Canada Gate [SEP] material used
takes the form of a screen consisting of 5 portals of gilded wrought iron, the central section being the principal and largest gate; the double gates are supported on columns of iron. The two wrought iron bays flanking the central gate contain smaller gates, while the two terminating bays contain smaller pedestrian gates. The screen is terminated by two massive pillars of Portland stone surmounted by patriotic statuary. The flanking inner columns are smaller and, like the iron posts, are crowned by gas lanterns of similar design to those on the pillars
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