Duplex Systems Generate Excellent Return on Investment
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)
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.
Though many specifiers are familiar with one type of corrosion protection or another, few realize the intrinsic value of utilizing two corrosion protection systems together, known as a duplex system. A duplex system is formed by painting... View Details »
This report explores several fully hot-dip galvanized bridges in Ashtabula County, Ohio. (Steel Monthly, July 1991), 1 page
Not for sale. Available for Download Only. View Details »
Based on its maintenance-free durability for 75 years or more in most environments, hot-dip galvanized (HDG) steel has a lower economic cost and environmental impact than paint. It uses a healthy, abundant, and recyclable metal, zinc, to... View Details »
Based on its maintenance-free durability for 75 years or more in most environments, hot-dip galvanized (HDG) steel has a lower economic cost and environmental impact than paint. It uses a healthy, abundant, and recyclable metal, zinc,... View Details »
This handout is a detailed cost comparison of hot-dip galvanizing and paint. The handout features a side-by-side comparison of weather dependency, bond strength, service life, and much more. It also compares the initial cost and maintenance cost of... View Details »
Hot-dip galvanized steel is a highly effective and widely used method of corrosion protection. It is not uncommon to paint galvanized steel in order to further its corrosion fighting properties. Failures in adhesion though, are not uncommon. This... View Details »
Duplex systems, or painting over hot-dip galvanized steel, have been used for decades as a means to enhance corrosion protection. Painting over hot-dip galvanized steel provides the owner/specifier with effective corrosion... View Details »
Duplex systems, or painting over hot-dip galvanized steel, have been used for decades as a means to enhance corrosion protection. Painting over hot-dip galvanized steel provides the owner/specifier with effective corrosion... View Details »
A suggested specification in CSI format for hot-dip galvanizing after fabrication. This guide aids in developing a better hot-dip galvanizing specification. 8 pages. 2002 View Details »