Head II [SEP] material used
Head II
Head II is an oil and tempera on hardboard painting by the Irish-born British figurative artist Francis Bacon. Completed in 1948, it is the second in a series of six heads, painted from the winter of 1948 in preparation for a November 1949 exhibition at the Hanover Gallery, London. 
The figure seems half human, half animal, and has disintegrated to an extent that, like the preceding "Head I" of the series, the entire upper head has disappeared leaving only mouth and jaw.
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