What household things contain zinc? - (May/23/2011 )

Im doing an experiment and I need to see whether acids or bases corode metals more easily. I tried the experiment with rusty iron nails but didnt get any results!! Ive heard that zinc is reactive but what things in the house contain zinc??

some ointments (but it's an oxide), brass (an alloy of zinc and copper), metal toys (e.g. die-cast toys or cars such as from Matchbox), many metal surfaces are galvanized with a zinc coat (against corrosion).

zinc roof.... for absolute....

Most cover of battery, pure zinc.