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Hot-Dip Galvanizing Process

View animation of the hot-dip galvanizing process (Flash Required)

Hot-dip galvanized rebar is simply bare steel that is coated with zinc.  In order to coat black reinforcing steel with zinc, it is first cleaned by dipping it in a series of solutions that remove dirt, oil, oxides, and other contaminants from the surface.  Zinc is applied to the clean steel by immersing it into a bath of liquid zinc that is heated to 830 °F (430 °C).  The liquid zinc metallurgically reacts with the iron producing a tightly adherent coating.  The steel is then set aside to cool prior to inspecting it for conformance to the appropriate specifications.

It is inherently simple, and this simplicity is a distinct advantage over other corrosion-protection methods. To learn more about the process of hot-dip galvanizing steel after fabrication contact your regional galvanizing association.