Aluminum does not rust. Alumininum can also be anodized to keep it from corroding when salt and other contaminats get on it.
If they are an alloy, they will eventually rust.
How long will it t take a quarter to rust in fresh water
Under most conditions aluminum will not rust in water. However, if the aluminum is alloyed with another metal, oxidation (rusting) could take place.
Aluminium doesn't rust, ever. But it can corrode, which is similar. Anodising offers some protection, but it's all down to how bad the environment is. Bad enough, and any metal will take damage.
a long time
As long as you take proper care of them they should last you quite some time. Since aluminum is lightweight and can typically withstand different weather conditions, you should be just fine.
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.
How long it takes for an aluminum can to biodegrade
a week it take or two
5 months
50 years
A Few Hours