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ASTM B679-98(2009)
Standard Specification for Electrodeposited Coatings of Palladium for Engineering Use
Automaticky přeložený název:
Standard Specification pro elektrolyticky vyloučené povlaky Palladia pro inženýrství použití
NORMA vydána dne 1.9.2009
Informace o normě:
Označení normy: ASTM B679-98(2009)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2009
Kód zboží: NS-7686
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM B679-98(2009) :
Keywords:
connectors, contacts, electrical connectors, electrical contacts, engineering coatings, palladium, palladium coatings, palladium electrodeposits, palladium platings, Electrodeposited Pd coatings--specifications, Engineered electrodeposited coatings--specifications, Palladium alloy electrical contact materials, ICS Number Code 25.220.40 (Metallic coatings)
Doplňující informace
| 1. Scope | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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).
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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| 2. Referenced Documents | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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