ASTM-B735 2022

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B735-16(2022) Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor

Published By	Publication Date	Number of Pages
ASTM	2022

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Categories: 25.220.40 - Metallic coatings, ASTM

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Description

ASTM B735-16-Reapproved2022

Active Standard: Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor

ASTM B735

Scope

1.1 This test method covers equipment and procedures for using nitric acid vapor for determining porosity in gold coatings, greater than 0.6 μm (25 μin.) in thickness, 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 that, 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 Guide B765 and in the literature.2^,3 Other porosity test methods are Test Methods B741, B798, B799, and B809.

1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.5 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 Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. Speciﬁc precautions are given in Section 8 and 9.4.

1.6 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

gold coatings; gold platings; nitric acid vapor; nitric acid vapor (porosity) test; plating porosity; pore corrosion test; porosity testing;

ICS Code

ICS Number Code 25.220.40 (Metallic coatings)

DOI: 10.1520/B0735-16R22

Additional information

Standard Title	B735-16(2022) Standard Test Method for Porosity in Gold Coatings on Metal Substrates by Nitric Acid Vapor
Published Code	ASTM
Publication Date	2022
ICS Codes	25.220.40 - Metallic coatings