Standard Test Method for Porosity in Gold and Palladium Coatings by Sulfurous Acid/ Sulfur-Dioxide Vapor
|Publication Date:||15 April 1995|
|ICS Code (Metallic coatings):||25.220.40|
This test method covers equipment and methods for determining the porosity of gold and palladium coatings, particularly electrodeposits and clad metals used on electrical contacts.
This test method is designed to show whether the porosity level is less or greater than some value which by experience is considered by the user to be acceptable for the intended application.
Avariety of other porosity testing methods are described in the literature. 2,3 Other porosity test methods are B735, B741, B798, and B809. An ASTM Guide to the selection of porosity tests for electrodeposits and related metallic coatings is available as Guide B765.
The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use. For specific hazards, see Section 6
2 For example see: Nobel, F. J., Ostrow, B. D., and Thompson, D. W., "Porosity Testing of Gold Deposits," Plating, Vol 52, 1965, p. 1001.
3 Krumbien, S. J., "Porosity Testing of Contact Platings," Proceedings, Connectors and Interconnection Technology Symposium, Oct. 1987, p 47.