Corrosion Model
Zinc coatings have a higher
chloride (Cl -) corrosion threshold (2-4
times) than that of uncoated steel,
significantly extending the time until
corrosion initiation. Once corrosion of the
zinc coating does occur, the properties of
the corrosion products and their ability to
migrate into the concrete matrix reduces
stress generation in the surrounding
concrete, further extending the life of the
reinforced concrete structure. Black and galvanized rebar
corrosion performance in concrete can be
shown graphically as follows:
Accelerated
Testing/Salt Spray
