ASTM B 867 Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use
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ASTM B 867 Document Information:
Title
Standard Specification for Electrodeposited Coatings of Palladium-Nickel for Engineering Use
ASTM International
Publication Date:
Oct 10, 1995
Scope:
Composition - This specification covers requirements for
electrodeposited palladium-nickel coatings
containing between 70 and 95 mass % of palladium metal. Composite
coatings consisting of
palladium-nickel and a thin gold over-plate for applications involving
electrical contacts are also
covered.
Properties - Palladium is the lightest and least noble of the platinum
group metals.
Palladium-nickel is a solid solution alloy of palladium and nickel.
Electroplated palladium-nickel
alloys have a density between 10 and 11.5, which is substantially less
than electroplated gold
(17.0 to 19.3) and comparable to electroplated pure palladium (10.5 to
11.8). This yields a greater
volume or thickness of coating per unit mass and, consequently, some
saving of metal weight. The
hardness range of electrodeposited palladium-nickel compares favorably
with electroplated noble
metals and their alloys (1, 2).
NOTE 1 - Electroplated deposits generally have a lower density than
their wrought metal
counterparts.
The values stated in SI units are to be regarded as the standard. The
values given in parentheses
are for information only.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
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