Zinc has been used to protect ferrous materials against corrosion for many years. Metallized arc-spray zinc coating is now available on ductile iron pipe produced in the United States and has been widely accepted and specified since its domestic advent several years ago.

This paper will present an overview of corrosion principles, how zinc is applied to ductile iron pipe, how zinc inhibits the corrosion of ferrous materials, and additional enhancements that, in combination with zinc, further extend the life of an already long-lasting product. A recently revised corrosion risk assessment and corrosion abatement tool will also be presented.

Finally, the paper will briefly highlight the performance characteristics of ductile iron pipe related to pressure, surge, flow characteristics, thrust restraint, and sustainability.

Subject
Zinc rich coatings, Corrosion fatigue, Water, Materials, Piping, Top coats, Iron, Stress, Ductile iron pipe, Metals, Polyethylene encasement, Corrosion protection, Zinc
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2019
Association for Materials Protection and Performance (AMPP)
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