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Duplex systems, painting or powder coating over hot-dip galvanizing, have steadily grown in popularity over the last decade. Specifiers often utilize duplex systems on projects where corrosion protection is pertinent, but aesthetics, namely color selection, is also a high priority. The combination of hot-dip galvanizing and paint ensures the designer does not have to sacrifice either desire. But to consider a duplex system as merely a cosmetic extra to the durability of hot-dip galvanizing is a gross misrepresentation. In addition to visual benefits, duplex systems provide cost savings and extended service life. To calculate how you can save money over the life of your next project by utilizing a duplex system, visit the AGA life-cycle cost calculator at lccc.galvanizeit.org

This handout details the life-cycle savings of utilizing a duplex system of paint over galvanized steel. It explains how duplex systems work and focuses on the maintenance cycle, life-cycle, and return on investment of this type of corrosion protection system. (2 pages, revised in 2012) 

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Available for download in PDF format. Terms of Use.

Copies of this resource are available for purchase. Architects, engineers, and other specifiers in North America may request a single copy of any publication at no charge, unless otherwise indicated. Multiple copies require a $25.00 (US funds) minimum order, plus shipping and handling. Prepayment is required. (Member galvanizers are not eligible for complimentary printed copies and require a $75.00 minimum order.) Non-member galvanizers must contact the AGA directly at 720-361-4483.

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