Foshan aluminum quad sink zinc 1. Process characteristics: easy to operate, suitable for rack and barrel plating. Environmental protection. Can produce a dense and uniform thin quaternary metal sink zinc aluminum surface for subsequent processes direct copper, nickel, tin, chemical nickel provides good adhesion. 2. Bath composition and operating conditions: raw material and operating conditions standard open cylinder capacity range Foshan aluminum four yuan Shen zinc 250 ml 180-270 ml / liter temperature 21-24 ℃ 18-43 ℃ time of 30-60 seconds 20- 120 seconds Zn 11 g / l 8-12 g / l solution 3. Maintenance: Foshan supplement zinc aluminum quad Shen agents can share calculations. Concentration of the solution at 250 ml / l, the specific gravity of the unit is approximately 1.10, and the gravity of the solution should be maintained at between 1.08-1.12. 0.01 per share to enhance the unit need to add 20 ml / liter aluminum non-cyanide zinc sink each added 22 ml / liter of aluminum non-cyanide zinc sink, providing 1 g / l of zinc content