1. The processing technology is different, one is chemical processing, the other is physical processing; the hot-dip galvanized galvanized layer is firm and not easy to fall off.
2. The hot-dip galvanized coating is thick, so the anti-corrosion ability is strong. The galvanized (electroplating process) coating is uniform and the process performance is good. The thickness of the coating is generally between 1 μm and more than ten μm.
3. Hot-dip galvanizing is an organic chemical treatment, which belongs to electrochemical corrosion. Galvanizing is a physical solution. Just brush a layer of zinc on the surface, and there is no galvanizing inside, so the zinc layer is easy to fall off. Hot-dip galvanizing is used in construction projects.
4. Hot-dip galvanized steel pipe is to make the molten metal react with the iron substrate to form an aluminum alloy layer, so that the substrate and the coating are closely combined.