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.
Metal Selection. Cast gray iron: Long a standard for gratings and bollards, gray iron offers the best balance of strength, durability and low cost. 100% post consumer recycled metal. Cast ductile iron: Ductile iron is more malleable and less brittle than gray iron allowing for a greater strength to weight ratio.