Galvanizing-Protective action

- Nov 04, 2017-

Protective action

Galvanising protects the base metal in three ways:

  • It forms a coating of zinc which, when intact, prevents corrosive substances from reaching the underlying steel or iron.

  • The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.

  • The zinc protects its base metal by corroding before iron. For better results, application of chromates over zinc is also seen as an industrial trend.