01 March 2005
Polyurethane - A type of paint or resin known for its
Overspray - Sprayed paint that misses the area being
toughness, flexibility, weather resistance, chemical
painted and falls upon the surrounding surface.
resistance, and abrasion resistance. Commonly used
to make topcoats.
Oxidation - (1) A chemical reaction in which the atoms
in an element lose electrons. Any corrosion process
Pot Life - The usable or sprayable life of a coating or
involves oxidation of the metal in a true chemical sense.
sealant after mixing has occurred.
(2) The combination of a metal with oxygen which
produces oxides, e.g. the scaling of steel at high
Potentiostat - An electronic device that maintains a
metal at a constant potential with respect to a reference
Ozone - A triatomic (O3) form of oxygen formed naturally
from diatomic oxygen by electric discharge or exposure
to solar ultraviolet radiation. The generation of the
Potting Compound - A poured material which cures to
ozone layer in the upper atmosphere helps to minimize/
a hard rubberlike consistency and creates a seal. It
reduce the amount of harmful ultraviolet radiation
adds moisture resistance and vibration resistance to
produced by the sun. Ozone is an unstable, powerfully
bleaching, poisonous oxidizing agent used to purify and
deodorize air and sterilize water.
Powder Coating - A coating that is applied to the
surface as a dry, finely ground powder and then heated
above its melting point so that the powder particles flow
together or cure.
Passivation - The process or processes that cause a
metal to become inert to a given corrosive environment.
Primer Coat - The first coat of a protective paint system.
Passive metals have a very low corrosion rate.
Originally applied to improve adherence of succeeding
coat(s), it now usually also contains a corrosion inhibitor.
Peel - A method of separating a bond of two materials,
where the flexible material is pulled from the mating
surface at a 90° or 180° angle.
Relative Humidity - The ratio (expressed as a percent)
Phantom Gripe - An intermittent malfunction or failure
of the actual moisture content of the air relative to the
which cannot be verified/identified for corrective action.
maximum moisture content of the air fully saturated at
the same temperature.
pH - A term used to express the effective hydrogen ion
concentration of a solution. Values range from 0 to 14.
Retarders - A solvent added to a paint to slow down its
A pH of 7 indicates a neutral solution. Values lower than
7 indicate an acidic solution, while values greater than
7 indicate a basic solution.
Reversion - The process in which a cured material
reverts toward its precured condition, e.g. a cured
Pitting - A form of extremely localized attack that
potting compound reverts to a sticky, liquid-like
eventually results in holes in the metal. Pits may vary
from deep cavities of small diameter to relatively shallow
depressions. Pits may be isolated or so close together
Room Temperature Vulcanizing (RTV) - A process for
that they look like a rough surface.
treating or curing of synthetic rubber or plastic materials
which occurs at room temperature.
Plasticizer - A chemical added to rubber or resins to
impart flexibility and keep them soft and pliable.
Sacrificial Anode - A metal that is anodic to the metal
Polyethylene - A thermal plastic (softens with heat)
being protected. It corrodes preferentially when
characterized by high impact strength and high electrical
galvanically coupled to the protected metal and is
resistivity. One of several plastics used for wire coating,
consumed (sacrificed) during protection.
it is also used to create film and sheets for packaging.