Proven in Corrosive Environments
Second to masonry, iron was the most common material used to build historic lighthouses. Cast iron was the most common type of iron used. Many of these lighthouses were built in the middle of the 1800s and are still in use today. Because the properties of ductile iron are so similar to that to cast iron, it can be expected that ductile iron will have the same longevity.
Salt Fog Testing
According to accelerated salt fog corrosion tests, ductile iron has twice the corrosion resistance of corten steel. The corrosion rate of ductile iron is half that of corten steel once steady state conditions have been reached.