Water is the most abundant nutrient in our body and plays an important transmission function in every body cell and tissue. Sixty percent of our body weight is water. The fact that you can live without food for a long period of time, even months, but live only for a few days without water is true.
The addition of zinc, a sacrificial anode, would prevent the iron metal from corroding. According to the table of Standard Reduction Potentials, the standard reduction potential of zinc is about -0.76 volts. The standard reduction potential of iron is about -0.44 volts.
Ensure that the metal you are working with will rust. Only metals containing iron will rust, and some iron alloys will rust slowly or not at all. Stainless steel, an alloy of iron and chromium, will be very difficult to rust. Cast iron or wrought iron will rust most easily.