Electroplating & Protection
Electroplating - Coating the surface of a metal with the thin layer of another metal.
Benefits of electroplating:
- Thin layer of metal is cheaper than the whole product being made of the metal.
- Change colour or appearance.
- Stop corrosion or rust on the main metal.
Galvanising - Coating an iron compound in a thin layer of zinc.
Galvanising can be carries out using electroplating, or by dipping the object in molten zinc.
Sacrificial Protection - A method of rust prevention by using a metal such as zinc or magnesium to cover up iron compounds so that the iron doesn't rust
The sacrifial metal will eventually corrode away.