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Alternatives to Hydrofluoric Acid -Reply



Hi Vince,

I do not have any experience with this app, but HF/nitric was a common
aluminum brighten for the truckwash industry years ago.  I believe they
where somewhat successful with sulfuric/nitric.  A similar brew was
also used to desmut aluminum after alkaline etching and before anodizing
or conversion coating.  Anyway, look at some of the alternative aluminum
brighteners for transportation and also desmuters for aluminum finishing.

John O. Sparks
USEPA
Design for the Environment
MC 7406
401 M St. , SW
Washington, DC 20460
Telephone 202-260-1682
FAX 202-260-0981
e-mail sparks.john@epamail.epa.gov