Copper doesn't rust
If they are an alloy, they will eventually rust.
How long will it t take a quarter to rust in fresh water
a long time
It depends on the quality of the nail. If it is painted it Amy take long to rust. In general it may take a month or so for the nail to rust.
a week it take or two
5 months
50 years
Cannot rust. No oxygen or water.
about 14 days
it will probably take at least 5 minutes for a needle to rust unless it is copper.
depends on the amount of oxygen and water supplied . If left in normal condition it may take 5 days to rust