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| 配方类型： |
METAL TREATMENTS |
| 配方说明： |
Citric/Persulfate Desmutter for Aluminum (No.1) |
| 配方组成： |
Ammonium Persulfate/5
Water/85
Citric Acid (anhyd.)/10 |
| 配制方法： |
Note: The persulfate decomposes easily and must be replenished daily. Use at room temperature with vigorous agitation. Bath life is good to >1% copper concentration in the solution.
Note: Citric acid is used in conjunction with persulfate salts for the removal of black smut from aluminum-copper alloys after cleaning with caustic or a nonalkaline cleaner. The persulfate oxidizes the copper to a soluble form. The citric acid then chelates the copper preventing redeposition on the aluminum. These systems do not attack the base metal aluminum. |
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