>> Aluminum is inert to citric acid, which is why soda pop is in aluminum cans. Not quite.... Soda pop doesn't eat through the cans because of a coating of varnish. I suspect that you're not seeing much reaction with the aluminum because there's an aluminum oxide layer protecting things. You anodize aluminum in an acid bath for example. >> I can't find citric acid One place you might not have thought of is the wine making supply places. Citric acid is often used in the home brewing process! Cheers, Dave _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list