Since 1890, Duncan Galvanizing has enjoyed a reputation as one of the finest hot dip galvanizing companies in the United States. Today, we're the recognized leader in full-service architectural metal coatings, providing the most effective form of corrosion protection and aesthetic enhancement for metals anywhere from structural steel to smaller pieces like steel pipes, steel rails, fence posts and boat trailers. Duncan Galvanizing has always been on the cutting edge of metal corrosion protection. From galvanizing milk containers in the late 1890's to creating a patented process in the 1960's for painting galvanized steel (Colorgalv), we provide state-of-the-art hot dip galvanizing and high-tech architectural finishes for ANY metal substrate, including galvanized steel and "black steel" (uncoated steel).