It depends on the material and other factors. Put a steel screw in dilute hydrochloric acid for about 30 seconds and then leave it in the air and it will rust within a few minutes. Do this on a hot summer day and it will be even faster.
Screws rust because the iron reacts with oxygen to form iron oxide.
Copper doesn't rust
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
yes.... anythin will rust a nail!
It depends on the conditions. Salt, acidity, temperature and humidity can all effect the rate at which it will rust. The material that the nail is made out of and any other nearby metals will also effect the rate at which it corrodes. In extreme conditions it may take as little as a few days for the rust to become apparent.
Copper doesn't rust
it washes it away and if you leave your skateboard outside the screws will rust and your grip tape will shed off
If they are an alloy, they will eventually rust.
How long will it t take a quarter to rust in fresh water
True stainless steel will not rust.
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.
yea if you left them out in the rain