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There are two kinds of galvanizing methods for seamless steel pipes: hot dip galvanizing and electro galvanizing. Hot dip galvanizing includes wet method, dry method, lead-zinc method, oxidation-reduction method, etc. the main difference between different hot-dip galvanizing methods is what method is used to activate the pipe surface and improve the galvanizing quality after steel pipe acid leaching cleaning.
The surface of the zinc layer is very smooth, dense and uniform; Good mechanical properties and corrosion resistance; The zinc consumption is 60% ~ 75% lower than that of hot dip galvanizing. Electro galvanizing has certain technical complexity, but this method must be used for single-sided coating, double-sided coating with different thickness of internal and external surface coating, and thin-wall pipe galvanizing.

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