Papyrus 4 [SEP] material used
Papyrus 4
Papyrus 4 (, part of "Suppl. Gr." 1120) is an early New Testament papyrus of the Gospel of Luke in Greek. Opinions differ as to its age. It has been dated anywhere from the late second century to the fourth century.
Description.
It is one of the earliest manuscripts (along with ) of the Gospel of Luke and contains extensive sections of its first six chapters. It is currently housed in the Bibliothèque nationale de France (Suppl. Gr. 1120)
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