and Nickel Palladium Plating
is palladium plating?
coatings are useful for many different purposes. From ASTM
B679 ˇV 98(2004)e1, ˇ§Palladium is the lightest and least
noble of the platinum group metals. It has a specific gravity
of 12.0, which is substantially less than gold (19.3) and
platinum (21.5). This yields a greater volume or thickness
of coating and, consequently, some saving of metal weight
accompanied by a small sacrifice in corrosion resistance
and reflectivity. The hardness range of electrodeposited
palladium compares favorably with the other electroplated
noble metals and their alloys.ˇ¨ As we see from the ASTM
specification, palladium coatings offer corrosion resistance
and reflectivity at a lower weight than gold or platinum.
Palladium coatings are harder than ˇ§hard goldˇ¨ or cobalt
hardened gold coatings in general. Palladiumˇ¦s non-oxidizing
properties make it useful for electrical and electronic
connectors. Palladium coatings can be applied to most types
of materials including metals and non-conductive plastics,
ceramics and other materials. Palladium coatings are more
ductile and less porous than hard gold. Some customers prefer
a flash of gold below the palladium topcoat to improve solderability.
coatings typically have a minimum thickness of 50uˇ¨ or
1.3 microns on functional surfaces. Palladium coatings are
harder, more corrosion resistant and less porous compared
to hard gold. Palladium is a precious metal and it costs
more than many other metals such as copper, nickel, tin
or silver. Palladium coatings appear white or gray in color.
Palladium coatings are softer and less wear resistant compared
to rhodium. Silver and copper are more electrically conductive,
and silver is also better for soldering and thermocompression
bonding compared to palladium.