• ASTM B679-98(2009)

ASTM B679-98(2009)

Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use

ASTM International, 09/01/2009

Publisher: ASTM

File Format: PDF

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Published:01/09/2009

Pages:6

File Size:1 file , 130 KB

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1.1 This specification covers requirements for electrodeposited palladium coatings containing at least 99.7 mass % of palladium metal. Composite coatings consisting of palladium with a thin gold overplate for applications involving electrical contacts are also covered.

1.2 Properties - 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 following table compares the hardness range of electrodeposited palladium with other electrodeposited noble metals and alloys (1,2).

Approximate Hardness (HK25)
Gold 50-250
Palladium 75-600
Platinum 150-550
Palladium-Nickel 300-650
Rhodium 750-1100
Ruthenium 600-1300

1.3 The values stated in SI units are the preferred values. Values provided in parentheses are for information only.

1.4 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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