how to calculate zinc consumption in hot dip galvanizing?

The calculation of zinc consumption in hot dip galvanizing is a process involving many factors, which need to consider the surface area of the steel, the thickness of the coating and the density of zinc. Here are some common methods of calculation:

Calculation based on surface area and coating thickness

Calculation formula: Zinc consumption = surface area of material to be plated (square decimeter) × coating thickness (decimeter) × zinc density (kg/cubic decimeter).

Specific steps: First measure the surface area of the material to be plated, including the inner and outer area; Then determine the thickness of the coating; Finally, the surface area, coating thickness and zinc density are calculated by the formula.

Calculation based on weight difference before and after galvanizing

Calculation formula: Zinc consumption = [(A-B) × C × D × E] / 1000. Where, A is the weight of the steel before galvanized (kg), B is the weight of the steel after galvanized (kg), C is the zinc content of the galvanized layer (%), D is the atomic weight of zinc (g/mol), and E is the molar mass of zinc (g/mol).

Specific steps: First weigh the steel before and after galvanized; Then the weight of zinc consumed in the galvanizing process is calculated according to the zinc content of the galvanizing layer. Finally, the relevant data are substituted into the formula.

Calculation of zinc mass per unit area

Calculation formula: Galvanized amount (g/m²) = 7.05 × (zinc layer weight (g) ÷ total pipe weight (g)) × 1000.

Specific steps: First measure the total weight of galvanized pipe and zinc layer weight; Then the mass of zinc layer per unit area is calculated according to the formula. Finally, it is converted to the total zinc consumption according to the actual needs.

To sum up, in practical application, the appropriate calculation method can be selected according to the specific situation. At the same time, it is also necessary to pay attention to the control of galvanized process parameters, such as temperature, time, etc., to ensure the quality and uniformity of the galvanized layer.