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Paper Drum
Paper insert placed on the reel
around which the coil is wound. The drum is used to eliminate damage
in the center of the coil. Certain customers may require that coils
are to be shipped with this paper drum.
Passivated Tin Plate
Tin plate that has been chemically
treated to control tin oxide formation
and growth.
Passivation
Treatment
See Chemical Treatment.
Peeling
Separation of the zinc coating
from the steel strip.
Peritectic Grade
Crack sensitive grade of steel
with .08 to .16% Carbon.
Phenolic
A type of resin made from a
condensation reaction of phenols and aldehydes. Resultant films have a
high degree of chemical resistance with limited flexibility
properties.
Pickler
1.
An operating unit that removes iron oxide from a hot rolled product by
immersion into a hydrochloric (#3/#5 Picklers) or sulfuric acid
solution. 2. The pickler tank contains 5-6% concentrations of
sulfuric acid. This solution is kept at a temperature of 180-190
degrees. The purpose of the pickler is to complete the preparation of
the steel for plating, by removing any oxides from the surface.
Pickling
The process of removing scale from
the strip by running it through a series of acid tubs.
Pin Hole Detector
Device that identifies and
tabulates the number of pin holes in a coil.
Plastic
Deformation
Permanent deformation
occurring in forming of metal which occurs after elastic limits have
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Pinholes
A coating defect consisting of the
randomly spaced small round holes (as a straight pin would make in the
cured film, which quite often occur in large numbers. The open area
(pinhole) usually exposes bare substrate. Contaminated substrate
or improperly dispersed lubricant or additive may cause pinholes.
Pinholes are typically caused by laminations, inclusions, scratches or
gouges.
Pitting
A coating defect consisting of
randomly spaced small depressions in the cured film. Pitting is
similar to pinholing, except that pits do not expose the bare
substrate.
Plater
An operating unit which
electrolytically applies zinc, chrome
or tin to black plate.
Post-Paint
To paint a manufactured part after
at it has been formed.
Powdering
A problem encountered in the field
where the iron-zinc coating (from Galvanneal products) comes off the
base metal and collects in the die.
Pre-Paint
To paint a product in coil form
and then manufacture it into a final part.
Press Forming
See Brake Press Bending.
Pretreated
Steel to which a chemical
treatment has been applied to prepare it for
future surface treatments such as painting. (See Bonderized, Light
Special Treatment, Special Treatment, Weirbrite Clear).
Prime Coil
Any coil produced by the line that
is not held for
any out-of-spec or quality reasons.
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