ionychev and cyanide electrolyte solution for obtain indium.
- •26.Discribe about sulforic acid and hbf4 electrolyte solution for obtain indium.
- •27. Iurev and Icakova Elctrolyte for obtain ruthenium.
- •28. How to prepare chloride or Kadaner electrolyte for electrodeposition of ruthenium
- •29. How to prepare electrolyte solution for electrodeposition of ruthenium
- •30.Discribe about electrolyte solution for electrodeposition of platinium.
- •31. How to prepare chloride electrolyte for electroreduction of paladium
- •32. How to prepare chloride electrolyte for electroreduction of paladium
- •33.How to prepare nitrite electrolyte for electroreduction of paladium
- •34. How to prepare sulfamine and monoethanolamine electrolyte for electroreduction of paladium
- •35. How to prepare amino chloride electrolyte for electroreduction of rhodium
- •36. Tell about electrolyte composition for obtain of osmium
- •37. Explain chloride electrolyte for obtain Iridium by electrochemical process.
- •38. Tell about nitrite electrolyte solutions for deposition of platinium.
- •39. How to prepare nitirc electrolyte for electrodeposition of bismuth
- •40. How to prepare organical electrolyte for electrodeposition of bismuth.
- •41. How to prepare electrolyte solution for electrodeposition of arsenium
- •42. Explain cyanide electrolyte solution forelectro deposition of silver.
- •43. Explain cyanide electrolyte solution for electro deposition of gold.
- •44. How to prepare sulfamine and monoethanolamine electrolyte for electroreduction of palladium
- •45. How to prepare amino chloride electrolyte for electroreduction of rhodium
14. Give an explanation about Electrochemical obtaning methods of vanadium
Vanadium has a density of 6.11 g/cm3 and a melting point of 1900° C. the Atomic mass 50,94. Metallic vanadium is soluble in nitric and hydrofluoric acid and in concentrated sulfuric acid when heated. The standard electrode potential -1,175 V and the electrochemical equivalent of 0.95 g/(A-h). For electrochemical deposition of vanadium from the melt of the following composition (% by weight) and mode of operation: Dibromide of vanadium............. 6-8 Potassium bromide............ . . 30-35 Sodium chloride . . . .... ... 25-30 Magnesium chloride . . ...........17-21 Lithium chloride............12-16 Temperature, °C............. 500-100 Cathode current density, A/dm2 ......0,1—50 The process of deposition of vanadium, lead in hermetic electrolysis, in an environment of purified argon, with anodes of the metal vanadium. The thickness of the coating layer can be increased to 2-3 mm in the presence of dense-porous-free structure.
15. Explain the electrochem obtaning technology of Antimony. Antimony is a brittle silvery metal with a density of 6.68 g/cm3 and a melting point of 630 degrees.The atomic weight of antimony 121,76,the standard electrode potential of +0.20 V and the electrochemical equivalent of 1.51 g/(A*h). Electroplating antimony can be used for partial replacement of tin, electronic circuits, to replace cadmium in the protection of steel components against corrosion in marine conditions and for other branches of engineering. During the deposition of antimony as the anode used cast metal brand SU-0.Elatrolet stable in use, since the dissolution of the anodes is also a current output of close to 100%. Armanavicius K, prepared by dissolving antimony oxide in tartaric acid followed by neutralization with potassium hydroxide.The electrolyte needs to be processed in 10-20 hours at a current density of 0.25 A/dm2. The ratio of the area of the anode to the coated surface is to maintain a 4:1 ratio. The thickness of the layer of antimony can be reduced to 200мкм and more. Galvanic deposition of antimony of high purity can also be produced from glycerol-based electrolytes. To compile eletrolyte use of antimony trioxide, which is weighed based on the concentration of antimony in the electrolyte 80-10 g/l in terms of metal. Then make up a solution containing 300 g/l of glycerol and 50 g/ l of potassium hydroxide or sodium hydroxide, heated it up to 60-70 degrees and injected into it the antimony trioxide with stirring until it dissolves, which takes about 0.5 hours. Deposition of antimony in lead graphite anodes at the operating temperature 40-50 C and a current density of 2-5 A/dm2. The current efficiency is about 100%.The depletion of eletrolyte the antimony is allowed up to a concentration of 25-30 g/l, after which elatrolet introduce a new batch of Sb(OH)3 and repeat the process again. Specific consumption of glicerina is 0.25 kg and the alkali consumption of 0.15 kg per kg of deposited metal.