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.
The only metals that can rust are iron and alloys that contain iron, such as steel. Other metals may become corroded but they do not technically rust. For example, the corrosion of copper and its alloys, bronze and brass, produces a green layer called patina or verdigris.