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.