"Rust" is a specific form of corrosion - where iron joins with oxygen. Therefore, the only thing that "rusts" in water is metal containing large amounts of iron, either "iron" or "steel." A lot of things will corrode, dissolve or otherwise deform if you put them in water.
Salt water.
It doesnt. salt water usually rusts metals faster because of the mixture of salt, water and oxygen that rusts the metal, but tap water has less oxygen and no salt.
it rusts
Sweat. Sweat and water. When they get on your jewlery, it rusts.
Chemical reaction from water
Rusting is possible in the presence of oxygen and water.
ejecule
Vinegar being an acid rusts fast lemon juice is also acidic but very weakly.
an object rusts when it is attached by air,water and other chemicals
Oxidation. Water, oxygen, and metal.
put it in water and if it rusts then its fake and if it doesnt then its real :)
I would probally say salt water, because you know when the snow plows come, they spray salt stuff, when that gets on you'r car it rusts. And water rusts stuff too, so it would be like doubled fast then water.