Insinger Papyrus [SEP] material used
Insinger Papyrus
Insinger Papyrus ("Papyrus Insinger") is a papyrus find from ancient Egypt and contains one of the oldest extant writings about Egyptian wisdom teachings (Sebayt). The manuscript is dated to around the 2nd century AD and the main part is kept at the Rijksmuseum van Oudheden in Leiden.
Contents.
The Insinger Papyrus is a fragmented papyrus scroll with the beginning and end of the scroll missing, the size is about 612 × 27.5 cm (241 × 10,5 inches). The text is written on
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