Altschlossfelsen [SEP] material used
Altschlossfelsen
The Altschlossfelsen (, "Old Castle Rocks") is a rock outcrop formed of bunter sandstone in the Palatine Forest of Germany, near the border with France. The 1,500-metre-long rock wall is located on a hill known as the "Brechenberg" near Eppenbrunn, .
Discoveries from the Hallstatt and Roman period and evidence of a medieval castle from the 11th or 12th century bear witness to earlier settlement.
The "Altschlossfelsen" is well known because of its many, diversely shaped rocks, caused by weathering
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