Will iron nails rust faster in salt water or freshwater?

1. Does iron nail rust faster insltor fresh water

2. materials:

two nail,two cup,salt water,fresh water,

3. Hypothesis.I think that a nail rust faster in salt water because of the chemicals in the salt.

4. Procedure:

inde variable:same nail and fresh and salt water

dep variable:how many days will it take

con varable:size of nail,different water

steps

gather my m