ASTM-B679 2021

$34.13

B679-98(2021) Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use

Published By	Publication Date	Number of Pages
ASTM	2021

Guaranteed Safe Checkout

Categories: 25.220.40 - Metallic coatings, ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

ASTM B679-98-Reapproved2021

Active Standard: Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use

ASTM B679

Scope

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).2

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

connectors; contacts; electrical connectors; electrical contacts; engineering coatings; palladium; palladium coatings; palladium electrodeposits; palladium platings;

ICS Code

ICS Number Code 25.220.40 (Metallic coatings)

DOI: 10.1520/B0679-98R21

Additional information

	Approximate Hardness (HK25)
Gold	50–250
Ruthenium	600–1300
Rhodium	750–1100
Platinum	150–550
Palladium	75–600
Palladium-Nickel	300–650
ICS Codes	25.220.40 - Metallic coatings