1.1 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.
1.2 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.
1.3 A variety of other porosity testing methods are described in the literature. , Other porosity test methods are B 735, B 741, B 798, and B 809. An ASTM Guide to the selection of porosity tests for electrodeposits and related metallic coatings is available as Guide B 765.
1.4 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 .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B374 Terminology Relating to Electroplating
B542 Terminology Relating to Electrical Contacts and Their Use
B735 Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor
B741 Test Method for Porosity In Gold Coatings On Metal Substrates By Paper Electrography
B765 Guide for Selection of Porosity and Gross Defect Tests for Electrodeposits and Related Metallic Coatings
B798 Test Method for Porosity in Gold or Palladium Coatings on Metal Substrates by Gel-Bulk Electrography
B809 Test Method for Porosity in Metallic Coatings by Humid Sulfur Vapor (Flowers-of-Sulfur)
gold coatings; gold platings; palladium coatings; palladium platings; plating porosity; pore corrosion test; porosity testing; sulfur dioxide test; sulfurous acid/SO2 test; Contact surfaces; Contamination--coatings; Corrosion--electrodeposited coatings; Defects--coatings; Destructive testing--coatings; Electrical contact materials (gold alloy); Electrodeposited coatings; Electrodeposited gold coatings; Electroplated coatings; Exposure tests; Metallic coatings; Noble metal coatings; Palladium alloy electrical contact materials; Pore corrosion; Porosity--electrodeposited/metallic coatings; Sulfur dioxide (SO2); Sulfurous acid/SO2 vapor test; Surface analysis--electrodeposits/electroplating;
ICS Number Code 25.220.40 (Metallic coatings)
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