Hot dip galvanization method for obtaining sandstone color coating from profile steel

The invention relates to a hot dip galvanization method for obtaining a sandstone color coating from profile steel, and belongs to the technical field of surface treatment of materials. The technicalproblem to be solved by the invention is to provide the hot dip galvanization method for obtaining the sandstone color coating with uniform single color from steel. The method comprises the followingsteps: immersing the steel into a plating solution with the temperature T of +/-5 DEG C and carrying out immersion plating for 1 to 10 minutes; and taking out, and first carrying out air cooling for 1to 10 minutes and then water cooling to room temperature to obtain the sandstone color coating, wherein T is equal to 481.55+77x0.825d, and d expresses the thickness of the steel. The invention provides a colorization hot dip galvanization technology; the colorization hot dip galvanization technology has the advantages of simple process, easily-controlled process parameters, wide process range window, low immersion plating