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Metal Coatings

The following table summarises some metal coating typically used in industrial applications, car manufacturing and the building industry. These coatings are usually produced in continuous metal coating lines.

No.

Product Name

Major Elements in Coating (approx. mass%)

Typical Coating Mass/Thickness (g m-2/um) 

Coating Properties

  1.  
Electroplated ZincZn 99.975/10 
  1.  
GalvannealZn 89 Fe 11 Al 0.240-60/6-8Zn rich surface, relatively uniform centre section in good coatings and increasing Fe near steel
  1.  
Hot-dipped galvanized steelZn 99 Al 0.3 Pb/Sb 0.270-140/10-20Al enriched at surface and coating/steel interface. Sometimes C and H seen at the interface depending on the level of steel cleanliness
  1.  
GalfanZn 95 Al 5% La+Ce trace60-140/9-20 
  1.  
AluzincZn 70 Al 3060-140/10-20 
  1.  
GalvalumeZn 44 Al 55 Si 1.580/21Regions rich in Zn and others rich in Al (because of limited solubility), Si increasing towards coating/steel interface, a Al/Zn/Si/Fe quaternary
  1.  
Aluminium coated steelAl 9940/5 
  1.  
Electroplated Zinc-Nickel coated steelZn 89 Ni 1145/6Normally very uniform coating
  1.  
TinplateSn 99.990/5 

First published on the web: 15 January 2000.

Author: Richard Payling