Bořeň [SEP] material used
Bořeň
Bořeň (539 m) (also known as Biliner-stein, Borschen), is a phonolite hill two kilometres south of Bílina in northwest Bohemia, Czech Republic. When seen from the northwest side, the hill has the shape of a lying lion. It is a structure similar to the Devils Tower in Wyoming, and is the largest phonolite structure of its kind in Europe. Bořen dominates both the town Bílina and the Czech Central Mountains, with its distinctive silhouette visible from a number of remote locations.
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