Details
Galvanizing (GAL vuh nyz ihng) is the process of coating such metals as iron and steel with a thin protective layer of zinc or zinc alloy. This layer protects the metals from corrosion (chemical damage). The zinc helps prevent corrosion because it reacts with many chemicals more easily than iron does. For example, when iron reacts with oxygen, it forms iron oxide (rust). However, if the iron has been galvanized, the zinc protects the iron by reacting with the oxygen and forming zinc oxide before rust can form.
Steel is the most commonly galvanized metal. The two most common methods of applying a zinc coating to steel are hot-dip galvanizing and electroplating.
Zinc coating enhances the longevity and performance of steel. Zinc coatings provide the most effective and economical way of protecting steel against corrosion. Zinc-coated or galvanized steel offers a unique combination of properties including high strength, formability, light weight, corrosion resistance, aesthetics, recyclability and low cost. Aluminium and other alloying elements sometimes added to improve the coating performance and reduce costs.