it will probably take at least 5 minutes for a needle to rust unless it is copper.
it depends on the conditions
magnetic needle
Copper doesn't rust
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.
The oxygen dissolved in the water combines with the iron to form iron oxide, or rust (Fe2O3H2O).
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.
oxygen and moisture
a week it take or two
50 years
5 months
Cannot rust. No oxygen or water.
Typical sewing needles are stainless steel. Normally they do not rust, but can under severe conditions.
water and iron. Creating iron oxide aka rust.