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BS EN ISO 14647:2016

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Metallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

05-31-2016

The nitric acid test is not suitable for gold coatings less than 0,6 micrometres thick, for coatings less noble than gold or platinum, or for gold-flashed palladium and its alloys

This International Standard specifies equipment and a method for using nitric acid vapour to determine porosity in gold coatings, particularly electrodeposits and clad metals used on electrical contacts.

This method is designed to show whether the porosity level is less than or greater than some value that, by experience, is considered by the user to be acceptable for the intended application.

It is suitable for in lays or claddings containing 75% or more of gold, for electro deposits containing 95% or more of gold or for substrates of copper, nickel and their alloys that are commonly used in electrical contacts.

The nitric acid vapour test is too severe to be used for gold coatings less than0,6 µm thick. It is also not suitable for coatings that are less noble than gold or platinum, such as palladium and its alloys, or gold-flashed palladium and its alloys.

Several other porosity testing methods are described in ISO 10308 and in the literature (see e.g. Bibliography,[1] and [2]).

Committee
STI/33
DevelopmentNote
Renumbers and supersedes BS ISO 14647. 2016 version incorporates corrigendum to BS ISO 14647. Supersedes 98/122705 DC. (05/2016)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 14647:2000 Identical
EN ISO 14647:2016 Identical

ISO 2080:2008 Metallic and other inorganic coatings Surface treatment, metallic and other inorganic coatings Vocabulary
ISO 2079:1981 Surface treatment and metallic coatings General classification of terms
ISO 10308:2006 Metallic coatings Review of porosity tests
ISO 2064:1996 Metallic and other inorganic coatings — Definitions and conventions concerning the measurement of thickness

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