The bridge body of Nanjing Bridge is painted with fluorocarbon paint, and its rust prevention principle is as follows.

It should be a system for steel structure to make fluorocarbon, and the normal process should include zinc-rich primer, mica iron intermediate paint and fluorocarbon topcoat. Zinc-rich and micaceous iron are used for isolation and sealing, and have the function of sacrificial coating to protect the substrate. Fluorocarbon paint is a kind of high weatherability paint, known as the king of paint, which can resist the aging of climate change.