ASTM B374-06
(Terminology)Standard Terminology Relating to Electroplating
Standard Terminology Relating to Electroplating
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Endorsed by American
Designation:B374–06 Electroplaters’ Society
Endorsed by National
Association of Metal Finishers
Standard Terminology Relating to
1
Electroplating
This standard is issued under the fixed designation B374; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
These definitions correspond to interpretations as applied to electroplating and do not necessarily
correspond to the definitions used in other fields.
1. Referenced Documents amorphous—noncrystalline, or devoid of regular structure.
2
ampere—the current that will deposit silver at the rate of
1.1 ASTM Standards:
0.0011180 g/s. Current flowing at the rate of 1 C/s.
B368 TestMethodforCopper-AcceleratedAceticAcid-Salt
−8
˚
angström unit (A)—10 cm.
Spray (Fog) Testing (CASS Test)
anion—a negatively-charged ion.
2. Terminology anode—the electrode in electrolysis, at which negative ions
are discharged, positive ions are formed, or other oxidizing
abrasive blasting—a process for cleaning or finishing by
reactions occur.
means of an abrasive directed at high velocity against the
anode corrosion—dissolution of anode metal by the electro-
work piece.
chemical action in an electrolytic cell.
activator—in diffusion coatings, a chemical, usually a halide
anode efficiency—current efficiency of a specified anodic
salt, that enters into a reaction with the source or master
process.
alloy, depositing the source on the substrate.
anode film—(1)thelayerofsolutionincontactwiththeanode
activation—elimination of a passive condition on a surface.
that differs in composition from that of the bulk of the
activity (ion)—the ion concentration corrected for deviations
solution. (2) The outer layer of the anode itself consisting of
from ideal behavior. Concentration multiplied by activity
oxidation or reaction products of the anode metal.
coefficient.
anode polarization—See polarization.
addition agent—a material added in small quantities to a
anodic coating—a protective, decorative, or functional coat-
solution to modify its characteristics. It is usually added to a
ing, formed by conversion of the surface of a metal in an
platingsolutionforthepurposeofmodifyingthecharacterof
electrolytic oxidation process.
a deposit.
anodizing—an electrolytic oxidation process in which the
adhesion—the attractive force that exists between an elec-
surface of a metal, when anodic, is converted to a coating
trodeposit and its substrate that can be measured as the force
having desirable protective, decorative, or functional prop-
required to separate an electrodeposit and its substrate.
erties.
adhesion, practical, n—the force or work required to detach
anolyte—theportionofelectrolyteinthevicinityoftheanode;
or remove a coating from the underlayer or substrate; it can
in a divided cell, the portion of electrolyte on the anode side
be measured in terms of peel, pull, or shear strength as an
of the diaphragm.
experimentally determined quantity.
anti-pitting agent—an addition agent for the specific purpose
aluminizing—forming of an aluminum or aluminum alloy
of preventing gas pits in a deposit.
coatingonametalbyhotdipping,hotspraying,ordiffusion.
autocatalytic plating—deposition of a metal coating by a
controlled chemical reduction, catalyzed by the metal or
alloy being deposited.
1
This terminology is under the jurisdiction of ASTM Committee B08 on
automatic machine (or conveyor)—a machine for mechani-
Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee
cally processing parts through treatment cycles, such as
B08.01 on Ancillary Activities.
cleaning, anodizing, or plating.
Current edition approved May 15, 2006. Published June 2006. Originally
automatic plating: (1) full—plating in which the cathodes are
approved in 1961. Last previous edition approved in 2003 as B374–96 (2003).
DOI: 10.1520/B0374-06.
automatically conveyed through successive cleaning and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
plating tanks. (2) semi—plating in which the cathodes are
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
conveyed automatically through only one plating tank.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. auxiliary anode—a supplementary anode employed during
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B374–06
electrodeposition to achieve a desired thickness distribution bright plating—a process that produces an el
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