Zinc Electroplating

 
Zinc Electroplating provides corrosion resistance to the steel components by acting as a barrier 
and sacrificial coating. Zinc is more electrochemically reactive than steel, so when exposed to a
corrosive environment, the zinc plating corrodes sacrificially, delaying rust formation on the steel
component even after portions of bare steel are exposed.
 
Zinc electroplating is a method of depositing zinc metal on the surface of another metal, such as steel,
by immersing the steel component in an appropriate plating bath and applying electrical current.
Zinc travels through the electrolytic bath from the zinc anodes and attaches to the surface of the steel
component. The thickness of zinc plating depends on the time spent in the plating bath, the amount of
current, and the chemical composition of the bath.
 
There are Australian and various Industry Standards and Specifications that detail the performance
requirement of the zinc coating which is applied to the steel component. The standards include information
on zinc thickness, chromate coatings, salt spray performance and other quality requirements pending the
steel components application and corrosive environment.
 

 

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