The iron guardrail is made of high-quality hot-dip galvanized sheet to prevent the steel substrate from rusting from the inside to the outside. And after degreasing, cleaning, surface conditioning, phosphating, spray washing, drying, powder spraying, curing and other processes. Anti-ultraviolet agents and antioxidants are added to the imported plastic powder to ensure that the Jintang series guardrail has distinctive weather resistance, corrosion resistance, moisture resistance and long-term surface self-cleaning ability. The color is durable and bright, meeting the ten-year maintenance-free use requirement.