Rust

ok so im going to use iron nails of the same size and observe the reactions with my solutions (in test tubes/glasses). for my solutions i've decided to maybe use sodium chloride (table salt) - maybe another one with half the amount of salt, tap water, water with no air present (boiled water), vinegar, no water (just air) and possibly for all these doin it with the nail partially submerged. The reason i chose sodium chloride and vinegar is to replicate what environment where rust is likely to occur. So sodiun chloride would replicate somewhere near the coast where there is sea-spray and the vinegar would represent acid-rain.

My aim will be to observe what situation will be necessary for corrosion to occur.
hopefully i will find out what causes iron to rust and describe the extent and colour of the rust.

so im probably going to weigh the nail first before putting it into the solutions for about 3 - 4 days and after rub the rust off and weigh it again to see the weight difference. might repeated it 2-3 times?