| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Bright Zinc Plating |
| 配方组成： |
Maintenance brightener/0.1-0.25% by volume
Ammonium chloride/200 g/l
Makeup addition agent/21/2-5% by volume
Zinc chloride/31 g/l
Rang
Zinc chloride/15-50 g/l
Ammonium chloride/160-210 g/l
Makeup addition agent/21/2-5% by volume
Maintenance brightener/0.1-0.25% by volume |
| 配制方法： |
Operating Parameters: Operating parameters for the acid chloride systems differ somewhat, depending upon the particular proprietary electrolyte used; however, those given below are typical: pH/4.0-6.0 Temperature/24'C(18-30'F) Voltage Rack/1-8 Barrel/6-18 Anode current density/Not to exceed 2.5 amp/dm^2 Cathode current density Barrel/0.1-1.0 amp/dm^2 Rack/1.0-15.0 amp/dm^2 Air agitation is preferred in most processes. Cathode rod agitation is a useful adjunct, but in itself is often not sufficient to prevent pitting at normal current densities. Continuous filtration is mandatory for all acid chloride systems available at present. Tanks and superstructures should be lined with P.V.C., polypropylene, polyethylene, or similar plastisol coatings. |
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