Hot-dip
galvanized (HDG) reinforcing steel is bare
reinforcing steel coated with a protective
layer of zinc metal. The zinc coating
serves as a barrier to corrosive elements
that the rebar is exposed to when embedded
in concrete. In addition to the barrier
protection that the zinc provides, it also
provides a level of cathodic protection where
the zinc will preferentially corrode when
in contact with bare steel (e.g. a void or
holiday on the surface of the galvanized rebar
will be protected by the surrounding zinc.)
Zinc (galvanized) also possesses other favorable
corrosion characteristics when embedded in
concrete which make it an effective coating
material for corrosion resistance.
The
Hot-Dip Galvanizing Process
Galvanized Rebar Coating Properties
