Hot-dip galvanized I-beams are anti-corrosion profiles formed by immersing I-beams in molten zinc at 500℃ to create a zinc alloy coating. The process involves acid washing, fluxing, and galvanizing, with a coating thickness of 30-50 microns. The metallurgically bonded zinc layer is resistant to strong acid and alkali fumes. The products are classified into hot-rolled and cold-rolled types based on the processing method, with hot-rolled being the mainstream in the market, while cold-rolled types are custom-made as needed. The material of this type of steel is mostly Q235B or Q235 carbon steel, with a compressive strength of 300-500 MPa, and the specifications cover a range of waist heights from 10# to 630#. It is mainly used in steel structures of building engineering, chemical equipment, and marine ports and docks in highly corrosive environments. It has the advantages of uniform coating, strong adhesion, and high construction efficiency. In suburban environments, its anti-rust life can reach over 50 years.