CONVERTER-- A device for changing one type of
CATHODIC PROTECTION-- A technique or
signal to another; for example, alternating current
system used to reduce or eliminate the corrosion of
to direct current.
a metal by making it the cathode of an
electrochemical cell by means of an impressed
CORROSION-- The reaction between a material and
direct current or attachment of sacrificial anodes
its environment that results in the loss of the
such as zinc, magnesium, or aluminum.
material or its properties; for example, the
transformation of a metal, used as a material of
CELL-- A single unit that transforms chemical energy
construction, from the metallic to the nonmetallic
into electrical energy.
CHARGE-- A term representing electrical energy. A
CORROSION POTENTIAL-- The potential that a
material having an excess of electrons is said to
corroding metal exhibits under specific conditions
have a negative charge. A material having an
of concentration, time, temperature, aeration, or
absence of electrons is said to have a positive
velocity in an electrolytic solution and measured
relative to a reference electrode under open-circuit
CIRCUIT-- The complete path of an electric current.
CIRCULAR MIL-- An area equal to that of a circle
CORROSION PRODUCT-- A product resulting
with a diameter of 0.001 inch. It is used for
from corrosion. The term applies to solid
measuring the cross-sectional area of wires.
compounds, gases, or ions resulting from a
CLOCK-- An instrument for measuring and indicating
time, such as a synchronous pulse generator.
CORROSION RATE-- The speed at which corrosion
COMPONENT PARTS-- Individual units of a
progresses. Frequently expressed as a constant loss
or penetration per unit time. Common units used are
roils penetration per year (mpy), millimeters
COMPONENTS-- Any electrical device, such as a
penetration per year (mm/y), micrometers
coil, resistor, or transistor.
penetration per year (um/y). 1 mil = 0,001 inch, 1
CONDITION-- The state of being of a device such as
mm = 0.001 meter, 1 um = 0.000001 meter.
ON-OFF or GO-NO-GO.
COULOMB-- A measure of the quantity of electricity.
CONDUCTANCE-- The ability of a material to
One coulomb is equal to 6.28 x
conduct or carry an electric current. It is the
COULOMB'S LAW-- Also called the law of electric
reciprocal of the resistance of the material and is
charges or the law of electrostatic attraction.
expressed in mhos or siemans.
Coulomb's law states that charged bodies attract or
CONDUCTIVITY-- The ease with which a substance
repel each other with a force that is directly
proportional to the product of their individual
charges and inversely proportional to the square of
CONDUCTOR-- (1) A material with a large number
the distance between them.
of free electrons. (2) A material that easily permits
electric current to flow.
COUPLE-- A cell developed in an electrolytic solution
resulting from electrical contact between two
CONTINUOUS DISPLAY-- An electrical instrument
giving a continuous indication of a measured
dissimilar metals; two dissimilar metals in
CPR-- Cardiopulmonary resuscitation.
CONTROL MODE-- The method of system control
at a given time.
CROSS-SECTIONAL AREA-- The area of a "slice"
of an object. When applied to electrical conductors,
CONTROL POWER-- The power used to control or
it is usually expressed in circular roils.
operate a component.
CURRENT-- The drift of electrons past a reference
CONTROL SIGNAL-- The signal applied to a device
point. The passage of electrons through a
that makes corrective changes in a controlled
conductor. Measured in amperes.