Hot-dip galvanizing, also known as hot-dip zinc coating, is an effective method for metal corrosion prevention and has been widely used in metal structural facilities across various industries. The process involves immersing steel components, after rust removal, into molten zinc at approximately 800°C, causing a zinc layer to adhere to the surface of the steel. For thin plates below 5mm, the zinc layer thickness must not be less than 65μm, and for thick plates, it must not be less than 86μm, thereby achieving the purpose of corrosion prevention.

In a specific environment, the lifespan of the coating primarily depends on its thickness. The coating thickness, in turn, is determined by the thickness of the steel; that is, thicker steel tends to yield a thicker coating. Therefore, thicker sections of the same steel structure will inherently receive a thicker coating, resulting in a longer lifespan.

For aesthetic, artistic, or use in specific highly corrosive environments, the galvanized layer can be further treated with a paint system (duplex system). As long as the paint system is correctly selected and easily applied, its corrosion resistance effect is 1.5 to 2.5 times better than the combined lifespan of paint alone and hot-dip galvanizing.

In addition to the hot-dip galvanizing method, there are several other methods for protecting steel with a zinc layer. Their advantages and disadvantages are compared in Table 3. Generally, the most widely used, most effective in corrosion prevention, and most economically beneficial method is hot-dip galvanizing.

Jinwei Zinc Steel exclusively uses hot-dip galvanized materials as the base material, with an outer layer of AkzoNobel outdoor powder. The colors are vibrant, with a fading rate of no more than 5% over 15 years in natural environments, and a rusting rate of no more than 3% over 20 years (excluding human factors).