Hochheideturm [SEP] material used
Hochheideturm
Hochheideturm is a observation tower, with a completely glassed prospect platform on 831 metres high, located in Ettelsberg, Germany, near Willingen. The northwest side of the tower is the highest artificial climbing wall of Europe (height: 41 metres).
Construction.
Hochheideturm was designed by Kock Suck in Korbach and is constructed of reinforced concrete construction with octagonal cross section. 
Erection of Hochheideturm, which belongs to Ettelsberg aerial ropeway GmbH & CO. kg, cost 2 million euro and started in November 2001,
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