Head I [SEP] material used
Head I
Head I is a relatively small oil and tempera on hardboard painting by the Irish-born British figurative artist Francis Bacon. Completed in 1948, it is the first in a series of six heads, the remainder of which were painted the following year in preparation for a November 1949 exhibition at the Hanover Gallery in London. Like the others in the series, it shows a screaming figure alone in a room, and focuses on the open mouth. The work shows a skull which has disintegrated on itself and is
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