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| 配方类型： |
METAL TREATMENTS |
| 配方说明： |
Citric/Persulfate Desmutter for Aluminum (No.2) |
| 配方组成： |
Ferric Sulfate/0.5
Ammonium Persulfate/5.0
Water/84.5
Ammonium Bifluoride/0.1
Citric Acid (anhyd.)/10.0 |
| 配制方法： |
Note: This formula is considerably more aggressive than Formula No.1. The persulfate must be replenished daily. Use at room temperature with vigorous agitation.
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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