Difference between revisions of "Plating zinc and zinc alloy in metal industry"

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| align="center" style="background:#2266CC;"|'''Literature'''
 
| align="center" style="background:#2266CC;"|'''Literature'''
 
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| style="background:#AACCEE;"| Cold cleaning|| align="center"| || align="center"| || align=”center”| || align=”center”| Chlorinated hydrocarbons (CHC), alcohols, terpenes, ketones, mineral spirits or hydrocarbons ||  align="center"| || align="center"| || rowspan="2" align="center"| BAT for the surface treatment of metals and plastics, August 2006  
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| style="background:#AACCEE;"| Plating with alcine cyanide zinc solutions|| align="center"| || align="center"| || align=”center”| || align=”center”| Zinc oxide, sodium hydroxide, sodium cyanide||  align="center"| Zinc oxide: 10-30 g/l; sodium hydroxide: 80-120 g/l; sodium cyanide: 5-100 g/l|| align="center"| || rowspan="4" align="center"| BAT for the surface treatment of metals and plastics, August 2006  
 
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| style="background:#AACCEE;"| Vapour cleaning|| align="center"|  || align="center"| || align=”center”| || align=”center”| Chlorinated hydrocarbones (CHC), hydrcarbones||  align="center"| || align="center"| vapourized solvent
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| style="background:#AACCEE;"| Plating with alkaline cyanide-free zinc solutions|| align="center"|  || align="center"| || align=”center”| || align=”center”| Zinc oxide, sodium hydroxide, potassium hydroxide||  align="center"| Zinc oxide: 5-15 g zinc/l; sodium hydroxide or potassium hydroxide: 100-150 g/l; ||  
 
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| style="background:#AACCEE;"| Degreasing in emulsion|| align="center"| 60-90|| align="center"| || align=”center”| || align=”center”| Aqueous solution with solvent (paraffin oil, benzole) and surface active- substance that lowers surface tension (triethanolaminoleate)||  align="center"| || align="center"| spray degreasing or use in washing drum|| align="center"| Oberflächenbehandlung von Aluminium; T.W. Jelinek; Eugen G. Leuze Verlag, D-88348, 1997
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| style="background:#AACCEE;"| Plating with acid zinc solutions|| align="center"| || align="center"| || align=”center”| || align=”center”| Alloys: zinc/iron(<1%) from alkaline cyanide-free electrolytes; zinc-cobalt(<3% Co) from acid or cyanide-free electrolytes; zinc-nickel(<15% Ni) from acid (ammonium chloride-based) or cyanide-free electrolytes||  align="center"| || align="center"|
 
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Latest revision as of 18:41, 13 February 2013

Back to EFFICIENCY FINDER FOR METAL INDUSTRY



  • Plating zinc and zinc alloy flowsheet


Plating zinc and zinc alloy flowsheet.jpg

Literature: BAT for the Surface Treatment of Metals & Plastics, 2006


Plating zinc and zinc alloy flowsheet2.jpg


Plating zinc and zinc alloy flowsheet3.jpg


  • Typical parameters of the process
Process Temperature [°C] Heat transfer medium Residence time Chemicals Concentration Details Literature
Plating with alcine cyanide zinc solutions Zinc oxide, sodium hydroxide, sodium cyanide Zinc oxide: 10-30 g/l; sodium hydroxide: 80-120 g/l; sodium cyanide: 5-100 g/l BAT for the surface treatment of metals and plastics, August 2006
Plating with alkaline cyanide-free zinc solutions Zinc oxide, sodium hydroxide, potassium hydroxide Zinc oxide: 5-15 g zinc/l; sodium hydroxide or potassium hydroxide: 100-150 g/l;
Plating with acid zinc solutions Alloys: zinc/iron(<1%) from alkaline cyanide-free electrolytes; zinc-cobalt(<3% Co) from acid or cyanide-free electrolytes; zinc-nickel(<15% Ni) from acid (ammonium chloride-based) or cyanide-free electrolytes


  • Plating zinc and zinc alloy


Plating zinc alloy1.jpg

Literature: BAT for the Surface Treatment of Metals & Plastics, 2006


Plating zinc alloy2.jpg


Plating zinc alloy3.jpg

Literature: BAT for the Surface Treatment of Metals & Plastics, 2006


  • Energy losses from the surface area of heated process solutions


Energy losses from the surface area of heated process solutions.jpg

LITERATURE: BAT for the Surface Treatment of Metals and Plastics, May 2005


Zinc electroplating:


File:Zinc electroplating.jpg

LITERATURE: BAT for the Surface Treatment of Metals and Plastics, May 2005


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