There is no specific answer different car makers go to more trouble than others to stop rust and so this means some brands go rusty faster than others. Fait for example use to be terrable for rusting out really fast don't know what they are like these days tho. However if you take any car near salt water it rust faster than if you don't. There are things you can do to make any car last longer tho, you can have the pannels taken off by a pannelbeater and they put like a wax type product on the car, this seems to make a huge difference. Hope this helps :)
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
A very long time. Longer than you probably have.
Aluminum does not rust. Alumininum can also be anodized to keep it from corroding when salt and other contaminats get on it.
Copper does not rust; it develops a greenish film called patina when exposed to air and moisture. The formation of patina can take several years, depending on the environmental conditions.
a few weeks
It can be days to months or longer for PID to appear.