Hot-dip galvanized I-steel is also called hot-dip galvanized I-steel or hot-dip galvanized I-steel. It is to immerse the I-beam after derusting into molten zinc at about 500 ℃ to attach a zinc layer to the surface of the I-beam, thus achieving the purpose of anti-corrosion. It is suitable for strong corrosive environments such as various strong acids and alkali fogs.