23. Solving a chemistry problem

11. 15 kg of parts with a specific surface of 19.2 dm2/kg are simultaneously loaded into a galvanizing bath with a load of 80 A. What is the duration of the coating process to obtain a zinc deposit 15 microns thick if the current efficiency is 90%. Draw polarization curves if the electrolyte is zinc sulfate. The density of zinc is 7.14 g/cm3.