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ASTM B679-98(2009)

Historical Reaffirmation

Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use

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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 PropertiesPalladium 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)
Gold50250
Palladium75600
Platinum150550
Palladium-Nickel300650
Rhodium7501100
Ruthenium6001300

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.

This specification establishes the requirements for electrodeposited palladium coatings for use in engineering applications. This specification also covers composite coatings of palladium with a thin gold overplate for applications involving electrical contacts. The plating system shall indicate the basis metal involved, thickness of the underplates, thickness of the palladium coating, and grade of the gold overplate. Coatings shall be sampled, tested, and conform accordingly to specified requirements as to purity, appearance, thickness, dutility, adhesion (to be examined either by bend, heat, or cutting test), and integrity (gross defects, mechanical damage, and porosity).


SDO ASTM: ASTM International
Document Number B679
Publication Date Sept. 1, 2009
Language en - English
Page Count 6
Revision Level 98(2009)
Supercedes
Committee B08.04
Publish Date Document Id Type View
March 10, 1998 B0679-98 Revision
Oct. 1, 2021 B0679-98R21 Reaffirmation
Nov. 1, 2015 B0679-98R15 Reaffirmation
Sept. 1, 2009 B0679-98R09 Reaffirmation
April 1, 2004 B0679-98R04E01 Reaffirmation