The zinc coating layer weighing method is also named as dezincification method. According to the relevant provisions of GB/T13825, dip the sample into the deplating solution, dissolve the hot dip galvanized layer on the surface of the sample, weigh the quality of the galvanized layer before and after dissolution, and calculate the quality of the hot dip galvanized layer on the unit area of the sample according to the quality loss of the sample. This method is suitable for samples with easy surface area measurement, such as steel plates, steel pipes, and steel wires. The amount of the galvanized layer measured by this method shall be converted into the thickness of the galvanized layer in accordance with the density of the zinc coating layer (7.2 g/cm3). In the ASTM standard, the density of the zinc coating layer is 7.1 g/cm3 after conversion.