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BSI BS EN ISO 14647:2016

Metallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test
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BSI BS EN ISO 14647:2016

Metallic coatings. Determination of porosity in gold coatings on metal substrates. Nitric acid vapour test

PUBLISH DATE 2016
PAGES 18
BSI BS EN ISO 14647:2016

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]).

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
SDO BSI: British Standards Institution
Document Number ISO 14647
Publication Date May 31, 2016
Language en - English
Page Count 18
Revision Level
Supercedes
Committee STI/33
Publish Date Document Id Type View
May 15, 2000 BS EN ISO 14647:2016 Revision
Jan. 1, 2000 BS ISO 14647:2000 Revision
May 31, 2016 BS EN ISO 14647:2016 Consolidated