ASTM B 920 : 2016 : REDLINE
Current
The latest, up-to-date edition.
Standard Practice for Porosity in Gold and Palladium Alloy Coatings on Metal Substrates by Vapors of Sodium Hypochlorite Solution
English
19-10-2016
Important note : Users cannot be edited or removed once added to your Multi user PDF.CONTAINED IN VOL. 02.04, 2016 Defines equipment and methods for revealing the porosity of gold and palladium coatings, particularly electrodeposits and clad metals used on electrical contacts.
| Committee |
B 02
|
| DocumentType |
Redline
|
| Pages |
4
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Current
|
1.1This test practice covers equipment and methods for revealing the porosity of gold and palladium coatings, particularly electrodeposits and clad metals used on electrical contacts.
1.2This test practice is suitable for coatings containing gold or 75 % by mass of palladium on substrates of copper, nickel, and their alloys, which are commonly used in electrical contacts.
1.3A variety of full porosity testing methods is described in the literature.2,3 These porosity Test Methods are B735, B741, B798, B799, and B809. An ASTM Guide to the selection of porosity tests for electrodeposits and related metallic coatings is available as Guide B765.
1.4The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5This 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. For specific hazards, see Section 6.
| ASTM B 818 : 2003 : R2018 | Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy<brk/>(UNS R31233) Plate, Sheet and Strip |
| ASTM B 741 : 1995 : R2000 | Standard Test Method for Porosity In Gold Coatings On Metal Substrates By Paper Electrography (Withdrawn 2005) |
| ASTM B 735 : 2016 : REDLINE | Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor |
| ASTM B 542 : 2013 : REDLINE | Standard Terminology Relating to Electrical Contacts and Their Use |
| ASTM B 765 : 2003 : R2018 | Standard Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings |
| ASTM B 818 : 2003 : R2018 | Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy<brk/>(UNS R31233) Plate, Sheet and Strip |
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