| 配方類型： |
METALS |
| 配方說明： |
Plating Steel Hardware |
| 配方組成： |
pH/5.8 to 5.9
Ammonium Chloride/2 oz/gal
2. Silver plate 1 hour to 1.25 hours at 5 amp.sq ft in a solution
containing
Silver Metal/1.5 oz/gal
Free Sodium Cyanide*/5.0 oz/gal
*Highly poisonous.
Boric Acid/4 oz/gal
Cyanide*/8.0 oz/gal
Nickel (as Metal)/3 oz/gal
Silver Metal/0.4 oz/gal
*Highly poisonous. |
| 配制方法： |
Add carbon disulfide brightener, 2 oz/qt of silver strike solution, as required.
3. Immerse in silver-recovery concentration rinse.
4. Rinse in cold water.
5. Oxidize in a solution containing one-eighth oz/gal of sodium polysulfide, operated at 180 to 190F.
6. Rinse in cold water.
7. Rinse in hot water and dry.
If a plain silver finish is desired, the process is terminated at step 4. The oxidizing process, steps 5 to 7, can be applied, following the cycle for copper-plating.
Bronze parts are silver-plated by the same process as that described for steel parts. |
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