Carhenge [SEP] material used
Carhenge
Carhenge is a replica of England's Stonehenge located near the city of Alliance, Nebraska, in the High Plains region of the United States. Instead of being built with large standing stones, as is the case with the original Stonehenge, Carhenge is formed from vintage American automobiles, all covered with gray spray paint. Built by Jim Reinders, it was dedicated at the June 1987 summer solstice. In 2006, a visitor center was constructed to serve the site.
Structure.
Carhenge consists of 38 automobiles arranged
to cathodically protect metals that are exposed to sea water. A zinc disc attached to a ship's iron rudder will slowly corrode while the rudder stays intact. Similarly, a zinc plug attached to a propeller or the metal protective guard for the keel of the ship provides temporary protection.
With a standard electrode potential (SEP) of −0.76 volts, zinc is used as an anode material for batteries. (More reactive lithium (SEP −3.04 V) is used for anodes in lithium batteries ). Powdered zinc is used in