Electro-galvanization is galvanization by electrode reaction; hot-dip galvanization is zinc plated by dipping the raw material into molten zinc;

　　In hot-dip galvanizing, the surface of the raw material is a layer of intermetallic compound followed by zinc, while the surface of electro-galvanizing is zinc and there is no intermediate layer.

　　Electro-galvanized zinc has a thinner zinc layer, while hot-dip galvanized zinc has a thicker zinc layer.

　　Electro-galvanizing is an electrochemical reaction, while hot-dip galvanizing is a physical reaction.

　　Electro-galvanization and hot-dip galvanization have the same principle of corrosion protection. Only the process is different between the two.

　　After galvanizing - the surface is bright and clean. Bright appearance. However, as the zinc layer is attached to the surface, it will fall off after a long time.

　　Hot-dip galvanized - The appearance is not as beautiful as electroplating. But the zinc layer has penetration, and the use time is longer than electroplating.

　　Hot-dip galvanizing has much higher corrosion resistance than galvanizing, mainly because the thickness of hot-dip galvanizing is much thicker than galvanizing, but the appearance of hot-dip galvanizing is worse than galvanizing. The cost of hot-dip galvanizing is higher.