Papyrus 104 [SEP] material used
Papyrus 104
Papyrus 104 (in the Gregory-Aland numbering), designated by the symbol formula_1, is a fragment that is part of a leaf from a papyrus codex, it measures 2.5 by 3.75 inches (6.35 by 9.5 cm) at its widest. It is conserved in the Papyrology Rooms at Sackler Library, Oxford, UK. The front (recto) contains lines from the Gospel of Matthew 21:34-37, in Greek, the back (verso) contains tentative traces of lines from verses 43 and 45
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