... substrate binding. NH4Cl 100-150g / L, ZnCl2 150-180g / L, 70 ~ 80 °C, 1 ~ 2min. And a certain amount of ... high, not less than 30 ° C is not higher than 70 ° C.(9) testsPlating bright appearance, meticulous, non-sagging, wrinkled ... salt spray test and copper sulfate.5 zinc ash, zinc dross formation and control5.1 zinc ash, zinc dross formationZinc ash, zinc dross not only seriously affect the ...