Method for removing aluminum fluoride contamination from...

Details Method for removing aluminum fluoride contamination from... Method for removing aluminum fluoride contamination from...

2006-02-22

2009-12-01

Deo, Duy-Vu N (Department: 1792)

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

C438S745000, C438S754000

Reexamination Certificate

active

07624742

ABSTRACT:
Described are methods of removing aluminum fluoride contaminants from aluminum, anodized aluminum, and sprayed ceramic surfaces. Hydrofluoric acid, long known to be effective at removing certain contaminants, has not been used to dissolve aluminum fluoride on aluminum-containing surfaces because the hydrofluoric acid strongly attacks such surfaces, and consequently damages sensitive components. Methods used in accordance with some embodiments remove aluminum fluoride using a mixture of hydrofluoric acid and one or more anhydrous acid. Suitable anhydrous acids include acetic acid.

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