Different production processes
The production processes of hot-dip galvanized steel sheet and galvanized steel sheet are different. Hot-dip galvanized steel sheet is to immerse the steel in molten zinc liquid, and after taking out, cooling, cleaning and other process steps, the zinc layer is fixed on the surface of the steel sheet to form a protective film, thereby achieving the effect of anti-corrosion. Galvanized steel sheet is electroplated by coating the surface of the steel sheet with zinc and then processed, painted, and other processes.

Different coating thickness
The thickness of hot-dip galvanized steel sheet is generally between 5-60μm, and its coating thickness is relatively uniform; while the thickness of galvanized steel sheet is generally between 5-25μm, and its coating thickness is uneven, which is easy to crack and chip when bending or cutting, affecting the appearance and anti-corrosion effect.

Different corrosion resistance
The corrosion resistance of hot-dip galvanized steel sheet is better than that of galvanized steel sheet. Because the coating of hot-dip galvanized steel sheet is uniform and dense, closely combined with the steel sheet substrate, it is not easy to fall off. At the same time, the density and purity of the surface zinc crystal are high, there are fewer impurities in the coating, and the corrosion resistance is strong. The coating of galvanized steel sheet is not dense enough and is easy to fall off, making it difficult to prevent corrosion for a long time.

Different mechanical properties
The mechanical properties of hot-dip galvanized steel sheet are slightly worse than those of galvanized steel sheet, mainly in terms of tensile strength and yield strength. Because the hot-dip galvanizing process will reduce the surface strength of the steel, the hot-dip galvanized steel sheet is slightly inferior to the galvanized steel sheet in terms of strength.

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