Hot-dip galvanized Steel Angel has the characteristics of surface luster, uniform zinc layer, no leakage, no drip-slip, strong adhesion and strong corrosion resistance. In suburban environment, the standard thickness of hot-dip galvanized rust-proof can be maintained for more than 50 years without repair; in urban or offshore areas, the standard thickness of hot-dip galvanized rust-proof layer can be maintained for 20 years. It doesn’t need to be repaired.