Galvanized square tube has hot galvanized square tube and electric galvanized square tube two categories
Galvanized square tube has hot galvanized square tube and electric galvanized square tube two categories.Hot-dip galvanized square pipe has wet method, dry method, lead zinc method, REDOX method, etc.The main difference of different hot-dip galvanizing methods is the method to activate the surface of the steel tube to improve the quality of galvanizing after the steel tube is cleaned by acid leaching.The dry method and REDOX method are mainly used in current production, and their characteristics are shown in the table.The surface of electroplating zinc layer is very smooth and compact, and the structure is even.Good mechanical properties and corrosion resistance;Zinc consumption is 60%~75% lower than hot dip galvanization.Electroplating has certain technical complexity, but it is necessary to use this method for single-side coating, double-side coating with different thickness on inner and outer surface coating, and thin-wall galvanized tube
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